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Date: Thu, 1 Nov 2018 17:34:46 -0500
From: Benjamin Kaduk <kaduk@mit.edu>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
Cc: "Xialiang (Frank, Network Integration Technology Research Dept)" <frank.xialiang@huawei.com>,  "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "dots@ietf.org" <dots@ietf.org>
Message-ID: <20181101223445.GI45914@kduck.kaduk.org>
References: <20181030213111.GW45914@kduck.kaduk.org> <787AE7BB302AE849A7480A190F8B93302E03AF8C@OPEXCLILMA3.corporate.adroot.infra.ftgroup> <C02846B1344F344EB4FAA6FA7AF481F12C89F23F@dggemm511-mbs.china.huawei.com> <BN6PR16MB142533995A36363EAA1F517FEACE0@BN6PR16MB1425.namprd16.prod.outlook.com>
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Subject: Re: [Dots] =?utf-8?b?562U5aSNOiBoaWdoLWxldmVsIHF1ZXN0aW9ucyBhYm91?= =?utf-8?q?t_the_signal_channel?=
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On Thu, Nov 01, 2018 at 03:49:35AM +0000, Konda, Tirumaleswar Reddy wrote:
> Hi Frank,
> 
> Please see inline
> 
> > -----Original Message-----
> > From: Dots <dots-bounces@ietf.org> On Behalf Of Xialiang (Frank, Network
> > Integration Technology Research Dept)
> > Sent: Thursday, November 1, 2018 7:31 AM
> > To: mohamed.boucadair@orange.com; Benjamin Kaduk <kaduk@mit.edu>
> > Cc: dots@ietf.org
> > Subject: [Dots] 答复: high-level questions about the signal channel
> > 
> > 
> > 
> > Hi,
> > Please see my comment inline:
> > 
> > -----邮件原件-----
> > 发件人: Dots [mailto:dots-bounces@ietf.org] 代表
> > mohamed.boucadair@orange.com
> > 发送时间: 2018年10月31日 15:56
> > 收件人: Benjamin Kaduk <kaduk@mit.edu>; dots@ietf.org
> > 主题: Re: [Dots] high-level questions about the signal channel
> > 
> > Hi Benjamin,
> > 
> > Please see inline.
> > 
> > Cheers,
> > Med
> > 
> > > -----Message d'origine-----
> > > De : Dots [mailto:dots-bounces@ietf.org] De la part de Benjamin Kaduk
> > > Envoyé : mardi 30 octobre 2018 22:31 À : dots@ietf.org Objet : [Dots]
> > > high-level questions about the signal channel
> > >
> > > Hi folks,
> > >
> > > I'm still working through my AD review of the signal channel doc (my
> > > apologies for it taking so long!), and I have a couple of high-level
> > > questions that it seems worth talking about in parallel with the rest
> > > of my review.
> > >
> > > All of the CoAP resources are under .well-known/dots/, but we have
> > > requested/allocated a dedicated port for dots usage.  It seems that we
> > > could assert that dots is the only service running on that port and
> > > get shorter URLs instead of using this prefix.  I mostly assume that
> > > this was well-discussed before I started following the WG, so
> > > hopefully there is an easy pointer to the list archives that I can read up on.
> > 
> > [Med] This was agreed in an interim in 10/2017 and implemented in -07. You
> > may check this thread for the more context:
> > https://mailarchive.ietf.org/arch/msg/dots/fbCvp2evaOD-DXuUgh2xK65dM7M
> > 
> > >
> > > In a similar vein, using "cuid-<foo>" and "mid=<bar>" and such in
> > > uri-paths feels unusual to me (in that the assignment feels like a
> > > parameter that belongs in the request body as opposed to a path, or
> > > having a fixed tree hierarchy for "mid is a child of cuid is a child
> > > of cdid is a child of resource" and using what are effectively
> > > positional arguments.  To be clear, I'm explicitly *not* objecting to
> > > this choice; I'd just appreciate a pointer to the previous discussion about it to
> > help me understand better.
> > 
> > [Med] We used to have those in the body, but we changed the design as a fix to
> > the issue discussed in this thread:
> > https://mailarchive.ietf.org/arch/msg/dots/GzcUtlXZAfVXuBunC-ydVGl843w
> > 
> > >
> > > What is the scope of a "DOTS session"?
> > 
> > [Med] In short, please refer to https://tools.ietf.org/html/draft-ietf-dots-
> > architecture-07#section-3.1.
> > 
> >  I see that the sid uri-path is only
> > > present on the session-configuration-affecting requests, but not for
> > > mitigations -- are mitigation requests associated with a session somehow?
> > 
> > [Med] sid is about a **configuration session**, that is exchanges that occur for
> > configuration purposes.
> > 
> > The draft says the following:
> > 
> >    sid:  Session Identifier is an identifier for the DOTS signal channel
> >       session configuration data represented
> > [Frank]: To be more clear, my understanding is there is one and only one
> > session between a DOTS client and a DOTS server, so all the mitigation
> > requests over this session share the same session configurations. Is my
> > understanding right?
> 
> It is discussed in the draft to use a single DOTS session b/w DOTS agents.
> 
> <snip>
>    A single DOTS signal channel between DOTS agents can be used to
>    exchange multiple DOTS signal messages.  To reduce DOTS client and
>    DOTS server workload, DOTS clients SHOULD re-use the (D)TLS session.
> </snip>
> 
> Mitigation requests are not tied to a DOTS session. Mitigation requests are associated with a DOTS client and can be updated/deleted using different DOTS sessions.

Thanks for the discussion.  It's sounding like one could model a DOTS
session as basically a DTLS association (but of course DTLS is not the
only permitted transport for the signal channel, so it's not exactly the
same).

-Ben


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Benjamin Kaduk <kaduk@mit.edu>
CC: "Xialiang (Frank, Network Integration Technology Research Dept)" <frank.xialiang@huawei.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "dots@ietf.org" <dots@ietf.org>
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From nobody Fri Nov  2 00:53:29 2018
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Subject: [Dots] Last Call Extended: <draft-ietf-dots-requirements-16.txt> (Distributed Denial of Service (DDoS) Open Threat Signaling Requirements) to Informational RFC
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The IESG has received a request from the DDoS Open Threat Signaling WG (dots)
to consider the following document: - 'Distributed Denial of Service (DDoS)
Open Threat Signaling
   Requirements'
  <draft-ietf-dots-requirements-16.txt> as Informational RFC

The IESG plans to make a decision in the next few weeks, and solicits final
comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2018-11-23. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the beginning of
the Subject line to allow automated sorting.

Abstract


   This document defines the requirements for the Distributed Denial of
   Service (DDoS) Open Threat Signaling (DOTS) protocols enabling
   coordinated response to DDoS attacks.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-dots-requirements/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-dots-requirements/ballot/

The following IPR Declarations may be related to this I-D:

   https://datatracker.ietf.org/ipr/2744/






From nobody Fri Nov  2 19:14:53 2018
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From: Roman Danyliw <rdd@cert.org>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: Workflow question about draft-h-dots-mitigation-offload-expansion-00
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Date: Sat, 3 Nov 2018 02:14:40 +0000
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Subject: [Dots] Workflow question about draft-h-dots-mitigation-offload-expansion-00
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Hello!=0A=
(chair hat off)=0A=
=0A=
In reviewing draft-h-dots-mitigation-offload-expansion-00, I had a few ques=
tions about the sequence of events described in Figure #2.  For simplicity,=
 I've numbered each of the steps in Figure 2 as follows:=0A=
=0A=
(1) [telemetry system]->[orchestrator]: DOTS Mitigation Request=0A=
(2) [network admin]->[orchestrator]: DOTS Mitigation Request=0A=
(3) [orchestrator]->[routers/switch]: BGP redirect mitigation=0A=
(4) [DMS]->[orchestrator]: DOTS Mitigation Request=0A=
(5) [orchestrator]->[routers/switch]: BGP redirect mitigation=0A=
=0A=
** After the telemetry system makes the mitigation request in (1), will the=
 orchestrator block on a response awaiting for action from the network admi=
nistrator (as the text notes that the 'network administrator' will confirm =
the request)? =0A=
=0A=
** Is there an implicit out-of-band channel between the orchestrator and ne=
twork admins to enable (2)?  Why does the network admin have to be a DOTS c=
lient rather than a function in the orchestrator (out of scope for DOTS)?=
=0A=
=0A=
** Will the mitigation status requests back to the telemetry system and net=
work admins in (1) and (2) be the same?=0A=
=0A=
** Is the traffic examined by the DMS the same as seen by the telemetry sys=
tems?  How was the DMS tasked to examine the traffic -- was that an implici=
t communication channel from the orchestrator?=0A=
=0A=
** If the orchestrator tasked the routers/switches per (3) to handle the at=
tack traffic, how did the DMS get involved in the mitigation?  What's the d=
ifference between the attack traffic handled by (3) and the DMS?  How is th=
at coordination happening? =0A=
=0A=
Roman=0A=
=0A=


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From: =?UTF-8?Q?T=C3=B6ma_Gavrichenkov?= <ximaera@gmail.com>
Date: Sat, 3 Nov 2018 07:57:21 +0400
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Subject: Re: [Dots] Workflow question about draft-h-dots-mitigation-offload-expansion-00
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Hello all,

On Sat, Nov 3, 2018 at 6:15 AM Roman Danyliw <rdd@cert.org> wrote:
> [..]
> (1) [telemetry system]->[orchestrator]: DOTS Mitigation Request
> (2) [network admin]->[orchestrator]: DOTS Mitigation Request
> (3) [orchestrator]->[routers/switch]: BGP redirect mitigation
> (4) [DMS]->[orchestrator]: DOTS Mitigation Request
> (5) [orchestrator]->[routers/switch]: BGP redirect mitigation
>
> ** If the orchestrator tasked the routers/switches per (3) to handle
> the attack traffic, how did the DMS get involved in the mitigation?
> What's the difference between the attack traffic handled by (3)
> and the DMS?  How is that coordination happening?

1) I'm not the author of the draft, but as far as I understand it the
use case is as follows (and you might want to take that with a grain
of salt):

Actually, the orchestrator doesn't ask for handling the *attack*
traffic during the step 3. At this point, routers still have no clue
about what's the attack traffic is (they only know who's the target,
as reported by the telemetry system), so they just start routing *all*
of the inbound traffic (including legitimate one) coming towards the
target IP address or IP prefix, via the DMS.

2) Going through the same paragraph, I'm a little bit concerned about
the "top-talker" part. Under most conditions and assuming most common
mitigation boxes, it's either useless or even dangerous to do that
during a volume-based DDoS attack. I'd suggest to put, e.g., an
amplification example here, with port blocking done instead of IP
address blocking.

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From: "Dobbins, Roland" <Roland.Dobbins@netscout.com>
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Thread-Topic: [Dots] Workflow question about draft-h-dots-mitigation-offload-expansion-00
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From: Yuhei Hayashi <hayashi.yuhei@lab.ntt.co.jp>
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Subject: Re: [Dots] Dots Digest, Vol 45, Issue 3
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Hi, all

Thank you for comments and feedback.

> ** After the telemetry system makes the mitigation request in (1), will the orchestrator block on a response awaiting for action from the network administrator (as the text notes that the 'network administrator' will confirm the request)? 
[Yuhei]
It's just my mistake.
I want to express that request (1) or (2) can be selected by the network's policy as below.

<alt> [triggered by telemetry/monitoring system]
      (1)[telemetry system]->[orchestrator]: DOTS Mitigation Request
      
      [triggered by network administrator]
      (2)[network admin]->[orchestrator]: DOTS Mitigation Request

> ** Is there an implicit out-of-band channel between the orchestrator and network admins to enable (2)?  
[Yuhei]
Yes.

> Why does the network admin have to be a DOTS client rather than a function in the orchestrator (out of scope for DOTS)?
[Yuhei]
I referred the current use-case draft, and it describes use case (fig. 4) where network admin has DOTS client functionality.
https://www.ietf.org/id/draft-ietf-dots-use-cases-16.txt

Hence, I described so, however, I also think it can be a function of orchestrator.

> ** Will the mitigation status requests back to the telemetry system and network admins in (1) and (2) be the same? 
[Yuhei]
Yes.

> ** Is the traffic examined by the DMS the same as seen by the telemetry systems?
[Yuhei]
Yes.

> How was the DMS tasked to examine the traffic -- was that an implicit communication channel from the orchestrator
> ** If the orchestrator tasked the routers/switches per (3) to handle the attack traffic, how did the DMS get involved in the mitigation?  What's the difference between the attack traffic handled by (3) and the DMS?  How is that coordination happening? 
[Yuhei]
Töma's opinion is correct for me.
> Actually, the orchestrator doesn't ask for handling the *attack*
> traffic during the step 3. At this point, routers still have no clue
> about what's the attack traffic is (they only know who's the target,
> as reported by the telemetry system), so they just start routing *all*
> of the inbound traffic (including legitimate one) coming towards the
> target IP address or IP prefix, via the DMS.

After request (3), DMS examines the suspicious traffic redirected by the routers, with information of target IP address or IP prefix reported by DOTS client.

> This draft is a) [imperfectly] duplicative of existing functionality 
> such as flowspec 
[Yuhei]
What I'd like to propose is to use DOTS protocol, not flowspec, in  "(4) [DMS]->[orchestrator]: DOTS Mitigation Request".
And I'd like DOTS client to send attacker information at the time to filter attack traffic correctly at "(5) [orchestrator]->[routers/switch]".

In the current DOTS specification, sending attacker information is out of scope, so I’d like to expand it.

> and b) in need of further consideration and refinement, 
> IMHO.
> Suggest strongly that additional contributors with relevant technical 
> and operational experience should be involved in re-working this draft 
> from a conceptual level onwards.
[Yuhei]
I'm searching those who has same concepts or requirements that DOTS client send attacker information by signal channel.

We are looking for more proponents of this draft, and are under discussion with some DOTS folks.
Actually, I received some positive feedback and I believe that this proposal useful for further work of DOTS-WG.

Thanks,
Yuhei


On 2018/11/04 4:00, dots-request@ietf.org wrote:
> Send Dots mailing list submissions to
> 	dots@ietf.org
> 
> To subscribe or unsubscribe via the World Wide Web, visit
> 	https://www.ietf.org/mailman/listinfo/dots
> or, via email, send a message with subject or body 'help' to
> 	dots-request@ietf.org
> 
> You can reach the person managing the list at
> 	dots-owner@ietf.org
> 
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Dots digest..."
> 
> 
> 
> Today's Topics:
> 
>     1. Workflow question about
>        draft-h-dots-mitigation-offload-expansion-00 (Roman Danyliw)
>     2. Re: Workflow question about
>        draft-h-dots-mitigation-offload-expansion-00 (T?ma Gavrichenkov)
>     3. Re: Workflow question about
>        draft-h-dots-mitigation-offload-expansion-00 (Dobbins, Roland)
> 
> 
> 
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
> 
-----------------------------------------
Nippon Telegraph and Telephone Corporation
  Network Service Systems Laboratories
   Transport Service Platform Innovation Project
    Transport Service Systems Development Project
     Yuhei Hayashi
0422-59-3485
hayashi.yuhei@lab.ntt.co.jp


From nobody Mon Nov  5 08:48:02 2018
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To: Yuhei Hayashi <hayashi.yuhei@lab.ntt.co.jp>, dots@ietf.org
References: <mailman.84.1541271619.8736.dots@ietf.org> <f3a508b0-1ff0-4d77-2023-2263dd7db78f@lab.ntt.co.jp>
From: kaname nishizuka <kaname@nttv6.jp>
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Subject: Re: [Dots] Dots Digest, Vol 45, Issue 3
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Hi Yuhei,

I'd advise you to keep the thread of discussions for readability and traceability (don't mix replies in one mail).
I can't see you're replying to whom.

Then, here is my comment:
The proposal of this draft is adding source IP address information in the signal channel.
Sometimes source IP address information is important, sometimes not.
I'd like to list up the cases source IP address information is useful (or not).

# useful protection with source IP address
Given source IP addresses of an attack is clear from a vantage point of an ISP:
  1. The attack is coming from a few number of specific source IP addresses
      - call home usecase can be classified here?
  2. The attack is coming from a particular group of source IP addresses
      - there could be some bias in distribution of attack sources of an AMP attack.

# the cases a protection with source IP address is not useful
  1. source IP addresses are spoofed(randomize)
      - source IP addresses are time varying
  2. widely distributed AMP attack with thousands of amplifying devices
      - stopping only a few of them is not effective


thanks,
Kaname



On 2018/11/05 11:12, Yuhei Hayashi wrote:
> Hi, all
>
> Thank you for comments and feedback.
>
>> ** After the telemetry system makes the mitigation request in (1), will the orchestrator block on a response awaiting for action from the network administrator (as the text notes that the 'network administrator' will confirm the request)? 
> [Yuhei]
> It's just my mistake.
> I want to express that request (1) or (2) can be selected by the network's policy as below.
>
> <alt> [triggered by telemetry/monitoring system]
>      (1)[telemetry system]->[orchestrator]: DOTS Mitigation Request
>           [triggered by network administrator]
>      (2)[network admin]->[orchestrator]: DOTS Mitigation Request
>
>> ** Is there an implicit out-of-band channel between the orchestrator and network admins to enable (2)? 
> [Yuhei]
> Yes.
>
>> Why does the network admin have to be a DOTS client rather than a function in the orchestrator (out of scope for DOTS)?
> [Yuhei]
> I referred the current use-case draft, and it describes use case (fig. 4) where network admin has DOTS client functionality.
> https://www.ietf.org/id/draft-ietf-dots-use-cases-16.txt
>
> Hence, I described so, however, I also think it can be a function of orchestrator.
>
>> ** Will the mitigation status requests back to the telemetry system and network admins in (1) and (2) be the same? 
> [Yuhei]
> Yes.
>
>> ** Is the traffic examined by the DMS the same as seen by the telemetry systems?
> [Yuhei]
> Yes.
>
>> How was the DMS tasked to examine the traffic -- was that an implicit communication channel from the orchestrator
>> ** If the orchestrator tasked the routers/switches per (3) to handle the attack traffic, how did the DMS get involved in the mitigation?  What's the difference between the attack traffic handled by (3) and the DMS?  How is that coordination happening? 
> [Yuhei]
> Töma's opinion is correct for me.
>> Actually, the orchestrator doesn't ask for handling the *attack*
>> traffic during the step 3. At this point, routers still have no clue
>> about what's the attack traffic is (they only know who's the target,
>> as reported by the telemetry system), so they just start routing *all*
>> of the inbound traffic (including legitimate one) coming towards the
>> target IP address or IP prefix, via the DMS.
>
> After request (3), DMS examines the suspicious traffic redirected by the routers, with information of target IP address or IP prefix reported by DOTS client.
>
>> This draft is a) [imperfectly] duplicative of existing functionality such as flowspec 
> [Yuhei]
> What I'd like to propose is to use DOTS protocol, not flowspec, in  "(4) [DMS]->[orchestrator]: DOTS Mitigation Request".
> And I'd like DOTS client to send attacker information at the time to filter attack traffic correctly at "(5) [orchestrator]->[routers/switch]".
>
> In the current DOTS specification, sending attacker information is out of scope, so I’d like to expand it.
>
>> and b) in need of further consideration and refinement, IMHO.
>> Suggest strongly that additional contributors with relevant technical and operational experience should be involved in re-working this draft from a conceptual level onwards.
> [Yuhei]
> I'm searching those who has same concepts or requirements that DOTS client send attacker information by signal channel.
>
> We are looking for more proponents of this draft, and are under discussion with some DOTS folks.
> Actually, I received some positive feedback and I believe that this proposal useful for further work of DOTS-WG.
>
> Thanks,
> Yuhei
>
>
> On 2018/11/04 4:00, dots-request@ietf.org wrote:
>> Send Dots mailing list submissions to
>>     dots@ietf.org
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>>     https://www.ietf.org/mailman/listinfo/dots
>> or, via email, send a message with subject or body 'help' to
>>     dots-request@ietf.org
>>
>> You can reach the person managing the list at
>>     dots-owner@ietf.org
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of Dots digest..."
>>
>>
>>
>> Today's Topics:
>>
>>     1. Workflow question about
>>        draft-h-dots-mitigation-offload-expansion-00 (Roman Danyliw)
>>     2. Re: Workflow question about
>>        draft-h-dots-mitigation-offload-expansion-00 (T?ma Gavrichenkov)
>>     3. Re: Workflow question about
>>        draft-h-dots-mitigation-offload-expansion-00 (Dobbins, Roland)
>>
>>
>>
>> _______________________________________________
>> Dots mailing list
>> Dots@ietf.org
>> https://www.ietf.org/mailman/listinfo/dots
>>
> -----------------------------------------
> Nippon Telegraph and Telephone Corporation
>  Network Service Systems Laboratories
>   Transport Service Platform Innovation Project
>    Transport Service Systems Development Project
>     Yuhei Hayashi
> 0422-59-3485
> hayashi.yuhei@lab.ntt.co.jp
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Tue Nov  6 22:29:41 2018
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Subject: [Dots] Milestones changed for dots WG
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Changed milestone "Architecture document to WGLC", set due date to November
2018 from March 2018.

URL: https://datatracker.ietf.org/wg/dots/about/


From nobody Wed Nov  7 09:02:38 2018
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Thread-Topic: Protocol Action: 'Network Access Control List (ACL) YANG Data Model' to Proposed Standard (draft-ietf-netmod-acl-model-21.txt)
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Date: Wed, 7 Nov 2018 17:02:31 +0000
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Subject: [Dots] TR: Protocol Action: 'Network Access Control List (ACL) YANG Data Model' to Proposed Standard (draft-ietf-netmod-acl-model-21.txt)
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From: <mohamed.boucadair@orange.com>
To: kaname nishizuka <kaname@nttv6.jp>, "Jon Shallow (supjps-ietf@jpshallow.com)" <supjps-ietf@jpshallow.com>
CC: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: Bangkok interop: control data channel filtering via signal channel
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Subject: [Dots] Bangkok interop: control data channel filtering via signal channel
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--_000_787AE7BB302AE849A7480A190F8B93302E042C45OPEXCLILMA3corp_
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Hi Kaname, Jon,

Thank you both for the great effort to make this happen. Greatly appreciate=
d!

The conclusion from reading the report slides is there is no broken part in=
 the spec. This is a cool news.

The point raised about controlling filtering via the signal channel is an i=
nteresting one.

>From where I sit, I do think this can be worked out separately from the bas=
e signal/data channel specs to give us more time to scope the issue and dis=
cuss whether/how to fix it. For example, there are some architectural consi=
derations that need to e discussed given that the signal and data channel m=
ay not be terminated on the same server.

Cheers,
Med




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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Hi Kaname, Jon,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Thank you both for the great effort to make=
 this happen. Greatly appreciated!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">The conclusion from reading the report slid=
es is there is no broken part in the spec. This is a cool news.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">The point raised about controlling filterin=
g via the signal channel is an interesting one.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">From where I sit, I do think this can be wo=
rked out separately from the base signal/data channel specs to give us more=
 time to scope the issue and discuss whether/how
 to fix it. For example, there are some architectural considerations that n=
eed to e discussed given that the signal and data channel may not be termin=
ated on the same server.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Med<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
</body>
</html>

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From: <mohamed.boucadair@orange.com>
To: "Panwei (William) (william.panwei@huawei.com)" <william.panwei@huawei.com>
CC: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: call-Home: Identification of the CPE when an on-path NAT
Thread-Index: AdR4B9D3EgloP+x7Q3CYe1K0EJt0PQ==
Date: Fri, 9 Nov 2018 08:40:07 +0000
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Subject: [Dots] call-Home: Identification of the CPE when an on-path NAT
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Hi Wei,

You raised a comment about CPE identification when a NAT is present on path=
. I guess you are referring to the general issue discussed in : https://too=
ls.ietf.org/html/rfc7620

In the particular case of call home, we assume that the access provider is =
the one providing the DOTS service. That is, if there is an address sharing=
 mechanism (not only a basic NAT), that mechanism is also controlled by the=
 same provider providing the DOTS server.

The correlation between external and internal reals can be achieved by a va=
riety of means. For example, the use of the NETCONF/YANG (https://tools.iet=
f.org/html/draft-ietf-opsawg-nat-yang) or the access of the NAT MIB (RFC765=
9) allow to correlate both the internal and external realms, and therefore =
identify the appropriate CPE.

Please let us know If this clarifies your concern. Thank you.

We can update the draft to record this point.

Cheers,
Med



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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Hi Wei,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">You raised a comment about CPE identificati=
on when a NAT is present on path. I guess you are referring to the general =
issue discussed in&nbsp;:
<a href=3D"https://tools.ietf.org/html/rfc7620">https://tools.ietf.org/html=
/rfc7620</a>
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">In the particular case of call home, we ass=
ume that the access provider is the one providing the DOTS service. That is=
, if there is an address sharing mechanism (not
 only a basic NAT), that mechanism is also controlled by the same provider =
providing the DOTS server.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">The correlation between external and intern=
al reals can be achieved by a variety of means. For example, the use of the=
 NETCONF/YANG (<a href=3D"https://tools.ietf.org/html/draft-ietf-opsawg-nat=
-yang">https://tools.ietf.org/html/draft-ietf-opsawg-nat-yang</a>)
 or the access of the NAT MIB (RFC7659) allow to correlate both the interna=
l and external realms, and therefore identify the appropriate CPE.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Please let us know If this clarifies your c=
oncern. Thank you.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">We can update the draft to record this poin=
t.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Med<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
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From: <mohamed.boucadair@orange.com>
To: "Xialiang (Frank, Network Integration Technology Research Dept)" <frank.xialiang@huawei.com>
CC: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: call home: DOTS server on a CPE
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Hi Franck,

You raised a comment about the implication of embedding a DOTS server on a =
CPE.

In the past, the WG discussed use cases in which a CPE embeds a DOTS gatewa=
y...which is by definition a DOTS client and servers put back to back. So, =
even with the "classic" DOTS scenarios, there are cases where the CPE can e=
mbed a DOTS server component. This is thus no specific to the call home sce=
nario.

That is said, the DOTS server to be embedded in a CPE won't be as sophistic=
ated as the one deployed on provider side.

Cheers,
Med



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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Hi Franck,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">You raised a comment about the implication =
of embedding a DOTS server on a CPE.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">In the past, the WG discussed use cases in =
which a CPE embeds a DOTS gateway&#8230;which is by definition a DOTS clien=
t and servers put back to back. So, even with the &#8220;classic&#8221;
 DOTS scenarios, there are cases where the CPE can embed a DOTS server comp=
onent. This is thus no specific to the call home scenario.<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">That is said, the DOTS server to be embedde=
d in a CPE won&#8217;t be as sophisticated as the one deployed on provider =
side.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Med
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
</div>
</body>
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From nobody Fri Nov  9 00:52:11 2018
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From: <mohamed.boucadair@orange.com>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: call-home: Call for other scenarios for filtering near sources
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Date: Fri, 9 Nov 2018 08:52:05 +0000
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Subject: [Dots] call-home: Call for other scenarios for filtering near sources
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Hi all,

Franck and Wei mentioned that the call home feature can be useful in other =
scenarios such as DCs.

I do fully agree with that comment. Hence this call to share your favorite =
scenarios for filtering near the sources.

We will be more than delighted to include them in the draft.

Thank you.

Cheers,
Med

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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Hi all,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Franck and Wei mentioned that the call home=
 feature can be useful in other scenarios such as DCs.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">I do fully agree with that comment. Hence t=
his call to share your favorite scenarios for filtering near the sources.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">We will be more than delighted to include t=
hem in the draft.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Thank you.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;">Med<o:p></o:p></span></p>
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--_000_787AE7BB302AE849A7480A190F8B93302E042D27OPEXCLILMA3corp_--


From nobody Fri Nov  9 01:18:31 2018
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Subject: Re: [Dots] call home: DOTS server on a CPE
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Subject: Re: [Dots] Bangkok interop: control data channel filtering via signal channel
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "kaname nishizuka" <kaname@nttv6.jp>, "Jon Shallow (supjps-ietf@jpshallow.com)" <supjps-ietf@jpshallow.com>
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Thread-Topic: Bangkok interop: control data channel filtering via signal channel
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Subject: Re: [Dots] Bangkok interop: control data channel filtering via signal channel
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To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "kaname nishizuka" <kaname@nttv6.jp>, "Jon Shallow (supjps-ietf@jpshallow.com)" <supjps-ietf@jpshallow.com>
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Subject: Re: [Dots] Bangkok interop: control data channel filtering via signal channel
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "dots@ietf.org" <dots@ietf.org>
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Subject: Re: [Dots] call-home: Call for other scenarios for filtering near sources
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Xialiang (Frank, Network Integration Technology Research Dept)" <frank.xialiang@huawei.com>
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: call-home: Call for other scenarios for filtering near sources
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "dots@ietf.org" <dots@ietf.org>
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: call-home: Call for other scenarios for filtering near sources
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Date: Fri, 9 Nov 2018 13:32:40 +0000
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Subject: Re: [Dots] call-home: Call for other scenarios for filtering near sources
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From: kaname nishizuka <kaname@nttv6.jp>
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Subject: Re: [Dots] Bangkok interop: control data channel filtering via signal channel
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 > a separate draft discussing the problem and update to DOTS protocols l=
ooks like a good way to proceed.
yes, I agree with this.
Then, I think we should start this new work right after the publication o=
f the base signal/data channel specs.

thanks,
Kaname

On 2018/11/09 20:01, Konda, Tirumaleswar Reddy wrote:
>
> Agreed, a separate draft discussing the problem and update to DOTS prot=
ocols looks like a good way to proceed.
>
> -Tiru
>
> *From:*mohamed.boucadair@orange.com <mohamed.boucadair@orange.com>
> *Sent:* Friday, November 9, 2018 3:26 PM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>; k=
aname nishizuka <kaname@nttv6.jp>; Jon Shallow (supjps-ietf@jpshallow.com=
) <supjps-ietf@jpshallow.com>
> *Cc:* dots@ietf.org
> *Subject:* RE: Bangkok interop: control data channel filtering via sign=
al channel
>
> *CAUTION*:External email. Do not click links or open attachments unless=
 you recognize the sender and know the content is safe.
>
> -----------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------
>
> Re-,
>
> Obviously.
>
> So far, we didn=E2=80=99t discussed/zoomed on that coordination. I=E2=80=
=99m not sure, and hence my proposal to leave this out of the base sepc, =
if there are gaps when it comes to gluing between what is initially gover=
ned by the signal channel and what is done via the data channel.
>
> Cheers,
>
> Med
>
> *De=C2=A0:*Konda, Tirumaleswar Reddy [mailto:TirumaleswarReddy_Konda@Mc=
Afee.com]
> *Envoy=C3=A9=C2=A0:* vendredi 9 novembre 2018 10:40
> *=C3=80=C2=A0:* BOUCADAIR Mohamed TGI/OLN; kaname nishizuka; Jon Shallo=
w (supjps-ietf@jpshallow.com <mailto:supjps-ietf@jpshallow.com>)
> *Cc=C2=A0:* dots@ietf.org <mailto:dots@ietf.org>
> *Objet=C2=A0:* RE: Bangkok interop: control data channel filtering via =
signal channel
>
> The scope of the mitigation request, alias and filtering rules is not r=
estricted to the DOTS server but to the DOTS server administrative domain=
, similar to using multiple SDN controllers coordinating their decisions =
in a domain.
>
> -Tiru
>
> *From:*Dots <dots-bounces@ietf.org <mailto:dots-bounces@ietf.org>> *On =
Behalf Of *mohamed.boucadair@orange.com <mailto:mohamed.boucadair@orange.=
com>
> *Sent:* Friday, November 9, 2018 1:37 PM
> *To:* kaname nishizuka <kaname@nttv6.jp <mailto:kaname@nttv6.jp>>; Jon =
Shallow (supjps-ietf@jpshallow.com <mailto:supjps-ietf@jpshallow.com>) <s=
upjps-ietf@jpshallow.com <mailto:supjps-ietf@jpshallow.com>>
> *Cc:* dots@ietf.org <mailto:dots@ietf.org>
> *Subject:* [Dots] Bangkok interop: control data channel filtering via s=
ignal channel
>
> *CAUTION*:External email. Do not click links or open attachments unless=
 you recognize the sender and know the content is safe.
>
> -----------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------
>
> Hi Kaname, Jon,
>
> Thank you both for the great effort to make this happen. Greatly apprec=
iated!
>
> The conclusion from reading the report slides is there is no broken par=
t in the spec. This is a cool news.
>
> The point raised about controlling filtering via the signal channel is =
an interesting one.
>
> From where I sit, I do think this can be worked out separately from the=
 base signal/data channel specs to give us more time to scope the issue a=
nd discuss whether/how to fix it. For example, there are some architectur=
al considerations that need to e discussed given that the signal and data=
 channel may not be terminated on the same server.
>
> Cheers,
>
> Med
>


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    <br>
    &gt; <span style="mso-fareast-language:ZH-CN">a separate draft
      discussing the problem and update to DOTS protocols looks like a
      good way to proceed.</span><br>
    yes, I agree with this.<br>
    Then, I think we should start this new work right after the
    publication of the base signal/data channel specs.<br>
    <br>
    thanks,<br>
    Kaname<br>
    <br>
    <div class="moz-cite-prefix">On 2018/11/09 20:01, Konda,
      Tirumaleswar Reddy wrote:<br>
    </div>
    <blockquote type="cite"
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      <div class="WordSection1">
        <p class="MsoNormal"><span style="mso-fareast-language:ZH-CN">Agreed,
            a separate draft discussing the problem and update to DOTS
            protocols looks like a good way to proceed.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:ZH-CN"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:ZH-CN">-Tiru<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:ZH-CN"><o:p> </o:p></span></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
                    style="mso-fareast-language:ZH-CN">From:</span></b><span
                  style="mso-fareast-language:ZH-CN">
                  <a class="moz-txt-link-abbreviated" href="mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com</a>
                  <a class="moz-txt-link-rfc2396E" href="mailto:mohamed.boucadair@orange.com">&lt;mohamed.boucadair@orange.com&gt;</a>
                  <br>
                  <b>Sent:</b> Friday, November 9, 2018 3:26 PM<br>
                  <b>To:</b> Konda, Tirumaleswar Reddy
                  <a class="moz-txt-link-rfc2396E" href="mailto:TirumaleswarReddy_Konda@McAfee.com">&lt;TirumaleswarReddy_Konda@McAfee.com&gt;</a>; kaname
                  nishizuka <a class="moz-txt-link-rfc2396E" href="mailto:kaname@nttv6.jp">&lt;kaname@nttv6.jp&gt;</a>; Jon Shallow
                  (<a class="moz-txt-link-abbreviated" href="mailto:supjps-ietf@jpshallow.com">supjps-ietf@jpshallow.com</a>)
                  <a class="moz-txt-link-rfc2396E" href="mailto:supjps-ietf@jpshallow.com">&lt;supjps-ietf@jpshallow.com&gt;</a><br>
                  <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:dots@ietf.org">dots@ietf.org</a><br>
                  <b>Subject:</b> RE: Bangkok interop: control data
                  channel filtering via signal channel<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <div>
            <table class="MsoNormalTable"
              style="background:#F3FF33;border:solid #9B9A87 1.5pt"
              cellpadding="0" border="1">
              <tbody>
                <tr>
                  <td style="border:none;padding:.75pt .75pt .75pt
                    .75pt">
                    <p><strong><span
                          style="font-family:&quot;Arial&quot;,sans-serif;color:#9B8B3E">CAUTION</span></strong><span
style="font-family:&quot;Arial&quot;,sans-serif;color:#9B8B3E">:</span><span
style="font-family:&quot;Arial&quot;,sans-serif;color:black"> External
                        email. Do not click links or open attachments
                        unless you recognize the sender and know the
                        content is safe.</span><span
                        style="font-family:&quot;Arial&quot;,sans-serif"><o:p></o:p></span></p>
                  </td>
                </tr>
              </tbody>
            </table>
            <div class="MsoNormal" style="text-align:center"
              align="center"><span style="mso-fareast-language:ZH-CN"
                lang="FR">
                <hr align="center" size="2" width="100%">
              </span></div>
          </div>
          <p class="MsoNormal"><span
              style="font-size:10.0pt;font-family:&quot;Courier
              New&quot;;color:black" lang="FR">Re-,<o:p></o:p></span></p>
          <p class="MsoNormal"><span
              style="font-size:10.0pt;font-family:&quot;Courier
              New&quot;;color:black" lang="FR"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
              style="font-size:10.0pt;font-family:&quot;Courier
              New&quot;;color:black">Obviously.
              <o:p></o:p></span></p>
          <p class="MsoNormal"><span
              style="font-size:10.0pt;font-family:&quot;Courier
              New&quot;;color:black"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
              style="font-size:10.0pt;font-family:&quot;Courier
              New&quot;;color:black">So far, we didn’t discussed/zoomed
              on that coordination. I’m not sure, and hence my proposal
              to leave this out of the base sepc, if there are gaps when
              it comes to gluing between what is initially governed by
              the signal channel and what is done via the data channel.
              <o:p></o:p></span></p>
          <p class="MsoNormal"><span
              style="font-size:10.0pt;font-family:&quot;Courier
              New&quot;;color:black"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
              style="font-size:10.0pt;font-family:&quot;Courier
              New&quot;;color:black">Cheers,<o:p></o:p></span></p>
          <p class="MsoNormal"><span
              style="font-size:10.0pt;font-family:&quot;Courier
              New&quot;;color:black">Med<o:p></o:p></span></p>
          <p class="MsoNormal"><span
              style="font-size:10.0pt;font-family:&quot;Courier
              New&quot;;color:black"><o:p> </o:p></span></p>
          <div style="border:none;border-left:solid blue
            1.5pt;padding:0in 0in 0in 4.0pt">
            <div>
              <div style="border:none;border-top:solid #B5C4DF
                1.0pt;padding:3.0pt 0in 0in 0in">
                <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;mso-fareast-language:FR"
                      lang="FR">De :</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;mso-fareast-language:FR"
                    lang="FR"> Konda, Tirumaleswar Reddy [<a
                      href="mailto:TirumaleswarReddy_Konda@McAfee.com"
                      moz-do-not-send="true">mailto:TirumaleswarReddy_Konda@McAfee.com</a>]
                    <br>
                    <b>Envoyé :</b> vendredi 9 novembre 2018 10:40<br>
                    <b>À :</b> BOUCADAIR Mohamed TGI/OLN; kaname
                    nishizuka; Jon Shallow (<a
                      href="mailto:supjps-ietf@jpshallow.com"
                      moz-do-not-send="true">supjps-ietf@jpshallow.com</a>)<br>
                    <b>Cc :</b> <a href="mailto:dots@ietf.org"
                      moz-do-not-send="true">dots@ietf.org</a><br>
                    <b>Objet :</b> RE: Bangkok interop: control data
                    channel filtering via signal channel<o:p></o:p></span></p>
              </div>
            </div>
            <p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
            <p class="MsoNormal"><span
                style="mso-fareast-language:ZH-CN">The scope of the
                mitigation request, alias and filtering rules is not
                restricted to the DOTS server but to the DOTS server
                administrative domain, similar to using multiple SDN
                controllers coordinating their decisions in a domain. <o:p></o:p></span></p>
            <p class="MsoNormal"><span
                style="mso-fareast-language:ZH-CN"><o:p> </o:p></span></p>
            <p class="MsoNormal"><span
                style="mso-fareast-language:ZH-CN">-Tiru<o:p></o:p></span></p>
            <p class="MsoNormal"><span
                style="mso-fareast-language:ZH-CN"><o:p> </o:p></span></p>
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div style="border:none;border-top:solid #E1E1E1
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"><b><span
                        style="mso-fareast-language:ZH-CN">From:</span></b><span
                      style="mso-fareast-language:ZH-CN"> Dots &lt;<a
                        href="mailto:dots-bounces@ietf.org"
                        moz-do-not-send="true">dots-bounces@ietf.org</a>&gt;
                      <b>On Behalf Of </b><a
                        href="mailto:mohamed.boucadair@orange.com"
                        moz-do-not-send="true">mohamed.boucadair@orange.com</a><br>
                      <b>Sent:</b> Friday, November 9, 2018 1:37 PM<br>
                      <b>To:</b> kaname nishizuka &lt;<a
                        href="mailto:kaname@nttv6.jp"
                        moz-do-not-send="true">kaname@nttv6.jp</a>&gt;;
                      Jon Shallow (<a
                        href="mailto:supjps-ietf@jpshallow.com"
                        moz-do-not-send="true">supjps-ietf@jpshallow.com</a>)
                      &lt;<a href="mailto:supjps-ietf@jpshallow.com"
                        moz-do-not-send="true">supjps-ietf@jpshallow.com</a>&gt;<br>
                      <b>Cc:</b> <a href="mailto:dots@ietf.org"
                        moz-do-not-send="true">dots@ietf.org</a><br>
                      <b>Subject:</b> [Dots] Bangkok interop: control
                      data channel filtering via signal channel<o:p></o:p></span></p>
                </div>
              </div>
              <p class="MsoNormal"><o:p> </o:p></p>
              <div>
                <table class="MsoNormalTable"
                  style="background:#F3FF33;border:solid #9B9A87 1.5pt"
                  cellpadding="0" border="1">
                  <tbody>
                    <tr>
                      <td style="border:none;padding:.75pt .75pt .75pt
                        .75pt">
                        <p><strong><span
                              style="font-family:&quot;Arial&quot;,sans-serif;color:#9B8B3E">CAUTION</span></strong><span
style="font-family:&quot;Arial&quot;,sans-serif;color:#9B8B3E">:</span><span
style="font-family:&quot;Arial&quot;,sans-serif;color:black"> External
                            email. Do not click links or open
                            attachments unless you recognize the sender
                            and know the content is safe.</span><span
                            style="font-family:&quot;Arial&quot;,sans-serif"><o:p></o:p></span></p>
                      </td>
                    </tr>
                  </tbody>
                </table>
                <div class="MsoNormal" style="text-align:center"
                  align="center"><span
                    style="mso-fareast-language:ZH-CN" lang="FR">
                    <hr align="center" size="2" width="100%">
                  </span></div>
              </div>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">Hi Kaname, Jon,
                  <o:p></o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">Thank you both for the great effort to make
                  this happen. Greatly appreciated!<o:p></o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">The conclusion from reading the report
                  slides is there is no broken part in the spec. This is
                  a cool news.
                  <o:p></o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">The point raised about controlling
                  filtering via the signal channel is an interesting
                  one.
                  <o:p></o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">From where I sit, I do think this can be
                  worked out separately from the base signal/data
                  channel specs to give us more time to scope the issue
                  and discuss whether/how to fix it. For example, there
                  are some architectural considerations that need to e
                  discussed given that the signal and data channel may
                  not be terminated on the same server.
                  <o:p></o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">Cheers,<o:p></o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">Med<o:p></o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

--------------71985037F9DFED27837A8C14--


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Subject: Re: [Dots] Bangkok interop: control data channel filtering via signal channel
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From: Roman Danyliw <rdd@cert.org>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "kaname nishizuka" <kaname@nttv6.jp>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Jon Shallow (supjps-ietf@jpshallow.com)" <supjps-ietf@jpshallow.com>
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Thread-Topic: [Dots] Bangkok interop: control data channel filtering via signal channel
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To: Roman Danyliw <rdd@cert.org>, "Xialiang (Frank, Network Integration Technology Research Dept)" <frank.xialiang@huawei.com>, "Panwei (William) (william.panwei@huawei.com)" <william.panwei@huawei.com>
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Thread-Topic: New Version Notification for draft-reddy-dots-home-network-02.txt
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From nobody Wed Nov 14 10:10:26 2018
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From: Robert Sparks <rjsparks@nostrum.com>
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Subject: [Dots] Genart last call review of draft-ietf-dots-requirements-16
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Reviewer: Robert Sparks
Review result: Ready

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at

<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-dots-requirements-16
Reviewer: Robert Sparks
Review Date: 2018-11-14
IETF LC End Date: 2018-11-23
IESG Telechat date: Not scheduled for a telechat

Summary: Ready for publication as an Informational RFC, but with nits to
consider before publication

Biggest Nit:

In DM-004, you point to SIG-007 where you mean to point to SIG-008. The rest of
the internal references should be inspected to make sure they haven't drifted
as the document evolved.

The rest are all really small polishing nits:

Nits:

Section 1.1 third paragraph, second sentence: This sentence doesn't scan well
(the page break in -16 may hide that). Eliding words to highlight the issue in
the structure : "Such ... interfaces tie ... while also limiting ...". One
possible adjustment would be "Such proprietary interfaces tie a subscriber to a
service and limit the abilities of network elements that would otherwise be
capable of participating in attack mitigation".  That said, the paragraph is
just as effective if you simply delete the sentence.

Section 1.2, definition of "DOTS gateway". This description does not admit the
notion of an aggregating gateway as described in the architecture document. As
this is the _definition_ the architecture document points to, and is being
published as part of an introduction to DOTS, it should be adjusted.

Section 2 paragraph 2: This paragraph is written as a description of protocols
that already exist instead of as requirements. The rest of the section uses
more of a requirements framing.

Section 2.1, GEN-001: "operational and proprietary" scans oddly. almost an
apples and oranges kind of mismatch. There are operational defenses that are
proprietary. 

Paragraph 3 of SEC-002: This paragraph doesn't read as sensibly when you have
the pictures of aggregating gateways from the architecture document in mind.
Does it constrain the types of connections that can be aggregated to those that
share equivalent security properties? If so, it should be explicit.

DM-007 implies that the ability for a client to express acceptable loss is
described in GEN-002. GEN-002 is only a requirement about resiliency - it
mentions resiliency against loss, but is silent about acceptable loss, so it's
not clear what the "as described in" in this requirement is really pointing to.

It is unclear what DM-009 is trying to constrain/accomplish. I think it is
trying to say you MUST NOT bake _assumptions_ about specific characteristics of
any given transport into the data model, but instead, you must model them
explicitly. Please adjust the requirement to clarify.

MicroNits:

Section 1.1 first paragraph: "networks of all kinds" overreaches as written.
There are networks (isolated LANs for example) that are not so afflictable.

Section 1.2, definition of "DDoS attack target": The phrase "with a finite set
of resources, such as network bandwidth, memory, or CPU," is unnecessary. All
network connected entities have finite resources. I suggest deleting the
phrase. If you really want to retain it, say something like "more constrained
than some other actor".

Section 1.2, definition of "DOTS signal": "concise" is unnecessary in the
definition, and comes off as solution rather than requirement. You already do a
good job of motivating the need for parsimonious message sizes in the
requirements part of the document.



From nobody Sat Nov 17 01:16:09 2018
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From: Roman Danyliw <rdd@cert.org>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: Draft IETF 103 minutes available
Thread-Index: AdR+VMvnlZUx9UbwT9OWwQaGaetGXA==
Date: Sat, 17 Nov 2018 09:16:00 +0000
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Hello!

Thanks to Wei Pan, a preliminary version of the minutes from the Bangkok me=
eting are available at:

https://datatracker.ietf.org/meeting/103/materials/minutes-103-dots-00

If you have corrections or revisions, please provide it to the chairs.

Regards,
Roman and Frank


From nobody Sat Nov 17 17:39:23 2018
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From: Joseph Touch <touch@strayalpha.com>
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Subject: [Dots] Tsvart last call review of draft-ietf-dots-requirements-16
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Reviewer: Joseph Touch
Review result: Ready with Issues

Transport issues:
- The GEN requirements refer to signal and data channels; it should be more
clear that these would be transport associations or connections, not
necessarily separate port assignments - GEN-03 recommends transports that avoid
HOL blocking, but that blocking can occur at any protocol layer (e.g., when
using TCP as a tunneling layer or at the application layer) - SIG-001 – PLPMTUD
should be used instead of PMTUD; PMTUD (relying on ICMP, which is often blocked
and remains insecure) should be avoided. The PMTU of 1280 is relevant only for
IPv6. The use of 576 should be more clearly indicated as applying only to IPv4.
(note there is emerging PLPMTUD for UDP). - SIG-004 should address the use of
TCP keepalives for TCP connections as a way to achieve heartbeats. - SIG-004 is
self-contradictory, at first claiming that agents SHOULD avoid termination due
to heartbeat loss then later saying they MAY use heartbeat absence as
indication of defunct connections. Even though SHOULD and MAY can be used
together this way, the advise is confusing. This is a case (see below) where
the reasoning behind exceptions to SHOULDs are needed -- but the MAY clause is
a far too trivial (and, based on our experience with BGP, incorrect) condition
- DATA-002 should suggest protocols for security, at least indicating whether
these need to be at a particular protocol layer (IP, transport, application),
etc.

Other issues:
- the document uses SHOULD without qualifying the conditions for exception

Nits
- the abstract is too brief
- Several requirements suggest that use of TCP avoids the need for separate
congestion control; the same should be mentioned of SCTP and DCCP.



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Subject: Re: [Dots] Tsvart last call review of draft-ietf-dots-requirements-16
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--Apple-Mail=_8A50E553-D577-45F9-94B0-F37A66637E29
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Hi, all,
The following boilerplate was supposed to have been inserted =
automatically=E2=80=A6
Joe

=E2=80=94=E2=80=94
This document has been reviewed as part of the transport area review =
team's ongoing
effort to review key IETF documents. These comments were written =
primarily for
the transport area directors, but are copied to the document's authors =
and WG to=20
allow them to address any issues raised and also to the IETF discussion =
list for=20
information.=20

When done at the time of IETF Last Call, the authors should consider =
this
review as part of the last-call comments they receive. Please
always CC tsv-art@ietf.org <mailto:tsv-art@ietf..org> if you reply to or =
forward this review.
---

> On Nov 17, 2018, at 5:39 PM, Joseph Touch <touch@strayalpha.com> =
wrote:
>=20
> Reviewer: Joseph Touch
> Review result: Ready with Issues
>=20
> Transport issues:
> - The GEN requirements refer to signal and data channels; it should be =
more
> clear that these would be transport associations or connections, not
> necessarily separate port assignments - GEN-03 recommends transports =
that avoid
> HOL blocking, but that blocking can occur at any protocol layer (e.g., =
when
> using TCP as a tunneling layer or at the application layer) - SIG-001 =
=E2=80=93 PLPMTUD
> should be used instead of PMTUD; PMTUD (relying on ICMP, which is =
often blocked
> and remains insecure) should be avoided. The PMTU of 1280 is relevant =
only for
> IPv6. The use of 576 should be more clearly indicated as applying only =
to IPv4.
> (note there is emerging PLPMTUD for UDP). - SIG-004 should address the =
use of
> TCP keepalives for TCP connections as a way to achieve heartbeats. - =
SIG-004 is
> self-contradictory, at first claiming that agents SHOULD avoid =
termination due
> to heartbeat loss then later saying they MAY use heartbeat absence as
> indication of defunct connections. Even though SHOULD and MAY can be =
used
> together this way, the advise is confusing. This is a case (see below) =
where
> the reasoning behind exceptions to SHOULDs are needed -- but the MAY =
clause is
> a far too trivial (and, based on our experience with BGP, incorrect) =
condition
> - DATA-002 should suggest protocols for security, at least indicating =
whether
> these need to be at a particular protocol layer (IP, transport, =
application),
> etc.
>=20
> Other issues:
> - the document uses SHOULD without qualifying the conditions for =
exception
>=20
> Nits
> - the abstract is too brief
> - Several requirements suggest that use of TCP avoids the need for =
separate
> congestion control; the same should be mentioned of SCTP and DCCP.
>=20
>=20


--Apple-Mail=_8A50E553-D577-45F9-94B0-F37A66637E29
Content-Transfer-Encoding: quoted-printable
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hi, =
all,<div class=3D"">The following boilerplate was supposed to have been =
inserted automatically=E2=80=A6</div><div class=3D"">Joe</div><div =
class=3D""><br class=3D""></div><div class=3D"">=E2=80=94=E2=80=94</div><d=
iv class=3D""><pre style=3D"margin: 0cm 0cm 0.0001pt; font-size: 10pt; =
font-family: &quot;Courier New&quot;; background-color: rgb(255, 255, =
255);" class=3D"">This document has been reviewed as part of the =
transport area review team's ongoing</pre><pre style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
background-color: rgb(255, 255, 255);" class=3D"">effort to review key =
IETF documents. These comments were written primarily for</pre><pre =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; background-color: rgb(255, 255, 255);" =
class=3D"">the transport area directors, but are copied to the =
document's authors and WG to </pre><pre style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 10pt; font-family: &quot;Courier New&quot;; =
background-color: rgb(255, 255, 255);" class=3D"">allow them to address =
any issues raised and also to the IETF discussion list for </pre><pre =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; background-color: rgb(255, 255, 255);" =
class=3D"">information.=20

When done at the time of IETF Last Call, the authors should consider =
this
review as part of the last-call comments they receive. Please
always CC <a class=3D"moz-txt-link-abbreviated" =
href=3D"mailto:tsv-art@ietf..org" style=3D"color: =
purple;">tsv-art@ietf.org</a> if you reply to or forward this =
review.</pre><div class=3D"">---</div><div><br class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D"">On Nov 17, 2018, at 5:39 PM, =
Joseph Touch &lt;<a href=3D"mailto:touch@strayalpha.com" =
class=3D"">touch@strayalpha.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"">Reviewer: Joseph Touch<br class=3D"">Review result: Ready =
with Issues<br class=3D""><br class=3D"">Transport issues:<br class=3D"">-=
 The GEN requirements refer to signal and data channels; it should be =
more<br class=3D"">clear that these would be transport associations or =
connections, not<br class=3D"">necessarily separate port assignments - =
GEN-03 recommends transports that avoid<br class=3D"">HOL blocking, but =
that blocking can occur at any protocol layer (e.g., when<br =
class=3D"">using TCP as a tunneling layer or at the application layer) - =
SIG-001 =E2=80=93 PLPMTUD<br class=3D"">should be used instead of PMTUD; =
PMTUD (relying on ICMP, which is often blocked<br class=3D"">and remains =
insecure) should be avoided. The PMTU of 1280 is relevant only for<br =
class=3D"">IPv6. The use of 576 should be more clearly indicated as =
applying only to IPv4.<br class=3D"">(note there is emerging PLPMTUD for =
UDP). - SIG-004 should address the use of<br class=3D"">TCP keepalives =
for TCP connections as a way to achieve heartbeats. - SIG-004 is<br =
class=3D"">self-contradictory, at first claiming that agents SHOULD =
avoid termination due<br class=3D"">to heartbeat loss then later saying =
they MAY use heartbeat absence as<br class=3D"">indication of defunct =
connections. Even though SHOULD and MAY can be used<br class=3D"">together=
 this way, the advise is confusing. This is a case (see below) where<br =
class=3D"">the reasoning behind exceptions to SHOULDs are needed -- but =
the MAY clause is<br class=3D"">a far too trivial (and, based on our =
experience with BGP, incorrect) condition<br class=3D"">- DATA-002 =
should suggest protocols for security, at least indicating whether<br =
class=3D"">these need to be at a particular protocol layer (IP, =
transport, application),<br class=3D"">etc.<br class=3D""><br =
class=3D"">Other issues:<br class=3D"">- the document uses SHOULD =
without qualifying the conditions for exception<br class=3D""><br =
class=3D"">Nits<br class=3D"">- the abstract is too brief<br class=3D"">- =
Several requirements suggest that use of TCP avoids the need for =
separate<br class=3D"">congestion control; the same should be mentioned =
of SCTP and DCCP.<br class=3D""><br class=3D""><br =
class=3D""></div></div></blockquote></div><br =
class=3D""></div></body></html>=

--Apple-Mail=_8A50E553-D577-45F9-94B0-F37A66637E29--


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Date: Sun, 18 Nov 2018 13:07:49 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
To: dots@ietf.org
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Subject: [Dots] encoding of CBOR map integer keys for the signal channel
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Hi all,

I've finished my read through of the signal channel document and will have
a number of comments to write up on it.  Unfortunately, this week's
telechat is quite full so I'm deferring actually writing up the comments in
order to stay on track for telechat prep.  One issue that I noticed since
my last mail on this document relates to the integer key values for the
CBOR map (e.g., Table 4 and Table 6).

My understanding is that these integer keys are encoded as CBOR integral
types (major type values 0 and 1), using the variable-length encoding.  In
particular that means that nonnegative values less than 24 have a one-byte
encoding but larger values have longer encodings.  (Is this correct, and)
did the WG consider which parameters are more commonly used so as to give
them the smaller encodings?

(We could also use negative integers to get more choices with the smaller
encoding, since apparently we are not using the sign to distinguish
comprehension-required from comprehension-optional.)

-Ben


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Benjamin Kaduk <kaduk@mit.edu>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] encoding of CBOR map integer keys for the signal channel
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/VTEabOTzFeMGpXp5YKy3XmYZZnE>
Subject: Re: [Dots] encoding of CBOR map integer keys for the signal channel
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Hi Ben,

The CBOR key values are in the range 1 to 65535 (major type 0, with additio=
nal information 25 (uint16_t)), all the mitigation request parameters (exce=
pt attack-status and trigger-mitigation) are in the range 1 to 23.
We can move attack-status and trigger-mitigation parameters in the range of=
 0 to 23 to take advantage of the smaller encoding, and modify the key valu=
e range to 0 to 65535.=20

Cheers,
-Tiru

> -----Original Message-----
> From: Dots <dots-bounces@ietf.org> On Behalf Of Benjamin Kaduk
> Sent: Monday, November 19, 2018 12:38 AM
> To: dots@ietf.org
> Subject: [Dots] encoding of CBOR map integer keys for the signal channel
>=20
> This email originated from outside of the organization. Do not click link=
s or
> open attachments unless you recognize the sender and know the content is
> safe.
>=20
> Hi all,
>=20
> I've finished my read through of the signal channel document and will hav=
e a
> number of comments to write up on it.  Unfortunately, this week's telecha=
t
> is quite full so I'm deferring actually writing up the comments in order =
to
> stay on track for telechat prep.  One issue that I noticed since my last =
mail
> on this document relates to the integer key values for the CBOR map (e.g.=
,
> Table 4 and Table 6).
>=20
> My understanding is that these integer keys are encoded as CBOR integral
> types (major type values 0 and 1), using the variable-length encoding.  I=
n
> particular that means that nonnegative values less than 24 have a one-byt=
e
> encoding but larger values have longer encodings.  (Is this correct, and)=
 did
> the WG consider which parameters are more commonly used so as to give
> them the smaller encodings?
>=20
> (We could also use negative integers to get more choices with the smaller
> encoding, since apparently we are not using the sign to distinguish
> comprehension-required from comprehension-optional.)
>=20
> -Ben
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: Kathleen Moriarty <kathleen.moriarty.ietf@gmail.com>
Date: Mon, 19 Nov 2018 14:20:20 -0500
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Subject: [Dots] CARIS2 Workshop Call for Papers
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We are pleased to announce a call for papers (position paper or research
paper) for the Coordinating Attack Response at Internet Scale (CARIS) 2
workshop, sponsored by the Internet Society.  The workshop will take place
in Cambridge, MA February 28 - March 1, 2019 and we look forward to your
participation.

Additional information on the workshop can be found at the following link:
https://www.internetsociety.org/events/caris2

Paper submissions (minimum of 2 pages) are due 16 December 2018 for
consideration to attend the workshop.  Papers can be submitted through the
following link, which requires creating an account:
https://caris19.hotcrp.com/

-- 

Best regards,
Kathleen Moriarty and the workshop program committee

--00000000000090ee8f057b096a4c
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<div dir=3D"ltr">We are pleased to announce a call for papers (position pap=
er or research paper) for the Coordinating Attack Response at Internet Scal=
e (<span class=3D"gmail-il">CARIS</span>) 2 workshop, sponsored by the Inte=
rnet Society.=C2=A0 The workshop will take place in Cambridge, MA February =
28 - March 1, 2019 and we look forward to your participation.<div><br></div=
><div>Additional information on the workshop can be found at the following =
link:</div><div><a href=3D"https://www.internetsociety.org/events/caris2" r=
el=3D"noreferrer" target=3D"_blank">https://www.internetsociety.org/events/=
caris2</a></div><div><br></div><div>Paper submissions (minimum of 2 pages) =
are due 16 December 2018 for consideration to attend the workshop.=C2=A0 Pa=
pers can be submitted through the following link, which requires creating a=
n account:=C2=A0<a href=3D"https://caris19.hotcrp.com/" target=3D"_blank">h=
ttps://caris19.hotcrp.com/</a></div><div><br></div>-- <br><div dir=3D"ltr" =
class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"lt=
r"><br><div>Best regards,</div><div>Kathleen Moriarty and the workshop prog=
ram committee=C2=A0</div></div></div></div>

--00000000000090ee8f057b096a4c--


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Subject: [Dots] Fwd: I-D Action: draft-nishizuka-dots-signal-control-filtering-00.txt
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Hi,

Base on the discussion of Bangkok interop: control data channel filtering via signal channel,
we've submitted the new draft for an extension to the DOTS signal channel to control the filtering rules during attack mitigation.

thanks,
Kaname Nishizuka



-------- Forwarded Message --------
Subject: 	I-D Action: draft-nishizuka-dots-signal-control-filtering-00.txt
Date: 	Tue, 20 Nov 2018 17:42:13 -0800
From: 	internet-drafts@ietf.org
Reply-To: 	internet-drafts@ietf.org
To: 	i-d-announce@ietf.org



A New Internet-Draft is available from the on-line Internet-Drafts directories.


         Title           : Controlling Filtering Rules Using DOTS Signal Channel
         Authors         : Kaname Nishizuka
                           Takahiko Nagata
                           Tirumaleswar Reddy
                           Mohamed Boucadair
	Filename        : draft-nishizuka-dots-signal-control-filtering-00.txt
	Pages           : 11
	Date            : 2018-11-20

Abstract:
    This document specifies an extension to the DOTS signal channel to
    control the filtering rules during attack mitigation.

    This extension allows a DOTS client to activate or de-activate
    filtering rules during a DDoS attack.  The characterization of these
    filters is supposed to be conveyed by a DOTS client during peace time
    by means of DOTS data channel.

Editorial Note (To be removed by RFC Editor)

    Please update these statements within the document with the RFC
    number to be assigned to this document:

    o  "This version of this YANG module is part of RFC XXXX;"

    o  "RFC XXXX: Controlling Filtering Rules Using DOTS Signal Channel";

    o  reference: RFC XXXX

    o  [RFCXXXX]

    Please update these statements with the RFC number to be assigned to
    the following documents:

    o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
       (DOTS) Signal Channel Specification" (used to be
       [I-D.ietf-dots-signal-channel])

    o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
       (DOTS) Data Channel Specification" (used to be
       [I-D.ietf-dots-data-channel])

    Please update the "revision" date of the YANG module.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-filtering/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filtering-00
https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-control-filtering-00


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
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I-D-Announce@ietf.org
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--------------6D9FC798474E8126E5B3B6C8
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<html>
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    <meta http-equiv="content-type" content="text/html; charset=windows-1252">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <div class="moz-forward-container">Hi,<br>
      <br>
      Base on the discussion of Bangkok interop: control data channel
      filtering via signal channel,<br>
      we've submitted the new draft for an extension to the DOTS signal
      channel to control the filtering rules during attack mitigation.<br>
      <br>
      thanks,<br>
      Kaname Nishizuka<br>
      <br>
      <br>
      <br>
      -------- Forwarded Message --------
      <table class="moz-email-headers-table" cellspacing="0"
        cellpadding="0" border="0">
        <tbody>
          <tr>
            <th valign="BASELINE" align="RIGHT" nowrap="nowrap">Subject:
            </th>
            <td>I-D Action:
              draft-nishizuka-dots-signal-control-filtering-00.txt</td>
          </tr>
          <tr>
            <th valign="BASELINE" align="RIGHT" nowrap="nowrap">Date: </th>
            <td>Tue, 20 Nov 2018 17:42:13 -0800</td>
          </tr>
          <tr>
            <th valign="BASELINE" align="RIGHT" nowrap="nowrap">From: </th>
            <td><a class="moz-txt-link-abbreviated" href="mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a></td>
          </tr>
          <tr>
            <th valign="BASELINE" align="RIGHT" nowrap="nowrap">Reply-To:
            </th>
            <td><a class="moz-txt-link-abbreviated" href="mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a></td>
          </tr>
          <tr>
            <th valign="BASELINE" align="RIGHT" nowrap="nowrap">To: </th>
            <td><a class="moz-txt-link-abbreviated" href="mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a></td>
          </tr>
        </tbody>
      </table>
      <br>
      <br>
      <pre>A New Internet-Draft is available from the on-line Internet-Drafts directories.


        Title           : Controlling Filtering Rules Using DOTS Signal Channel
        Authors         : Kaname Nishizuka
                          Takahiko Nagata
                          Tirumaleswar Reddy
                          Mohamed Boucadair
	Filename        : draft-nishizuka-dots-signal-control-filtering-00.txt
	Pages           : 11
	Date            : 2018-11-20

Abstract:
   This document specifies an extension to the DOTS signal channel to
   control the filtering rules during attack mitigation.

   This extension allows a DOTS client to activate or de-activate
   filtering rules during a DDoS attack.  The characterization of these
   filters is supposed to be conveyed by a DOTS client during peace time
   by means of DOTS data channel.

Editorial Note (To be removed by RFC Editor)

   Please update these statements within the document with the RFC
   number to be assigned to this document:

   o  "This version of this YANG module is part of RFC XXXX;"

   o  "RFC XXXX: Controlling Filtering Rules Using DOTS Signal Channel";

   o  reference: RFC XXXX

   o  [RFCXXXX]

   Please update these statements with the RFC number to be assigned to
   the following documents:

   o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Signal Channel Specification" (used to be
      [I-D.ietf-dots-signal-channel])

   o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Data Channel Specification" (used to be
      [I-D.ietf-dots-data-channel])

   Please update the "revision" date of the YANG module.


The IETF datatracker status page for this draft is:
<a class="moz-txt-link-freetext" href="https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-filtering/">https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-filtering/</a>

There are also htmlized versions available at:
<a class="moz-txt-link-freetext" href="https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filtering-00">https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filtering-00</a>
<a class="moz-txt-link-freetext" href="https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-control-filtering-00">https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-control-filtering-00</a>


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
<a class="moz-txt-link-freetext" href="ftp://ftp.ietf.org/internet-drafts/">ftp://ftp.ietf.org/internet-drafts/</a>

_______________________________________________
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<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/i-d-announce">https://www.ietf.org/mailman/listinfo/i-d-announce</a>
Internet-Draft directories: <a class="moz-txt-link-freetext" href="http://www.ietf.org/shadow.html">http://www.ietf.org/shadow.html</a>
or <a class="moz-txt-link-freetext" href="ftp://ftp.ietf.org/ietf/1shadow-sites.txt">ftp://ftp.ietf.org/ietf/1shadow-sites.txt</a>
</pre>
    </div>
  </body>
</html>

--------------6D9FC798474E8126E5B3B6C8--


From nobody Tue Nov 20 22:34:53 2018
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Subject: [Dots] I-D Action: draft-ietf-dots-data-channel-23.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

        Title           : Distributed Denial-of-Service Open Threat Signaling (DOTS) Data Channel Specification
        Authors         : Mohamed Boucadair
                          Tirumaleswar Reddy
                          Kaname Nishizuka
                          Liang Xia
                          Prashanth Patil
                          Andrew Mortensen
                          Nik Teague
	Filename        : draft-ietf-dots-data-channel-23.txt
	Pages           : 69
	Date            : 2018-11-20

Abstract:
   The document specifies a Distributed Denial-of-Service Open Threat
   Signaling (DOTS) data channel used for bulk exchange of data that
   cannot easily or appropriately communicated through the DOTS signal
   channel under attack conditions.

   This is a companion document to the DOTS signal channel
   specification.

Editorial Note (To be removed by RFC Editor)

   Please update these statements within the document with the RFC
   number to be assigned to this document:

   o  "This version of this YANG module is part of RFC XXXX;"

   o  "RFC XXXX: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Data Channel Specification";

   o  reference: RFC XXXX

   Please update these statements with the RFC number to be assigned to
   the following documents:

   o  "RFC YYYY: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Signal Channel Specification" (used to be
      [I-D.ietf-dots-signal-channel])

   o  "RFC ZZZZ: Network Access Control List (ACL) YANG Data Model"
      (used to be [I-D.ietf-netmod-acl-model])

   Please update the "revision" date of the YANG module.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-data-channel/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-data-channel-23
https://datatracker.ietf.org/doc/html/draft-ietf-dots-data-channel-23

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dots-data-channel-23


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Tue Nov 20 22:41:31 2018
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From: <mohamed.boucadair@orange.com>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: I-D Action: draft-ietf-dots-data-channel-23.txt
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Subject: Re: [Dots] I-D Action: draft-ietf-dots-data-channel-23.txt
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Hi all,=20

This version implements minor modifications mainly to allow for the deactiv=
ating a filter. The aim is to easily plug the filter control feature using =
signal channel.=20

The change is as follows:=20

OLD:

   activation-type:  Indicates whether an ACL has to be installed
      immediately or during mitigation time.

NEW:

   activation-type:  Indicates whether an ACL has to be activated
      (immediately or during mitigation time) or instantiated without
      being activated (deactivated).  Deactivated ACLs can be activated
      using a variety of means such as manual configuration on a DOTS
      server or using the DOTS data channel.

I prefer to release this version so that Ben can review that part too. =20

Cheers,
Med

> -----Message d'origine-----
> De=A0: I-D-Announce [mailto:i-d-announce-bounces@ietf.org] De la part de
> internet-drafts@ietf.org
> Envoy=E9=A0: mercredi 21 novembre 2018 07:35
> =C0=A0: i-d-announce@ietf.org
> Cc=A0: dots@ietf.org
> Objet=A0: I-D Action: draft-ietf-dots-data-channel-23.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the DDoS Open Threat Signaling WG of the IET=
F.
>=20
>         Title           : Distributed Denial-of-Service Open Threat Signa=
ling
> (DOTS) Data Channel Specification
>         Authors         : Mohamed Boucadair
>                           Tirumaleswar Reddy
>                           Kaname Nishizuka
>                           Liang Xia
>                           Prashanth Patil
>                           Andrew Mortensen
>                           Nik Teague
> 	Filename        : draft-ietf-dots-data-channel-23.txt
> 	Pages           : 69
> 	Date            : 2018-11-20
>=20
> Abstract:
>    The document specifies a Distributed Denial-of-Service Open Threat
>    Signaling (DOTS) data channel used for bulk exchange of data that
>    cannot easily or appropriately communicated through the DOTS signal
>    channel under attack conditions.
>=20
>    This is a companion document to the DOTS signal channel
>    specification.
>=20
> Editorial Note (To be removed by RFC Editor)
>=20
>    Please update these statements within the document with the RFC
>    number to be assigned to this document:
>=20
>    o  "This version of this YANG module is part of RFC XXXX;"
>=20
>    o  "RFC XXXX: Distributed Denial-of-Service Open Threat Signaling
>       (DOTS) Data Channel Specification";
>=20
>    o  reference: RFC XXXX
>=20
>    Please update these statements with the RFC number to be assigned to
>    the following documents:
>=20
>    o  "RFC YYYY: Distributed Denial-of-Service Open Threat Signaling
>       (DOTS) Signal Channel Specification" (used to be
>       [I-D.ietf-dots-signal-channel])
>=20
>    o  "RFC ZZZZ: Network Access Control List (ACL) YANG Data Model"
>       (used to be [I-D.ietf-netmod-acl-model])
>=20
>    Please update the "revision" date of the YANG module.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-dots-data-channel/
>=20
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-dots-data-channel-23
> https://datatracker.ietf.org/doc/html/draft-ietf-dots-data-channel-23
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-dots-data-channel-23
>=20
>=20
> Please note that it may take a couple of minutes from the time of submiss=
ion
> until the htmlized version and diff are available at tools.ietf.org.
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt


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Date: Thu, 22 Nov 2018 08:20:04 +0100
Cc: Roman Danyliw <rdd@cert.org>, "Xialiang (Frank, Network Integration Technology Research Dept)" <frank.xialiang@huawei.com>,  "Panwei (William) (william.panwei@huawei.com)" <william.panwei@huawei.com>, "dots@ietf.org" <dots@ietf.org>
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To: mohamed.boucadair@orange.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/WWYTHct5wdFr4QiUygNA5f4xmzI>
Subject: Re: [Dots] TR: New Version Notification for draft-reddy-dots-home-network-02.txt
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Currently I am in Morocco. Still useful to review next week?


-d

> On Nov 13, 2018, at 3:37 PM, <mohamed.boucadair@orange.com> <mohamed.bouca=
dair@orange.com> wrote:
>=20
> Hi Roman, Franck, Wei,=20
>=20
> FYI, we released an updated version of the draft which integrates the comm=
ents you raised. The main changes are as follows:=20
>=20
> * Add a new privacy considerations section as suggested by Roman.
> * Add a discussion on issues/fixes when an address sharing function is pre=
sent between the DOTS client and server (Wei)
> * Add some text to clarify that the DOTS server on the CPE is simple compa=
red to the one on the provider side. Only a single DOTS session will be main=
tained (Franck).
> * Further highlight that the solution is suitable for blocking attacks nea=
r the sources (I failed to get the name of the gentleman who raised this iss=
ue in the meeting).
> * Add some text to clarify that DOTS servers do not blindly accept request=
s and that the solution does not aim to track or censor users (the comment w=
as made by same gentleman as above). =20
>=20
> Please let us know if the new text addresses your concern.=20
>=20
> As usual, comments, suggestions, and questions are more than welcome.
>=20
> Cheers,
> Med
>=20
>> -----Message d'origine-----
>> De : internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]
>> Envoy=C3=A9 : mardi 13 novembre 2018 15:28
>> =C3=80 : Tirumaleswar Reddy; Joshi Harsha; Jon Shallow; Reddy K; BOUCADAI=
R Mohamed
>> TGI/OLN
>> Objet : New Version Notification for draft-reddy-dots-home-network-02.txt=

>>=20
>>=20
>> A new version of I-D, draft-reddy-dots-home-network-02.txt
>> has been successfully submitted by Mohamed Boucadair and posted to the
>> IETF repository.
>>=20
>> Name:        draft-reddy-dots-home-network
>> Revision:    02
>> Title:        Denial-of-Service Open Threat Signaling (DOTS) Signal
>> Channel Call Home
>> Document date:    2018-11-12
>> Group:        Individual Submission
>> Pages:        17
>> URL:            https://www.ietf.org/internet-drafts/draft-reddy-dots-hom=
e-
>> network-02.txt
>> Status:         https://datatracker.ietf.org/doc/draft-reddy-dots-home-
>> network/
>> Htmlized:       https://tools.ietf.org/html/draft-reddy-dots-home-network=
-02
>> Htmlized:       https://datatracker.ietf.org/doc/html/draft-reddy-dots-ho=
me-
>> network
>> Diff:           https://www.ietf.org/rfcdiff?url2=3Ddraft-reddy-dots-home=
-
>> network-02
>>=20
>> Abstract:
>>   This document presents DOTS signal channel Call Home service, which
>>   enables a DOTS server to initiate a secure connection to a DOTS
>>   client, and to receive the attack traffic information from the DOTS
>>   client.  The DOTS server in turn uses the attack traffic information
>>   to identify the compromised devices launching the outgoing DDOS
>>   attack and takes appropriate mitigation action.
>>=20
>>=20
>>=20
>>=20
>> Please note that it may take a couple of minutes from the time of submiss=
ion
>> until the htmlized version and diff are available at tools.ietf.org.
>>=20
>> The IETF Secretariat
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: <mohamed.boucadair@orange.com>
To: Dan Wing <danwing@gmail.com>
CC: Roman Danyliw <rdd@cert.org>, "Xialiang (Frank, Network Integration Technology Research Dept)" <frank.xialiang@huawei.com>, "Panwei (William) (william.panwei@huawei.com)" <william.panwei@huawei.com>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] TR: New Version Notification for draft-reddy-dots-home-network-02.txt
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From: "Panwei (William)" <william.panwei@huawei.com>
To: kaname nishizuka <kaname@nttv6.jp>
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Thread-Topic: Suggestions about draft-nishizuka-dots-signal-control-filtering
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<div class=3D"WordSection1">
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Hi Kan=
ame,<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p>&=
nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">I have=
 read your draft recently, and I have two suggestions about it.<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">1. I=
=A1=AFd like to suggest using =A1=B0whitelist=A1=B1 or =A1=B0DDoS detection=
 whitelist=A1=B1 instead of =A1=B0accept-list=A1=B1 in the typical case.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:0cm;margin-left:24.0pt;margin-bottom:.0001pt;mso-margin-top-alt:=
0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:0cm;mso-para-margin-le=
ft:2.0gd;mso-para-margin-bottom:.0001pt;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier;color:wi=
ndowtext">A typical case is a DOTS client which configures during peace tim=
e<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:0cm;margin-left:24.0pt;margin-bottom:.0001pt;mso-margin-top-alt:=
0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:0cm;mso-para-margin-le=
ft:2.0gd;mso-para-margin-bottom:.0001pt;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier;color:wi=
ndowtext">filtering rules using data channel to permit traffic from accept-=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:0cm;margin-left:24.0pt;margin-bottom:.0001pt;mso-margin-top-alt:=
0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:0cm;mso-para-margin-le=
ft:2.0gd;mso-para-margin-bottom:.0001pt;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier;color:wi=
ndowtext">listed sources, but during the volumetric DDoS attack the DDoS<o:=
p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:0cm;margin-left:24.0pt;margin-bottom:.0001pt;mso-margin-top-alt:=
0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:0cm;mso-para-margin-le=
ft:2.0gd;mso-para-margin-bottom:.0001pt;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier;color:wi=
ndowtext">mitigator identifies the source addresses/prefixes in the accept-=
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:0cm;margin-left:24.0pt;margin-bottom:.0001pt;mso-margin-top-alt:=
0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:0cm;mso-para-margin-le=
ft:2.0gd;mso-para-margin-bottom:.0001pt;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier;color:wi=
ndowtext">listed filtering rules are attacking the target. For example, an<=
o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:0cm;margin-left:24.0pt;margin-bottom:.0001pt;mso-margin-top-alt:=
0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:0cm;mso-para-margin-le=
ft:2.0gd;mso-para-margin-bottom:.0001pt;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier;color:wi=
ndowtext">attacker can spoof the IP addresses of accept-listed sources to<o=
:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:0cm;margin-left:24.0pt;margin-bottom:.0001pt;mso-margin-top-alt:=
0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:0cm;mso-para-margin-le=
ft:2.0gd;mso-para-margin-bottom:.0001pt;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier;color:wi=
ndowtext">generate attack traffic or the attacker can compromise the accept=
-<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:3.6pt;margin-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-=
right:0cm;mso-para-margin-bottom:3.6pt;mso-para-margin-left:2.0gd">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier;color:wi=
ndowtext">listed sources and program them to launch DDoS attack.</span><spa=
n lang=3D"EN-US" style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:=
windowtext"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">In thi=
s typical case, when you use =A1=B0accept-list=A1=B1, it sounds like that o=
nly the traffic which match the accept-list can reach the target.
 I don=A1=AFt know if you mean so, but if YES, I feel like the extension ma=
y not be essentially needed in such case. Because if a DDoS attack occurs i=
n such situation, the attacker must have been included in the accept-list. =
The DOTS server can get this conclusion
 as the DOTS client can, so the DOTS server can de-activate the accept-list=
 by its own without DOTS client=A1=AFs request of filtering rules.
<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">In my =
opinion, =A1=B0whitelist=A1=B1 or =A1=B0DDoS detection whitelist=A1=B1 is m=
ore suitable than &nbsp;=A1=B0accept-list=A1=B1. Because it indicates that =
the traffic
 which doesn=A1=AFt match the DDoS whitelist can also reach the target, as =
long as it passes the detection. And if a DDoS attack happens, the DOTS ser=
ver can=A1=AFt know if the attacker is in the whitelist. If DOTS client fin=
d that the attacker is included in the DDoS
 whitelist, it must request the DOTS server to de-activate the whitelist.<o=
:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">I=A1=
=AFm not object to your case, I just want to make it clear and no misunders=
tanding.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p>&=
nbsp;</o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">2. I=
=A1=AFd like to suggest adding a guideline or suggestion about using signal=
 channel to control filtering rules.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">The pu=
rpose of using DOTS signal channel to control filtering rules is trying to =
help mitigate the DDoS attack when under attack time.
 This purpose should also be the guideline. <o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Reques=
ts which can help mitigate the attack should be send by the signal channel =
immediately. Requests which can=A1=AFt help mitigate the
 attack should wait for the data channel to be re-established and then be s=
ent by the data channel.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">For ex=
ample, during attack time, de-activating a drop-list (or blacklist) or acti=
vating a accept-list (or whitelist) may usually not
 help mitigate the DDoS attack. So If there is no necessary reason, these t=
wo requests should wait for using the data channel.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p>&=
nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:3.6pt;margin-right:0cm;m=
argin-bottom:3.6pt;margin-left:0cm;mso-margin-top-alt:.3gd;mso-para-margin-=
right:0cm;mso-para-margin-bottom:3.6pt;mso-para-margin-left:0cm;text-align:=
justify;text-justify:inter-ideograph">
<span lang=3D"EN-US" style=3D"font-family:&quot;Calibri&quot;,sans-serif;co=
lor:windowtext">Best Regards<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:3.6pt;margin-right:0cm;m=
argin-bottom:3.6pt;margin-left:0cm;mso-margin-top-alt:.3gd;mso-para-margin-=
right:0cm;mso-para-margin-bottom:3.6pt;mso-para-margin-left:0cm;text-align:=
justify;text-justify:inter-ideograph">
<span lang=3D"EN-US" style=3D"font-family:&quot;Calibri&quot;,sans-serif;co=
lor:windowtext">Wei Pan<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US" s=
tyle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p>&=
nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:3.6pt;margin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-=
right:0cm;mso-para-margin-bottom:3.6pt;mso-para-margin-left:1.75gd">
<b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=
=DA&quot;,sans-serif;color:windowtext">=B7=A2=BC=FE=C8=CB<span lang=3D"EN-U=
S">:</span></span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-f=
amily:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif;color:windowtext"> Do=
ts [mailto:dots-bounces@ietf.org]
</span><b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif;color:windowtext">=B4=FA=B1=ED
</span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quot=
;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif;color:windowtext">kaname nishizu=
ka<br>
</span><b><span style=3D"font-size:11.0pt;font-family:&quot;=CE=A2=C8=ED=D1=
=C5=BA=DA&quot;,sans-serif;color:windowtext">=B7=A2=CB=CD=CA=B1=BC=E4<span =
lang=3D"EN-US">:</span></span></b><span lang=3D"EN-US" style=3D"font-size:1=
1.0pt;font-family:&quot;=CE=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif;color:win=
dowtext"> 2018</span><span style=3D"font-size:11.0pt;font-family:&quot;=CE=
=A2=C8=ED=D1=C5=BA=DA&quot;,sans-serif;color:windowtext">=C4=EA<span lang=
=3D"EN-US">11</span>=D4=C2<span lang=3D"EN-US">21</span>=C8=D5<span lang=3D=
"EN-US">
 9:50<br>
</span><b>=CA=D5=BC=FE=C8=CB<span lang=3D"EN-US">:</span></b><span lang=3D"=
EN-US"> dots@ietf.org<br>
</span><b>=D6=F7=CC=E2<span lang=3D"EN-US">:</span></b><span lang=3D"EN-US"=
> [Dots] Fwd: I-D Action: draft-nishizuka-dots-signal-control-filtering-00.=
txt<o:p></o:p></span></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:3.6pt;margin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-=
right:0cm;mso-para-margin-bottom:3.6pt;mso-para-margin-left:1.75gd">
<span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:3.6pt;margin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-=
right:0cm;mso-para-margin-bottom:3.6pt;mso-para-margin-left:1.75gd">
<span lang=3D"EN-US">Hi,<br>
<br>
Base on the discussion of Bangkok interop: control data channel filtering v=
ia signal channel,<br>
we've submitted the new draft for an extension to the DOTS signal channel t=
o control the filtering rules during attack mitigation.<br>
<br>
thanks,<br>
Kaname Nishizuka<br>
<br>
<br>
<br>
-------- Forwarded Message -------- <o:p></o:p></span></p>
<table class=3D"MsoNormalTable" border=3D"0" cellspacing=3D"0" cellpadding=
=3D"0" style=3D"margin-left:21.0pt">
<tbody>
<tr>
<td nowrap=3D"" valign=3D"top" style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" align=3D"right" style=3D"margin-bottom:3.6pt;text-al=
ign:right"><b><span lang=3D"EN-US">Subject:
<o:p></o:p></span></b></p>
</td>
<td style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US">I=
-D Action: draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p><=
/span></p>
</td>
</tr>
<tr>
<td nowrap=3D"" valign=3D"top" style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" align=3D"right" style=3D"margin-bottom:3.6pt;text-al=
ign:right"><b><span lang=3D"EN-US">Date:
<o:p></o:p></span></b></p>
</td>
<td style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US">T=
ue, 20 Nov 2018 17:42:13 -0800<o:p></o:p></span></p>
</td>
</tr>
<tr>
<td nowrap=3D"" valign=3D"top" style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" align=3D"right" style=3D"margin-bottom:3.6pt;text-al=
ign:right"><b><span lang=3D"EN-US">From:
<o:p></o:p></span></b></p>
</td>
<td style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US"><=
a href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></span></p>
</td>
</tr>
<tr>
<td nowrap=3D"" valign=3D"top" style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" align=3D"right" style=3D"margin-bottom:3.6pt;text-al=
ign:right"><b><span lang=3D"EN-US">Reply-To:
<o:p></o:p></span></b></p>
</td>
<td style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US"><=
a href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></span></p>
</td>
</tr>
<tr>
<td nowrap=3D"" valign=3D"top" style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" align=3D"right" style=3D"margin-bottom:3.6pt;text-al=
ign:right"><b><span lang=3D"EN-US">To:
<o:p></o:p></span></b></p>
</td>
<td style=3D"padding:0cm 0cm 0cm 0cm">
<p class=3D"MsoNormal" style=3D"margin-bottom:3.6pt"><span lang=3D"EN-US"><=
a href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a><o:p></o:p=
></span></p>
</td>
</tr>
</tbody>
</table>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:0cm;margin-right:0cm;mar=
gin-bottom:3.6pt;margin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-=
right:0cm;mso-para-margin-bottom:3.6pt;mso-para-margin-left:1.75gd">
<span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">A Ne=
w Internet-Draft is available from the on-line Internet-Drafts directories.=
<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Title&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : Controlling Filtering Rules Using DOTS Sign=
al Channel<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Authors&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp; : Kaname Nishizuka<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tak=
ahiko Nagata<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tir=
umaleswar Reddy<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Moh=
amed Boucadair<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp; Filename&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : draft-n=
ishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp; Pages&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp; : 11<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp; Date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp; : 2018-11-20<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">Abst=
ract:<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; This document specifies an extension to the DOTS signal channel to=
<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; control the filtering rules during attack mitigation.<o:p></o:p></=
span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; This extension allows a DOTS client to activate or de-activate<o:p=
></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; filtering rules during a DDoS attack.&nbsp; The characterization o=
f these<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; filters is supposed to be conveyed by a DOTS client during peace t=
ime<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; by means of DOTS data channel.<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">Edit=
orial Note (To be removed by RFC Editor)<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; Please update these statements within the document with the RFC<o:=
p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; number to be assigned to this document:<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; o&nbsp; &quot;This version of this YANG module is part of RFC XXXX=
;&quot;<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; o&nbsp; &quot;RFC XXXX: Controlling Filtering Rules Using DOTS Sig=
nal Channel&quot;;<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; o&nbsp; reference: RFC XXXX<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; o&nbsp; [RFCXXXX]<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; Please update these statements with the RFC number to be assigned =
to<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; the following documents:<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; o&nbsp; &quot;RFC SSSS: Distributed Denial-of-Service Open Threat =
Signaling<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) Signal Channel Specification&quot; (used =
to be<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp; [I-D.ietf-dots-signal-channel])<o:p></o:p></span=
></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; o&nbsp; &quot;RFC DDDD: Distributed Denial-of-Service Open Threat =
Signaling<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) Data Channel Specification&quot; (used to=
 be<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp; [I-D.ietf-dots-data-channel])<o:p></o:p></span><=
/pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">&nbs=
p;&nbsp; Please update the &quot;revision&quot; date of the YANG module.<o:=
p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">The =
IETF datatracker status page for this draft is:<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><a h=
ref=3D"https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control=
-filtering/">https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-c=
ontrol-filtering/</a><o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">Ther=
e are also htmlized versions available at:<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><a h=
ref=3D"https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filt=
ering-00">https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-f=
iltering-00</a><o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><a h=
ref=3D"https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-co=
ntrol-filtering-00">https://datatracker.ietf.org/doc/html/draft-nishizuka-d=
ots-signal-control-filtering-00</a><o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">Plea=
se note that it may take a couple of minutes from the time of submission<o:=
p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">unti=
l the htmlized version and diff are available at tools.ietf.org.<o:p></o:p>=
</span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">Inte=
rnet-Drafts are also available by anonymous FTP at:<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><a h=
ref=3D"ftp://ftp.ietf.org/internet-drafts/">ftp://ftp.ietf.org/internet-dra=
fts/</a><o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><o:p=
>&nbsp;</o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">____=
___________________________________________<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">I-D-=
Announce mailing list<o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><a h=
ref=3D"mailto:I-D-Announce@ietf.org">I-D-Announce@ietf.org</a><o:p></o:p></=
span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US"><a h=
ref=3D"https://www.ietf.org/mailman/listinfo/i-d-announce">https://www.ietf=
.org/mailman/listinfo/i-d-announce</a><o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">Inte=
rnet-Draft directories: <a href=3D"http://www.ietf.org/shadow.html">http://=
www.ietf.org/shadow.html</a><o:p></o:p></span></pre>
<pre style=3D"mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;m=
argin-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para=
-margin-bottom:3.6pt;mso-para-margin-left:1.75gd"><span lang=3D"EN-US">or <=
a href=3D"ftp://ftp.ietf.org/ietf/1shadow-sites.txt">ftp://ftp.ietf.org/iet=
f/1shadow-sites.txt</a><o:p></o:p></span></pre>
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From: <mohamed.boucadair@orange.com>
To: "Panwei (William)" <william.panwei@huawei.com>, kaname nishizuka <kaname@nttv6.jp>
CC: "dots@ietf.org" <dots@ietf.org>
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From: "Panwei (William)" <william.panwei@huawei.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>
CC: "dots@ietf.org" <dots@ietf.org>, kaname nishizuka <kaname@nttv6.jp>
Thread-Topic: Suggestions about draft-nishizuka-dots-signal-control-filtering
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Date: Fri, 23 Nov 2018 08:24:46 +0000
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: "'Panwei \(William\)'" <william.panwei@huawei.com>, <dots@ietf.org>, <mohamed.boucadair@orange.com>, "'Konda, Tirumaleswar Reddy'" <TirumaleswarReddy_Konda@mcafee.com>, "'kaname nishizuka'" <kaname@nttv6.jp>
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Hi There,

=20

This thread has flagged up to me that we are trying to represent a =
tri-state of actions (=E2=80=9Calways-drop=E2=80=9D, =
=E2=80=9Calways-let-through=E2=80=9D and =
=E2=80=9Clet-through-if-after-being-mitigated-it-is-allowed=E2=80=9D) =
with a duo-state of =E2=80=9Caccept-list=E2=80=9D and =
=E2=80=9Cdrop-list=E2=80=9D in the (Data Channel) ACLs.

=20

The traditional ACL is a set of match criteria and then an appropriate =
action if matched. =20

[As a separate note, picked up later, it has always been unclear in my =
mind over many years as to what happens if a packet does not trigger a =
match in any of the ACLs (falls off the end of the list).  What happens =
is usually defined by documentation of what actually happens in the =
underlying logic.  The Data Channel currently states =E2=80=9CIf there =
is no match, then there is no action to be taken against the =
packet.=E2=80=9D.]

The Data Channel only defines the DOTS forwarding actions as =
=E2=80=98accept=E2=80=99 or =E2=80=98drop=E2=80=99 with the addition of =
=E2=80=98rate-limit=E2=80=99 if =E2=80=98accept=E2=80=99 is defined.

It does state that, as an example, =E2=80=9CAccept-list management, =
which enables a DOTS client to inform a DOTS server about sources from =
which traffic should always be accepted=E2=80=9D which implies that =
=E2=80=98accept=E2=80=99 is the same as what we knew as white-list.  =
However, =E2=80=98accept=E2=80=99 means just that =E2=80=93 it is =
accepted at this point in the process.  Yes, it is effectively defined =
as a white list in the requirements document, but even though those =
working with the DOTS documents can get confused as they also are =
thinking about mitigate or mitigation [Is it accepted for mitigation, or =
is it unconditionally accepted?].

=20

We need the DOTS server to clearly understand the tri-state, and  cause =
(how is out of scope) traffic to be always accepted, always dropped or =
be analysed to see if it needs to be mitigated.

=20

In terms of moving forward, we could (in Data Channel) have an =
additional =E2=80=98leaf mitigate=E2=80=99 in =E2=80=98container =
actions=E2=80=99 which is only available when =E2=80=98accept=E2=80=99.  =
If true, traffic is passed to a mitigator (how out of scope), if false =
traffic is always passed through. (=E2=80=98leaf rate-limit=E2=80=99 is =
a special case of mitigation I guess.)

Alternatively, we could have actions of =E2=80=98accept=E2=80=99, =
=E2=80=98drop=E2=80=99 or =E2=80=98mitigate=E2=80=99.  =
=E2=80=98accept=E2=80=99 would then have the traditional meaning of pass =
=E2=80=93 effectively a white-list as previously intended, and =
=E2=80=98mitigate=E2=80=99 much clearer to the reader as to the intent.  =
Then we just need a definition for =E2=80=9CMitigate-List:=E2=80=9D.  I =
think =E2=80=98rate-limit=E2=80=99 would then have to only be associated =
with =E2=80=98mitigate=E2=80=99, not =E2=80=98accept=E2=80=99 as =
=E2=80=98accept=E2=80=99 is whitelist(no expected additional action).

=20

Using =E2=80=98accept=E2=80=99, =E2=80=98drop=E2=80=99 or =
=E2=80=98mitigate=E2=80=99 (or =E2=80=98accept + mitigate=E2=80=99, =
=E2=80=98accept + no-mitigate=E2=80=99 or =E2=80=98drop=E2=80=99 if =
going with the additional leaf suggestion) makes it much easier to =
directly instantiate these actions in the DOTS server environment.

=20

That then just leaves the question of what happens if there are no ACL =
matches (there could be no ACLs defined).  Do we go for an implied last =
ACL of all other traffic is to be mitigated if mitigating (Signal =
channel request), or do we take =E2=80=98no action=E2=80=99 as defined =
in the Data Channel?

=20

Regards

=20

Jon

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of Panwei (William)
Sent: 23 November 2018 08:25
To: Konda, Tirumaleswar Reddy; mohamed.boucadair@orange.com
Cc: dots@ietf.org; kaname nishizuka
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Tiru, Med,

=20

Thank you for explaining and reminding me. I just remembered that this =
terminology has already been described in the requirement draft.

Accept-list: A list of filters indicating sources from which traffic

should always be allowed, regardless of contradictory data gleaned

in a detected attack.

=20

Best Regards

Wei Pan

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: Konda, Tirumaleswar Reddy =
[mailto:TirumaleswarReddy_Konda@McAfee.com]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2018=E5=B9=B411=E6=9C=8823=E6=97=A5 16:07
=E6=94=B6=E4=BB=B6=E4=BA=BA: mohamed.boucadair@orange.com; Panwei =
(William) <william.panwei@huawei.com>; kaname nishizuka =
<kaname@nttv6.jp>
=E6=8A=84=E9=80=81: dots@ietf.org
=E4=B8=BB=E9=A2=98: RE: Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

If accept-listed sources are attacking the target, the DOTS server =
cannot turn-off the accept-list filtering rules without the consent from =
the DOTS client. DOTS server can inform the DOTS client of the conflict =
and/or the DOTS client with DDoS detection capability can identify the =
attack, and using the signal channel de-activate the accept-list =
filtering rules.

=20

=E2=80=9Caccept-list=E2=80=9D does not mean only the traffic matching =
the accept-list will be allowed to reach the target.=20

=20

Cheers,

-Tiru

=20

From: Dots <dots-bounces@ietf.org> On Behalf Of =
mohamed.boucadair@orange.com
Sent: Friday, November 23, 2018 12:04 PM
To: Panwei (William) <william.panwei@huawei.com>; kaname nishizuka =
<kaname@nttv6.jp>
Cc: dots@ietf.org
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20


CAUTION: External email. Do not click links or open attachments unless =
you recognize the sender and know the content is safe.

  _____ =20

Hi Wei,=20

=20

Please see inline.

=20

Cheers,

Med

=20

De : Dots [mailto:dots-bounces@ietf.org] De la part de Panwei (William)
Envoy=C3=A9 : vendredi 23 novembre 2018 04:09
=C3=80 : kaname nishizuka
Cc : dots@ietf.org
Objet : [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Kaname,

=20

I have read your draft recently, and I have two suggestions about it.

1.      I=E2=80=99d like to suggest using =E2=80=9Cwhitelist=E2=80=9D or =
=E2=80=9CDDoS detection whitelist=E2=80=9D instead of =
=E2=80=9Caccept-list=E2=80=9D in the typical case.

=20

[Med] accept-list means white-list. accept-list is already used in DOTS =
requirements and data channel. The signal channel will make use of that =
term too. FWIW, that change is made because of what was reported by =
hrpc.=20

=20

A typical case is a DOTS client which configures during peace time

filtering rules using data channel to permit traffic from accept-

listed sources, but during the volumetric DDoS attack the DDoS

mitigator identifies the source addresses/prefixes in the accept-

listed filtering rules are attacking the target. For example, an

attacker can spoof the IP addresses of accept-listed sources to

generate attack traffic or the attacker can compromise the accept-

listed sources and program them to launch DDoS attack.

In this typical case, when you use =E2=80=9Caccept-list=E2=80=9D, it =
sounds like that only the traffic which match the accept-list can reach =
the target. I don=E2=80=99t know if you mean so, but if YES, I feel like =
the extension may not be essentially needed in such case. Because if a =
DDoS attack occurs in such situation, the attacker must have been =
included in the accept-list. The DOTS server can get this conclusion as =
the DOTS client can, so the DOTS server can de-activate the accept-list =
by its own without DOTS client=E2=80=99s request of filtering rules.=20

In my opinion, =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS detection =
whitelist=E2=80=9D is more suitable than  =E2=80=9Caccept-list=E2=80=9D. =
Because it indicates that the traffic which doesn=E2=80=99t match the =
DDoS whitelist can also reach the target, as long as it passes the =
detection. And if a DDoS attack happens, the DOTS server can=E2=80=99t =
know if the attacker is in the whitelist. If DOTS client find that the =
attacker is included in the DDoS whitelist, it must request the DOTS =
server to de-activate the whitelist.

=20

I=E2=80=99m not object to your case, I just want to make it clear and no =
misunderstanding.

=20

2. I=E2=80=99d like to suggest adding a guideline or suggestion about =
using signal channel to control filtering rules.

The purpose of using DOTS signal channel to control filtering rules is =
trying to help mitigate the DDoS attack when under attack time. This =
purpose should also be the guideline.=20

Requests which can help mitigate the attack should be send by the signal =
channel immediately. Requests which can=E2=80=99t help mitigate the =
attack should wait for the data channel to be re-established and then be =
sent by the data channel.

For example, during attack time, de-activating a drop-list (or =
blacklist) or activating a accept-list (or whitelist) may usually not =
help mitigate the DDoS attack. So If there is no necessary reason, these =
two requests should wait for using the data channel.

=20

[Med] Agree. We do have the following in -01:

=20

   A DOTS client relies on the information received from the DOTS server

   and/or local information to the DOTS client domain to trigger a

   filter control request.  Obviously, only filters that are pertinent

   for an ongoing mitigation should be controlled by a DOTS client using

   the DOTS signal channel.

=20

And

=20

   The DOTS client can also decide to send a PUT request to deactivate

   the "an-accept-list" ACL, if suspect traffic is received from an

   accept-listed source (2001:db8:1234::/48).  The structure of that PUT

   is the same as the one shown in Figure 4.

=20

=20

Best Regards

Wei Pan

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: Dots [mailto:dots-bounces@ietf.org] =
=E4=BB=A3=E8=A1=A8 kaname nishizuka
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2018=E5=B9=B411=E6=9C=8821=E6=97=A5 9:50
=E6=94=B6=E4=BB=B6=E4=BA=BA: dots@ietf.org
=E4=B8=BB=E9=A2=98: [Dots] Fwd: I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt

=20

Hi,

Base on the discussion of Bangkok interop: control data channel =
filtering via signal channel,
we've submitted the new draft for an extension to the DOTS signal =
channel to control the filtering rules during attack mitigation.

thanks,
Kaname Nishizuka



-------- Forwarded Message --------=20


Subject:=20

I-D Action: draft-nishizuka-dots-signal-control-filtering-00.txt


Date:=20

Tue, 20 Nov 2018 17:42:13 -0800


From:=20

internet-drafts@ietf.org


Reply-To:=20

internet-drafts@ietf.org


To:=20

i-d-announce@ietf.org

=20

A New Internet-Draft is available from the on-line Internet-Drafts =
directories.
=20
=20
        Title           : Controlling Filtering Rules Using DOTS Signal =
Channel
        Authors         : Kaname Nishizuka
                          Takahiko Nagata
                          Tirumaleswar Reddy
                          Mohamed Boucadair
    Filename        : =
draft-nishizuka-dots-signal-control-filtering-00.txt
    Pages           : 11
    Date            : 2018-11-20
=20
Abstract:
   This document specifies an extension to the DOTS signal channel to
   control the filtering rules during attack mitigation.
=20
   This extension allows a DOTS client to activate or de-activate
   filtering rules during a DDoS attack.  The characterization of these
   filters is supposed to be conveyed by a DOTS client during peace time
   by means of DOTS data channel.
=20
Editorial Note (To be removed by RFC Editor)
=20
   Please update these statements within the document with the RFC
   number to be assigned to this document:
=20
   o  "This version of this YANG module is part of RFC XXXX;"
=20
   o  "RFC XXXX: Controlling Filtering Rules Using DOTS Signal Channel";
=20
   o  reference: RFC XXXX
=20
   o  [RFCXXXX]
=20
   Please update these statements with the RFC number to be assigned to
   the following documents:
=20
   o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Signal Channel Specification" (used to be
      [I-D.ietf-dots-signal-channel])
=20
   o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Data Channel Specification" (used to be
      [I-D.ietf-dots-data-channel])
=20
   Please update the "revision" date of the YANG module.
=20
=20
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-filt=
ering/
=20
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filtering=
-00
https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-control=
-filtering-00
=20
=20
Please note that it may take a couple of minutes from the time of =
submission
until the htmlized version and diff are available at tools.ietf.org.
=20
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
=20
_______________________________________________
I-D-Announce mailing list
I-D-Announce@ietf.org
https://www.ietf..org/mailman/listinfo/i-d-announce =
<https://www.ietf.org/mailman/listinfo/i-d-announce>=20
Internet-Draft directories: http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

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lang=3DEN-GB link=3Dblue vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi There,<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>This thread has flagged up to me that we are trying to represent a =
tri-state of actions (=E2=80=9Calways-drop=E2=80=9D, =
=E2=80=9Calways-let-through=E2=80=9D and =
=E2=80=9Clet-through-if-after-being-mitigated-it-is-allowed=E2=80=9D) =
with a duo-state of =E2=80=9Caccept-list=E2=80=9D and =
=E2=80=9Cdrop-list=E2=80=9D in the (Data Channel) =
ACLs.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The traditional ACL is a set of match criteria and then an =
appropriate action if matched.=C2=A0 <o:p></o:p></span></p><p =
class=3DMsoNormal style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>[As a separate note, picked up later, it has always been unclear in =
my mind over many years as to what happens if a packet does not trigger =
a match in any of the ACLs (falls off the end of the list). =C2=A0What =
happens is usually defined by documentation of what actually happens in =
the underlying logic.=C2=A0 The Data Channel currently states =
=E2=80=9CIf there is <b>no match</b>, then there is <b>no action</b> to =
be taken against the packet.=E2=80=9D.]<o:p></o:p></span></p><p =
class=3DMsoNormal style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The Data Channel only defines the DOTS forwarding actions as =
=E2=80=98accept=E2=80=99 or =E2=80=98drop=E2=80=99 with the addition of =
=E2=80=98rate-limit=E2=80=99 if =E2=80=98accept=E2=80=99 is =
defined.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>It does state that, as an example, =E2=80=9CAccept-list management, =
which enables a DOTS client to inform a DOTS server about sources from =
which traffic should always be accepted=E2=80=9D which implies that =
=E2=80=98accept=E2=80=99 is the same as what we knew as =
white-list.=C2=A0 However, =E2=80=98accept=E2=80=99 means just that =
=E2=80=93 it is accepted at this point in the process.=C2=A0 Yes, it is =
effectively defined as a white list in the requirements document, but =
even though those working with the DOTS documents can get confused as =
they also are thinking about mitigate or mitigation [Is it accepted for =
mitigation, or is it unconditionally accepted?].<o:p></o:p></span></p><p =
class=3DMsoNormal style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>We need the DOTS server to clearly understand the tri-state, and =
=C2=A0cause (how is out of scope) traffic to be always accepted, always =
dropped or be analysed to see if it needs to be =
mitigated.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>In terms of moving forward, we could (in Data Channel) have an =
additional =E2=80=98leaf mitigate=E2=80=99 in =E2=80=98container =
actions=E2=80=99 which is only available when =
=E2=80=98accept=E2=80=99.=C2=A0 If true, traffic is passed to a =
mitigator (how out of scope), if false traffic is always passed through. =
(=E2=80=98leaf rate-limit=E2=80=99 is a special case of mitigation I =
guess.)<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Alternatively, we could have actions of =E2=80=98accept=E2=80=99, =
=E2=80=98drop=E2=80=99 or =E2=80=98mitigate=E2=80=99.=C2=A0 =
=E2=80=98accept=E2=80=99 would then have the traditional meaning of pass =
=E2=80=93 effectively a white-list as previously intended, and =
=E2=80=98mitigate=E2=80=99 much clearer to the reader as to the =
intent.=C2=A0 Then we just need a definition for =
=E2=80=9CMitigate-List:=E2=80=9D.=C2=A0 I think =
=E2=80=98rate-limit=E2=80=99 would then have to only be associated with =
=E2=80=98mitigate=E2=80=99, not =E2=80=98accept=E2=80=99 as =
=E2=80=98accept=E2=80=99 is whitelist(no expected additional =
action).<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Using =E2=80=98accept=E2=80=99, =E2=80=98drop=E2=80=99 or =
=E2=80=98mitigate=E2=80=99 (or =E2=80=98accept + mitigate=E2=80=99, =
=E2=80=98accept + no-mitigate=E2=80=99 or =E2=80=98drop=E2=80=99 if =
going with the additional leaf suggestion) makes it much easier to =
directly instantiate these actions in the DOTS server =
environment.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>That then just leaves the question of what happens if there are no =
ACL matches (there could be no ACLs defined).=C2=A0 Do we go for an =
implied last ACL of all other traffic is to be mitigated if mitigating =
(Signal channel request), or do we take =E2=80=98no action=E2=80=99 as =
defined in the Data Channel?<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: dots-bounces@ietf.org] <b>On Behalf Of </b>Panwei =
(William)<br><b>Sent:</b> 23 November 2018 08:25<br><b>To:</b> Konda, =
Tirumaleswar Reddy; mohamed.boucadair@orange.com<br><b>Cc:</b> =
dots@ietf.org; kaname nishizuka<br><b>Subject:</b> Re: [Dots] =
Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><o:p>&nbsp;</o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>Hi Tiru, Med,<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>Thank you for explaining and reminding me. I just =
remembered that this terminology has already been described in the =
requirement draft.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd;text-autospace:none'><span=
 lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>Accept-list: A list of filters indicating sources from =
which traffic<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd;text-autospace:none'><span=
 lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>should always be allowed, regardless of contradictory =
data gleaned<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>in a detected attack.</span><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><div><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt;text-align:justify'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>Best Regards<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt;text-align:justify'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>Wei Pan<o:p></o:p></span></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E5=8F=91=
=E4=BB=B6=E4=BA=BA</span></b><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>:</span>=
</b><span lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> Konda, =
Tirumaleswar Reddy [mailto:TirumaleswarReddy_Konda@McAfee.com] =
<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E5=8F=91=
=E9=80=81=E6=97=B6=E9=97=B4</span></b><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>:</span>=
</b><span lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> =
2018</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E5=B9=B4=
</span><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>11</span=
><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E6=9C=88=
</span><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>23</span=
><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E6=97=A5=
</span><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> =
16:07<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E6=94=B6=
=E4=BB=B6=E4=BA=BA</span></b><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>:</span>=
</b><span lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> =
mohamed.boucadair@orange.com; Panwei (William) =
&lt;william.panwei@huawei.com&gt;; kaname nishizuka =
&lt;kaname@nttv6.jp&gt;<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E6=8A=84=
=E9=80=81</span></b><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>:</span>=
</b><span lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> =
dots@ietf.org<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E4=B8=BB=
=E9=A2=98</span></b><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>:</span>=
</b><span lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> RE: =
Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'>If accept-listed sources are attacking =
the target, the DOTS server cannot turn-off the accept-list filtering =
rules without the consent from the DOTS client. DOTS server can inform =
the DOTS client of the conflict and/or the DOTS client with DDoS =
detection capability can identify the attack, and using the signal =
channel de-activate the accept-list filtering =
rules.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'>=E2=80=9Caccept-list=E2=80=9D does not =
mean only the traffic matching the accept-list will be allowed to reach =
the target. <o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'>Cheers,<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'>-Tiru<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'> Dots &lt;<a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>&gt; =
<b>On Behalf Of </b><a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Sent:</b> Friday, November 23, 2018 12:04 PM<br><b>To:</b> =
Panwei (William) &lt;<a =
href=3D"mailto:william.panwei@huawei.com">william.panwei@huawei.com</a>&g=
t;; kaname nishizuka &lt;<a =
href=3D"mailto:kaname@nttv6.jp">kaname@nttv6.jp</a>&gt;<br><b>Cc:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Subject:</b> Re: =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><div><ta=
ble class=3DMsoNormalTable border=3D1 cellspacing=3D3 cellpadding=3D0 =
style=3D'margin-left:21.0pt;background:#F3FF33;border:solid #9B9A87 =
1.5pt'><tr><td style=3D'border:none;padding:.75pt .75pt .75pt =
.75pt'><p><strong><span lang=3DEN-US =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>CAUTION</span></=
strong><span lang=3DEN-US =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>:</span><span =
lang=3DEN-US style=3D'font-family:"Arial","sans-serif";color:black'> =
External email. Do not click links or open attachments unless you =
recognize the sender and know the content is safe.</span><span =
lang=3DEN-US =
style=3D'font-family:"Arial","sans-serif"'><o:p></o:p></span></p></td></t=
r></table><div style=3D'margin-bottom:3.6pt'><div class=3DMsoNormal =
align=3Dcenter =
style=3D'mso-margin-bottom-alt:auto;margin-left:21.0pt;mso-margin-bottom-=
alt:auto;mso-para-margin-left:1.75gd;text-align:center'><span lang=3DFR =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text;mso-fareast-language:ZH-CN'><hr size=3D2 width=3D"100%" =
align=3Dcenter></span></div></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>Hi Wei, <o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>Please see =
inline.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>Cheers,<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>Med<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext;mso-fareast-language:ZH-CN'>De&nbsp;:</span></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext;mso-fareast-language:ZH-CN'> Dots [<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
<b>De la part de</b> Panwei (William)<br><b>Envoy=C3=A9&nbsp;:</b> =
vendredi 23 novembre 2018 04:09<br><b>=C3=80&nbsp;:</b> kaname =
nishizuka<br><b>Cc&nbsp;:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Objet&nbsp;:</b> =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DFR =
style=3D'mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>Hi Kaname,<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>I have read your draft recently, and I have two =
suggestions about it.<o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:93.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:6.25gd;text-indent:-18.0pt'><spa=
n lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>1.</span><span lang=3DEN-US =
style=3D'font-size:7.0pt;color:windowtext;mso-fareast-language:ZH-CN'>&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>I=E2=80=99d like to suggest using =
=E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS detection =
whitelist=E2=80=9D instead of =E2=80=9Caccept-list=E2=80=9D in the =
typical case.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";mso-fareast-language:ZH-CN'><=
o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>[Med] accept-list means white-list. =
accept-list is already used in DOTS requirements and data channel. The =
signal channel will make use of that term too. FWIW, that change is made =
because of what was reported by hrpc. <o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>A typical case is a DOTS client which configures =
during peace time<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>filtering rules using data channel to permit traffic =
from accept-<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>listed sources, but during the volumetric DDoS attack =
the DDoS<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>mitigator identifies the source addresses/prefixes in =
the accept-<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>listed filtering rules are attacking the target. For =
example, an<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>attacker can spoof the IP addresses of accept-listed =
sources to<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>generate attack traffic or the attacker can compromise =
the accept-<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext;mso-fareas=
t-language:ZH-CN'>listed sources and program them to launch DDoS =
attack.</span><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>In this typical case, when you use =
=E2=80=9Caccept-list=E2=80=9D, it sounds like that only the traffic =
which match the accept-list can reach the target. I don=E2=80=99t know =
if you mean so, but if YES, I feel like the extension may not be =
essentially needed in such case. Because if a DDoS attack occurs in such =
situation, the attacker must have been included in the accept-list. The =
DOTS server can get this conclusion as the DOTS client can, so the DOTS =
server can de-activate the accept-list by its own without DOTS =
client=E2=80=99s request of filtering rules. <o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>In my opinion, =E2=80=9Cwhitelist=E2=80=9D or =
=E2=80=9CDDoS detection whitelist=E2=80=9D is more suitable than =
&nbsp;=E2=80=9Caccept-list=E2=80=9D. Because it indicates that the =
traffic which doesn=E2=80=99t match the DDoS whitelist can also reach =
the target, as long as it passes the detection. And if a DDoS attack =
happens, the DOTS server can=E2=80=99t know if the attacker is in the =
whitelist. If DOTS client find that the attacker is included in the DDoS =
whitelist, it must request the DOTS server to de-activate the =
whitelist.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>I=E2=80=99m not object to your case, I just want to make =
it clear and no misunderstanding.<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>2. I=E2=80=99d like to suggest adding a guideline or =
suggestion about using signal channel to control filtering =
rules.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>The purpose of using DOTS signal channel to control =
filtering rules is trying to help mitigate the DDoS attack when under =
attack time. This purpose should also be the guideline. =
<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>Requests which can help mitigate the attack should be =
send by the signal channel immediately. Requests which can=E2=80=99t =
help mitigate the attack should wait for the data channel to be =
re-established and then be sent by the data =
channel.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>For example, during attack time, de-activating a =
drop-list (or blacklist) or activating a accept-list (or whitelist) may =
usually not help mitigate the DDoS attack. So If there is no necessary =
reason, these two requests should wait for using the data =
channel.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>[Med] Agree. We do have the following =
in -01:<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>&nbsp;&nbsp; A DOTS =
client relies on the information received from the DOTS =
server<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>&nbsp;&nbsp; and/or local =
information to the DOTS client domain to trigger =
a<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>&nbsp;&nbsp; filter =
control request.&nbsp; Obviously, only filters that are =
pertinent<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>&nbsp;&nbsp; for an =
ongoing mitigation should be controlled by a DOTS client =
using<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>&nbsp;&nbsp; </span><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>the DOTS signal =
channel.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>And<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>&nbsp;&nbsp; The DOTS =
client can also decide to send a PUT request to =
deactivate<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>&nbsp;&nbsp; the =
&quot;an-accept-list&quot; ACL, if suspect traffic is received from =
an<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>&nbsp;&nbsp; =
accept-listed source (2001:db8:1234::/48).&nbsp; The structure of that =
PUT<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:windowtext;mso-fareast-language:FR'>&nbsp;&nbsp; is the same =
as the one shown in Figure 4.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd;text-align:justify'><span=
 lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>Best Regards<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd;text-align:justify'><span=
 lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'>Wei Pan<o:p></o:p></span></p></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DEN-US =
style=3D'font-family:"Calibri","sans-serif";color:windowtext;mso-fareast-=
language:ZH-CN'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E5=8F=91=
=E4=BB=B6=E4=BA=BA</span></b><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>:</span>=
</b><span lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> Dots =
[<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
</span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E4=BB=A3=
=E8=A1=A8 </span></b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>kaname =
nishizuka<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E5=8F=91=
=E9=80=81=E6=97=B6=E9=97=B4</span></b><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>:</span>=
</b><span lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> =
2018</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E5=B9=B4=
</span><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>11</span=
><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E6=9C=88=
</span><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>21</span=
><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E6=97=A5=
</span><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> =
9:50<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E6=94=B6=
=E4=BB=B6=E4=BA=BA</span></b><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>:</span>=
</b><span lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br></span><b><span =
lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>=E4=B8=BB=
=E9=A2=98</span></b><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'>:</span>=
</b><span lang=3DEN-US style=3D'font-size:11.0pt;font-family:"Microsoft =
YaHei","sans-serif";color:windowtext;mso-fareast-language:ZH-CN'> [Dots] =
Fwd: I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></span></p=
></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'mso-fareast-language:ZH-CN'>Hi,<br><br>Base on the discussion =
of Bangkok interop: control data channel filtering via signal =
channel,<br>we've submitted the new draft for an extension to the DOTS =
signal channel to control the filtering rules during attack =
mitigation.<br><br>thanks,<br>Kaname Nishizuka<br><br><br><br>-------- =
Forwarded Message -------- <o:p></o:p></span></p><table =
class=3DMsoNormalTable border=3D0 cellspacing=3D0 cellpadding=3D0 =
style=3D'margin-left:42.0pt'><tr><td nowrap valign=3Dtop =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'margin-bottom:3.6pt;text-align:right'><b><span =
lang=3DEN-US>Subject: <o:p></o:p></span></b></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span lang=3DEN-US>I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></span></p=
></td></tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm 0cm 0cm =
0cm'><p class=3DMsoNormal align=3Dright =
style=3D'margin-bottom:3.6pt;text-align:right'><b><span =
lang=3DEN-US>Date: <o:p></o:p></span></b></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span lang=3DEN-US>Tue, 20 Nov 2018 =
17:42:13 -0800<o:p></o:p></span></p></td></tr><tr><td nowrap =
valign=3Dtop style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal =
align=3Dright style=3D'margin-bottom:3.6pt;text-align:right'><b><span =
lang=3DEN-US>From: <o:p></o:p></span></b></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span lang=3DEN-US><a =
href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></span></p></td></tr><tr><td nowrap valign=3Dtop =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'margin-bottom:3.6pt;text-align:right'><b><span =
lang=3DEN-US>Reply-To: <o:p></o:p></span></b></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'margin-bottom:3.6pt'><span lang=3DEN-US><a =
href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></span></p></td></tr><tr><td nowrap valign=3Dtop =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'margin-bottom:3.6pt;text-align:right'><b><span lang=3DEN-US>To: =
<o:p></o:p></span></b></p></td><td style=3D'padding:0cm 0cm 0cm 0cm'><p =
class=3DMsoNormal style=3D'margin-bottom:3.6pt'><span lang=3DEN-US><a =
href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a><o:p></o:p=
></span></p></td></tr></table><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></p><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>A New Internet-Draft is available from =
the on-line Internet-Drafts directories.<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; Title&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
Controlling Filtering Rules Using DOTS Signal =
Channel<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p; Authors&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : Kaname =
Nishizuka<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Takahiko =
Nagata<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tirumaleswar =
Reddy<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Mohamed =
Boucadair<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp; =
Filename&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></span></p=
re><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp; =
Pages&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
11<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp; =
Date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
2018-11-20<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>Abstract:<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; This document specifies an =
extension to the DOTS signal channel to<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; control the filtering =
rules during attack mitigation.<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; This extension allows a =
DOTS client to activate or de-activate<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; filtering rules during a =
DDoS attack.&nbsp; The characterization of =
these<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; filters is supposed to be =
conveyed by a DOTS client during peace time<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; by means of DOTS data =
channel.<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>Editorial Note (To be removed by RFC =
Editor)<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; Please update these =
statements within the document with the RFC<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; number to be assigned to =
this document:<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; o&nbsp; &quot;This version =
of this YANG module is part of RFC =
XXXX;&quot;<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; o&nbsp; &quot;RFC XXXX: =
Controlling Filtering Rules Using DOTS Signal =
Channel&quot;;<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; o&nbsp; reference: RFC =
XXXX<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; o&nbsp; =
[RFCXXXX]<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; Please update these =
statements with the RFC number to be assigned =
to<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; the following =
documents:<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; o&nbsp; &quot;RFC SSSS: =
Distributed Denial-of-Service Open Threat =
Signaling<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) =
Signal Channel Specification&quot; (used to =
be<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
[I-D.ietf-dots-signal-channel])<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; o&nbsp; &quot;RFC DDDD: =
Distributed Denial-of-Service Open Threat =
Signaling<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) =
Data Channel Specification&quot; (used to be<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
[I-D.ietf-dots-data-channel])<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>&nbsp;&nbsp; Please update the =
&quot;revision&quot; date of the YANG =
module.<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>The IETF datatracker status page for =
this draft is:<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><a =
href=3D"https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-cont=
rol-filtering/">https://datatracker.ietf.org/doc/draft-nishizuka-dots-sig=
nal-control-filtering/</a><o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>There are also htmlized versions =
available at:<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><a =
href=3D"https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-f=
iltering-00">https://tools.ietf.org/html/draft-nishizuka-dots-signal-cont=
rol-filtering-00</a><o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
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margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><a =
href=3D"https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal=
-control-filtering-00">https://datatracker.ietf.org/doc/html/draft-nishiz=
uka-dots-signal-control-filtering-00</a><o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
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style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>Please note that it may take a couple =
of minutes from the time of submission<o:p></o:p></span></pre><pre =
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style=3D'font-size:10.0pt;font-family:"Courier =
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style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
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margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>Internet-Drafts are also available by =
anonymous FTP at:<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
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style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><o:p>&nbsp;</o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
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_______<o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
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New";mso-fareast-language:ZH-CN'>I-D-Announce mailing =
list<o:p></o:p></span></pre><pre =
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margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
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style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'><a =
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style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>Internet-Draft directories: <a =
href=3D"http://www.ietf.org/shadow.html">http://www.ietf.org/shadow.html<=
/a><o:p></o:p></span></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:ZH-CN'>or <a =
href=3D"ftp://ftp.ietf.org/ietf/1shadow-sites.txt">ftp://ftp.ietf.org/iet=
f/1shadow-sites.txt</a><o:p></o:p></span></pre></div></div></div></div></=
body></html>
------=_NextPart_000_04C5_01D4831D.59D6B300--


From nobody Sat Nov 24 12:33:08 2018
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From: Scott Bradner <sob@sobco.com>
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Subject: [Dots] Opsdir last call review of draft-ietf-dots-requirements-16
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Reviewer: Scott Bradner
Review result: Has Nits

This is an OPS-DIR review of Distributed Denial of Service (DDoS) Open Threat
Signaling Requirements (draft-ietf-dots-requirements)

This document lists requirements for a protocol to used between providers of
DDOS mitigation services and users of such services, as such there can be no
direct operational issues with the document.  I also did not find any indirect
operational issues.

I think the document would benefit from the addition of a section before the
requirements section that specifically describes the setup assumed by the
document. The descriptions before there hint at a presumed setup but a new
section that clearly states the setup would be helpful. (the setup appears to
be one where all network traffic to and from a protected entity flows through a
DDoS mitigation service provider.  The provider includes one or more DOTS
servers.  The protected entity includes one or more DOTS clients that
communicate with the DOTS servers)

Requirement SIG-005 addresses channel redirection – maybe there needs to be a
way that clients can move to a new server on their own if they lose hearbeat
from the server they were using – that might include a way for a server to
provide a list of alternative servers to the clients



From nobody Sun Nov 25 12:33:52 2018
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Date: Sun, 25 Nov 2018 14:33:34 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
To: Scott Bradner <sob@sobco.com>
Cc: ops-dir@ietf.org, draft-ietf-dots-requirements.all@ietf.org, ietf@ietf.org, dots@ietf.org
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Hi Scott,

On Sat, Nov 24, 2018 at 12:32:55PM -0800, Scott Bradner wrote:
> Reviewer: Scott Bradner
> Review result: Has Nits
> 
> This is an OPS-DIR review of Distributed Denial of Service (DDoS) Open Threat
> Signaling Requirements (draft-ietf-dots-requirements)
> 
> This document lists requirements for a protocol to used between providers of
> DDOS mitigation services and users of such services, as such there can be no
> direct operational issues with the document.  I also did not find any indirect
> operational issues.
> 
> I think the document would benefit from the addition of a section before the
> requirements section that specifically describes the setup assumed by the
> document. The descriptions before there hint at a presumed setup but a new
> section that clearly states the setup would be helpful. (the setup appears to
> be one where all network traffic to and from a protected entity flows through a
> DDoS mitigation service provider.  The provider includes one or more DOTS
> servers.  The protected entity includes one or more DOTS clients that
> communicate with the DOTS servers)

Just to double-check: you think that the reference to
draft-ietf-dots-architecture is insufficient in this regard?

Thanks,

Ben

> Requirement SIG-005 addresses channel redirection – maybe there needs to be a
> way that clients can move to a new server on their own if they lose hearbeat
> from the server they were using – that might include a way for a server to
> provide a list of alternative servers to the clients
> 
> 


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Date: Sun, 25 Nov 2018 15:17:34 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
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Subject: Re: [Dots] Tsvart last call review of draft-ietf-dots-requirements-16
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Hi Joe,

On Sat, Nov 17, 2018 at 05:39:22PM -0800, Joseph Touch wrote:
> Reviewer: Joseph Touch
> Review result: Ready with Issues

[reformatted for readability]

> Transport issues:
> - The GEN requirements refer to signal and data channels; it should be more
> clear that these would be transport associations or connections, not
> necessarily separate port assignments
>
> - GEN-03 recommends transports that avoid
> HOL blocking, but that blocking can occur at any protocol layer (e.g., when
> using TCP as a tunneling layer or at the application layer)

Is the concern about "conveyed over a transport not susceptible"?  I don't
think that one needs to read "transport" as "lowest level transport
protocol" here and it would equally apply to any tunneling layer.

> - SIG-001 – PLPMTUD
> should be used instead of PMTUD; PMTUD (relying on ICMP, which is often blocked
> and remains insecure) should be avoided. The PMTU of 1280 is relevant only for
> IPv6. The use of 576 should be more clearly indicated as applying only to IPv4.
> (note there is emerging PLPMTUD for UDP).

The IPv4 text is phrased as it currently is since there may be tunneling
scenarios that go over IPv4 at some intermediate link even if the endpoints
are speaking IPv6.

With respect to PMTU vs. PLPMTU, can you give any guidance on whether the
literl 1280 and 576 values are equally valid for assumed PLPMTU as for
"true" PMTU?

> - SIG-004 should address the use of
> TCP keepalives for TCP connections as a way to achieve heartbeats.

I don't believe that there is an IETF consensus position about what layer
is best for performing heartbeats; see the "statement regarding keepalives"
thread.  In particular, since this signal channel is going to support
non-TCP transports and prefers UDP over TCP, it will need its own heartbeat
mechanism anyway, at which point the TCP-layer functionality is going to be
fairly redundant.

> - SIG-004 is
> self-contradictory, at first claiming that agents SHOULD avoid termination due
> to heartbeat loss then later saying they MAY use heartbeat absence as
> indication of defunct connections. Even though SHOULD and MAY can be used
> together this way, the advise is confusing. This is a case (see below) where
> the reasoning behind exceptions to SHOULDs are needed -- but the MAY clause is
> a far too trivial (and, based on our experience with BGP, incorrect) condition

Can you double-check this?  My read is that there are two factors involved
and we are only giving guidance on two quadrants of the truth table, with
the two factors being "failing to receive heartbeats" and "attack traffic
is present".  (The attack traffic is assumed to be swamping other traffic,
but when there is no attack traffic the heartbeats should be more
reliable.)

> - DATA-002 should suggest protocols for security, at least indicating whether
> these need to be at a particular protocol layer (IP, transport, application),
> etc.

I think it's fine for a requirements document to limit itself to the actual
cryptographic requirements.  FWIW, the current data-channel spec is using
TLS.

-Ben

> Other issues:
> - the document uses SHOULD without qualifying the conditions for exception
>
> Nits
> - the abstract is too brief
> - Several requirements suggest that use of TCP avoids the need for separate
> congestion control; the same should be mentioned of SCTP and DCCP.
>
>


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From: Joe Touch <touch@strayalpha.com>
In-Reply-To: <20181125211734.GE70217@kduck.kaduk.org>
Date: Sun, 25 Nov 2018 21:08:39 -0800
Cc: tsv-art <tsv-art@ietf.org>, draft-ietf-dots-requirements.all@ietf.org, ietf@ietf.org, dots@ietf.org
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Subject: Re: [Dots] [Tsv-art] Tsvart last call review of draft-ietf-dots-requirements-16
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Hi, Benjamin,

> On Nov 25, 2018, at 1:17 PM, Benjamin Kaduk <kaduk@mit.edu> wrote:
>=20
> Hi Joe,
>=20
> On Sat, Nov 17, 2018 at 05:39:22PM -0800, Joseph Touch wrote:
>> Reviewer: Joseph Touch
>> Review result: Ready with Issues
>=20
> [reformatted for readability]
>=20
>> Transport issues:
>> - The GEN requirements refer to signal and data channels; it should =
be more
>> clear that these would be transport associations or connections, not
>> necessarily separate port assignments
>>=20
>> - GEN-03 recommends transports that avoid
>> HOL blocking, but that blocking can occur at any protocol layer =
(e.g., when
>> using TCP as a tunneling layer or at the application layer)
>=20
> Is the concern about "conveyed over a transport not susceptible"?  I =
don't
> think that one needs to read "transport" as "lowest level transport
> protocol" here and it would equally apply to any tunneling layer.

The point is that avoiding HOL blocking at one layer may have no impact =
on HOL blocking at another layer. If HOL blocking is a significant =
problem, it needs to be noted that this can happen at many places in the =
stack, not just at the transport layer.

>=20
>> - SIG-001 =E2=80=93 PLPMTUD
>> should be used instead of PMTUD; PMTUD (relying on ICMP, which is =
often blocked
>> and remains insecure) should be avoided. The PMTU of 1280 is relevant =
only for
>> IPv6. The use of 576 should be more clearly indicated as applying =
only to IPv4.
>> (note there is emerging PLPMTUD for UDP).
>=20
> The IPv4 text is phrased as it currently is since there may be =
tunneling
> scenarios that go over IPv4 at some intermediate link even if the =
endpoints
> are speaking IPv6.

That should be made more explicit.

> With respect to PMTU vs. PLPMTU, can you give any guidance on whether =
the
> literl 1280 and 576 values are equally valid for assumed PLPMTU as for
> "true" PMTU?

These are independent issues. The MTU minimums are set by the protocols; =
the MTU used on a given path is discovered by PMTUD or PLPMTUD; the =
former is not as reliable as the latter, due to ICMP blocking.

>=20
>> - SIG-004 should address the use of
>> TCP keepalives for TCP connections as a way to achieve heartbeats.
>=20
> I don't believe that there is an IETF consensus position about what =
layer
> is best for performing heartbeats; see the "statement regarding =
keepalives"
> thread. =20

There=E2=80=99s a lot of misundestanding on this issue. Keepalives can =
be needed at multiple layers; a keep alive at one layer is never a =
direct substitute for a keep alive at another layer. If keepalives are =
enabled at multiple layers, they should never need to interfere, though =
- they basically disable keepalives at lower layer ONLY when they are =
frequent enough relative to that lower layer.

> In particular, since this signal channel is going to support
> non-TCP transports and prefers UDP over TCP, it will need its own =
heartbeat
> mechanism anyway, at which point the TCP-layer functionality is going =
to be
> fairly redundant.

It depends on whether you also need TCP to keep active state. If so, =
turning TCP keepalives on would not necessarily interfere with app-layer =
keepalives; it would serve its own purpose.

Again, the error is thinking that keealives at one layer either avoid =
the need for keepalives at another layer OR interfere per se; correctly =
implemented, they do not interfere even when enabled at multiple layers.

>=20
>> - SIG-004 is
>> self-contradictory, at first claiming that agents SHOULD avoid =
termination due
>> to heartbeat loss then later saying they MAY use heartbeat absence as
>> indication of defunct connections. Even though SHOULD and MAY can be =
used
>> together this way, the advise is confusing. This is a case (see =
below) where
>> the reasoning behind exceptions to SHOULDs are needed -- but the MAY =
clause is
>> a far too trivial (and, based on our experience with BGP, incorrect) =
condition
>=20
> Can you double-check this?  My read is that there are two factors =
involved
> and we are only giving guidance on two quadrants of the truth table, =
with
> the two factors being "failing to receive heartbeats" and "attack =
traffic
> is present".  (The attack traffic is assumed to be swamping other =
traffic,
> but when there is no attack traffic the heartbeats should be more
> reliable.)

You need to explain these as a SINGLE recommendation. Putting =
contradictory advice in different places makes it confusing to determine =
how it is applied.

>=20
>> - DATA-002 should suggest protocols for security, at least indicating =
whether
>> these need to be at a particular protocol layer (IP, transport, =
application),
>> etc.
>=20
> I think it's fine for a requirements document to limit itself to the =
actual
> cryptographic requirements.

If you have something in mind that exists, say it. If not, then assume =
it will be incorrectly interpreted as suggesting something you didn=E2=80=99=
t have in mind.

IMO, better to avoid the ambiguity, i.e., to actually include the =
following to explain that TLS is sufficient:

>  FWIW, the current data-channel spec is using
> TLS.
>=20
> -Ben
>=20
>> Other issues:
>> - the document uses SHOULD without qualifying the conditions for =
exception
>>=20
>> Nits
>> - the abstract is too brief
>> - Several requirements suggest that use of TCP avoids the need for =
separate
>> congestion control; the same should be mentioned of SCTP and DCCP.
>>=20
>>=20
>=20
> _______________________________________________
> Tsv-art mailing list
> Tsv-art@ietf.org
> https://www.ietf.org/mailman/listinfo/tsv-art


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
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Subject: Re: [Dots] Opsdir last call review of draft-ietf-dots-requirements-16
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Jon Shallow <supjps-ietf@jpshallow.com>, "'Panwei (William)'" <william.panwei@huawei.com>, "dots@ietf.org" <dots@ietf.org>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "'kaname nishizuka'" <kaname@nttv6.jp>
Thread-Topic: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Date: Mon, 26 Nov 2018 06:06:18 +0000
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References: <30E95A901DB42F44BA42D69DB20DFA6A608D45C7@nkgeml513-mbx.china.huawei.com> <04c401d4831d$59c749b0$0d55dd10$@jpshallow.com>
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, "'Panwei (William)'" <william.panwei@huawei.com>, "dots@ietf.org" <dots@ietf.org>, "'kaname nishizuka'" <kaname@nttv6.jp>
Thread-Topic: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Date: Mon, 26 Nov 2018 06:41:22 +0000
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Scott Bradner" <sob@sobco.com>, "ops-dir@ietf.org" <ops-dir@ietf.org>
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Thread-Topic: Opsdir last call review of draft-ietf-dots-requirements-16
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From nobody Mon Nov 26 00:33:39 2018
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, Jon Shallow <supjps-ietf@jpshallow.com>, "'Panwei (William)'" <william.panwei@huawei.com>, "dots@ietf.org" <dots@ietf.org>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>
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From: kaname nishizuka <kaname@nttv6.jp>
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Hi Jon,

Yes, I agree with Tiru.
I can hit upon an example that ACLs are implemented on a router in front =
of a mitigator.
In this case, keeping the model of ACLs to be same as the draft-ietf-netm=
od-acl-model will make deployment easier.

regards,
Kaname


On 2018/11/26 15:06, Konda, Tirumaleswar Reddy wrote:
>
> Hi Jon,
>
> If the DOTS client believes the traffic from the accept-list sources wi=
ll not attack its targets, it configures the accept-list filtering rules.=
 The draft-nishizuka-dots-signal-control-filtering is =C2=A0dealing with =
an attack scenario where the accept-list sources are either spoofed or co=
mpromised to attack the target.
>
> Irrespective of whether accept-list rules are configured or not, all in=
coming traffic will be scrubbed and the DOTS client will be notified if t=
he accept-list sources are attacking target. It is then up to the DOTS cl=
ient to make a call and de-activate the accept-list rules.
>
> The DOTS client with DDoS detection capability can also identify and de=
-activate the accept-list rules during attack even without the conflict n=
otification from the DOTS server.
>
> Since all traffic to the target will anyway be scrubbed during DDoS mit=
igation, I don=E2=80=99t see the need to configure a =E2=80=9Caccept+miti=
gate=E2=80=9D. =C2=A0The =E2=80=9Cno action=E2=80=9D does not mean the tr=
affic (not matching the filtering rules) will by-pass scrubbing by the DD=
oS mitigator.
>
> Cheers,
>
> -Tiru
>
> *From:*Jon Shallow <supjps-ietf@jpshallow.com>
> *Sent:* Friday, November 23, 2018 4:42 PM
> *To:* 'Panwei (William)' <william.panwei@huawei.com>; dots@ietf.org; mo=
hamed.boucadair@orange.com; Konda, Tirumaleswar Reddy <TirumaleswarReddy_=
Konda@McAfee.com>; 'kaname nishizuka' <kaname@nttv6.jp>
> *Subject:* RE: [Dots] Suggestions about draft-nishizuka-dots-signal-con=
trol-filtering
>
> *CAUTION*:External email. Do not click links or open attachments unless=
 you recognize the sender and know the content is safe.
>
> -----------------------------------------------------------------------=
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-------------------------------------------------------------------------=
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-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
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-------------------------------------------------------------------------=
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>
> Hi There,
>
> This thread has flagged up to me that we are trying to represent a tri-=
state of actions (=E2=80=9Calways-drop=E2=80=9D, =E2=80=9Calways-let-thro=
ugh=E2=80=9D and =E2=80=9Clet-through-if-after-being-mitigated-it-is-allo=
wed=E2=80=9D) with a duo-state of =E2=80=9Caccept-list=E2=80=9D and =E2=80=
=9Cdrop-list=E2=80=9D in the (Data Channel) ACLs.
>
> The traditional ACL is a set of match criteria and then an appropriate =
action if matched.
>
> [As a separate note, picked up later, it has always been unclear in my =
mind over many years as to what happens if a packet does not trigger a ma=
tch in any of the ACLs (falls off the end of the list). =C2=A0What happen=
s is usually defined by documentation of what actually happens in the und=
erlying logic.=C2=A0 The Data Channel currently states =E2=80=9CIf there =
is *no match*, then there is *no action* to be taken against the packet.=E2=
=80=9D.]
>
> The Data Channel only defines the DOTS forwarding actions as =E2=80=98a=
ccept=E2=80=99 or =E2=80=98drop=E2=80=99 with the addition of =E2=80=98ra=
te-limit=E2=80=99 if =E2=80=98accept=E2=80=99 is defined.
>
> It does state that, as an example, =E2=80=9CAccept-list management, whi=
ch enables a DOTS client to inform a DOTS server about sources from which=
 traffic should always be accepted=E2=80=9D which implies that =E2=80=98a=
ccept=E2=80=99 is the same as what we knew as white-list.=C2=A0 However, =
=E2=80=98accept=E2=80=99 means just that =E2=80=93 it is accepted at this=
 point in the process.=C2=A0 Yes, it is effectively defined as a white li=
st in the requirements document, but even though those working with the D=
OTS documents can get confused as they also are thinking about mitigate o=
r mitigation [Is it accepted for mitigation, or is it unconditionally acc=
epted?].
>
> We need the DOTS server to clearly understand the tri-state, and =C2=A0=
cause (how is out of scope) traffic to be always accepted, always dropped=
 or be analysed to see if it needs to be mitigated.
>
> In terms of moving forward, we could (in Data Channel) have an addition=
al =E2=80=98leaf mitigate=E2=80=99 in =E2=80=98container actions=E2=80=99=
 which is only available when =E2=80=98accept=E2=80=99.=C2=A0 If true, tr=
affic is passed to a mitigator (how out of scope), if false traffic is al=
ways passed through. (=E2=80=98leaf rate-limit=E2=80=99 is a special case=
 of mitigation I guess.)
>
> Alternatively, we could have actions of =E2=80=98accept=E2=80=99, =E2=80=
=98drop=E2=80=99 or =E2=80=98mitigate=E2=80=99.=C2=A0 =E2=80=98accept=E2=80=
=99 would then have the traditional meaning of pass =E2=80=93 effectively=
 a white-list as previously intended, and =E2=80=98mitigate=E2=80=99 much=
 clearer to the reader as to the intent.=C2=A0 Then we just need a defini=
tion for =E2=80=9CMitigate-List:=E2=80=9D.=C2=A0 I think =E2=80=98rate-li=
mit=E2=80=99 would then have to only be associated with =E2=80=98mitigate=
=E2=80=99, not =E2=80=98accept=E2=80=99 as =E2=80=98accept=E2=80=99 is wh=
itelist(no expected additional action).
>
> Using =E2=80=98accept=E2=80=99, =E2=80=98drop=E2=80=99 or =E2=80=98miti=
gate=E2=80=99 (or =E2=80=98accept + mitigate=E2=80=99, =E2=80=98accept + =
no-mitigate=E2=80=99 or =E2=80=98drop=E2=80=99 if going with the addition=
al leaf suggestion) makes it much easier to directly instantiate these ac=
tions in the DOTS server environment.
>
> That then just leaves the question of what happens if there are no ACL =
matches (there could be no ACLs defined).=C2=A0 Do we go for an implied l=
ast ACL of all other traffic is to be mitigated if mitigating (Signal cha=
nnel request), or do we take =E2=80=98no action=E2=80=99 as defined in th=
e Data Channel?
>
> Regards
>
> Jon
>
> *From:*Dots [mailto: dots-bounces@ietf.org <mailto:dots-bounces@ietf.or=
g>] *On Behalf Of *Panwei (William)
> *Sent:* 23 November 2018 08:25
> *To:* Konda, Tirumaleswar Reddy; mohamed.boucadair@orange.com <mailto:m=
ohamed.boucadair@orange.com>
> *Cc:* dots@ietf.org <mailto:dots@ietf.org>; kaname nishizuka
> *Subject:* Re: [Dots] Suggestions about draft-nishizuka-dots-signal-con=
trol-filtering
>
> Hi Tiru, Med,
>
> Thank you for explaining and reminding me. I just remembered that this =
terminology has already been described in the requirement draft.
>
> Accept-list: A list of filters indicating sources from which traffic
>
> should always be allowed, regardless of contradictory data gleaned
>
> in a detected attack.
>
> Best Regards
>
> Wei Pan
>
> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:*Konda, Tirumaleswar Reddy [mailto:Tirum=
aleswarReddy_Konda@McAfee.com]
> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:*2018=E5=B9=B411=E6=9C=8823=E6=97=
=A516:07
> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:*mohamed.boucadair@orange.com <mailto:mo=
hamed.boucadair@orange.com>; Panwei (William) <william.panwei@huawei.com =
<mailto:william.panwei@huawei.com>>; kaname nishizuka <kaname@nttv6.jp <m=
ailto:kaname@nttv6.jp>>
> *=E6=8A=84=E9=80=81**:*dots@ietf.org <mailto:dots@ietf.org>
> *=E4=B8=BB=E9=A2=98**:*RE: Suggestions about draft-nishizuka-dots-signa=
l-control-filtering
>
> If accept-listed sources are attacking the target, the DOTS server cann=
ot turn-off the accept-list filtering rules without the consent from the =
DOTS client. DOTS server can inform the DOTS client of the conflict and/o=
r the DOTS client with DDoS detection capability can identify the attack,=
 and using the signal channel de-activate the accept-list filtering rules=
=2E
>
> =E2=80=9Caccept-list=E2=80=9D does not mean only the traffic matching t=
he accept-list will be allowed to reach the target.
>
> Cheers,
>
> -Tiru
>
> *From:*Dots <dots-bounces@ietf.org <mailto:dots-bounces@ietf.org>> *On =
Behalf Of *mohamed.boucadair@orange.com <mailto:mohamed.boucadair@orange.=
com>
> *Sent:* Friday, November 23, 2018 12:04 PM
> *To:* Panwei (William) <william.panwei@huawei.com <mailto:william.panwe=
i@huawei.com>>; kaname nishizuka <kaname@nttv6.jp <mailto:kaname@nttv6.jp=
>>
> *Cc:* dots@ietf.org <mailto:dots@ietf.org>
> *Subject:* Re: [Dots] Suggestions about draft-nishizuka-dots-signal-con=
trol-filtering
>
> *CAUTION*:External email. Do not click links or open attachments unless=
 you recognize the sender and know the content is safe.
>
> -----------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
-------------------------------------------------------------------------=
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-------------------------------------------
>
> Hi Wei,
>
> Please see inline.
>
> Cheers,
>
> Med
>
> *De=C2=A0:*Dots [mailto:dots-bounces@ietf.org] *De la part de* Panwei (=
William)
> *Envoy=C3=A9=C2=A0:* vendredi 23 novembre 2018 04:09
> *=C3=80=C2=A0:* kaname nishizuka
> *Cc=C2=A0:* dots@ietf.org <mailto:dots@ietf.org>
> *Objet=C2=A0:* [Dots] Suggestions about draft-nishizuka-dots-signal-con=
trol-filtering
>
> Hi Kaname,
>
> I have read your draft recently, and I have two suggestions about it.
>
> 1.I=E2=80=99d like to suggest using =E2=80=9Cwhitelist=E2=80=9D or =E2=80=
=9CDDoS detection whitelist=E2=80=9D instead of =E2=80=9Caccept-list=E2=80=
=9D in the typical case.
>
> [Med] accept-list means white-list. accept-list is already used in DOTS=
 requirements and data channel. The signal channel will make use of that =
term too. FWIW, that change is made because of what was reported by hrpc.=

>
> A typical case is a DOTS client which configures during peace time
>
> filtering rules using data channel to permit traffic from accept-
>
> listed sources, but during the volumetric DDoS attack the DDoS
>
> mitigator identifies the source addresses/prefixes in the accept-
>
> listed filtering rules are attacking the target. For example, an
>
> attacker can spoof the IP addresses of accept-listed sources to
>
> generate attack traffic or the attacker can compromise the accept-
>
> listed sources and program them to launch DDoS attack.
>
> In this typical case, when you use =E2=80=9Caccept-list=E2=80=9D, it so=
unds like that only the traffic which match the accept-list can reach the=
 target. I don=E2=80=99t know if you mean so, but if YES, I feel like the=
 extension may not be essentially needed in such case. Because if a DDoS =
attack occurs in such situation, the attacker must have been included in =
the accept-list. The DOTS server can get this conclusion as the DOTS clie=
nt can, so the DOTS server can de-activate the accept-list by its own wit=
hout DOTS client=E2=80=99s request of filtering rules.
>
> In my opinion, =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS detection w=
hitelist=E2=80=9D is more suitable than =C2=A0=E2=80=9Caccept-list=E2=80=9D=
=2E Because it indicates that the traffic which doesn=E2=80=99t match the=
 DDoS whitelist can also reach the target, as long as it passes the detec=
tion. And if a DDoS attack happens, the DOTS server can=E2=80=99t know if=
 the attacker is in the whitelist. If DOTS client find that the attacker =
is included in the DDoS whitelist, it must request the DOTS server to de-=
activate the whitelist.
>
> I=E2=80=99m not object to your case, I just want to make it clear and n=
o misunderstanding.
>
> 2. I=E2=80=99d like to suggest adding a guideline or suggestion about u=
sing signal channel to control filtering rules.
>
> The purpose of using DOTS signal channel to control filtering rules is =
trying to help mitigate the DDoS attack when under attack time. This purp=
ose should also be the guideline.
>
> Requests which can help mitigate the attack should be send by the signa=
l channel immediately. Requests which can=E2=80=99t help mitigate the att=
ack should wait for the data channel to be re-established and then be sen=
t by the data channel.
>
> For example, during attack time, de-activating a drop-list (or blacklis=
t) or activating a accept-list (or whitelist) may usually not help mitiga=
te the DDoS attack. So If there is no necessary reason, these two request=
s should wait for using the data channel.
>
> [Med] Agree. We do have the following in -01:
>
> A DOTS client relies on the information received from the DOTS server
>
> and/or local information to the DOTS client domain to trigger a
>
> filter control request.=C2=A0 Obviously, only filters that are pertinen=
t
>
> for an ongoing mitigation should be controlled by a DOTS client using
>
> the DOTS signal channel.
>
> And
>
> The DOTS client can also decide to send a PUT request to deactivate
>
> the "an-accept-list" ACL, if suspect traffic is received from an
>
> accept-listed source (2001:db8:1234::/48).=C2=A0 The structure of that =
PUT
>
> is the same as the one shown in Figure 4.
>
> Best Regards
>
> Wei Pan
>
> *=E5=8F=91=E4=BB=B6=E4=BA=BA**:*Dots [mailto:dots-bounces@ietf.org] *=E4=
=BB=A3=E8=A1=A8 *kaname nishizuka
> *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4**:*2018=E5=B9=B411=E6=9C=8821=E6=97=
=A59:50
> *=E6=94=B6=E4=BB=B6=E4=BA=BA**:*dots@ietf.org <mailto:dots@ietf.org>
> *=E4=B8=BB=E9=A2=98**:*[Dots] Fwd: I-D Action: draft-nishizuka-dots-sig=
nal-control-filtering-00.txt
>
> Hi,
>
> Base on the discussion of Bangkok interop: control data channel filteri=
ng via signal channel,
> we've submitted the new draft for an extension to the DOTS signal chann=
el to control the filtering rules during attack mitigation.
>
> thanks,
> Kaname Nishizuka
>
>
>
> -------- Forwarded Message --------
>
> *Subject: *
>
> =09
>
> I-D Action: draft-nishizuka-dots-signal-control-filtering-00.txt
>
> *Date: *
>
> =09
>
> Tue, 20 Nov 2018 17:42:13 -0800
>
> *From: *
>
> =09
>
> internet-drafts@ietf.org <mailto:internet-drafts@ietf.org>
>
> *Reply-To: *
>
> =09
>
> internet-drafts@ietf.org <mailto:internet-drafts@ietf.org>
>
> *To: *
>
> =09
>
> i-d-announce@ietf.org <mailto:i-d-announce@ietf.org>
>
> A New Internet-Draft is available from the on-line Internet-Drafts dire=
ctories.
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Title=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 : Controlling Filtering Rules Using =
DOTS Signal Channel
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Authors=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 : Kaname Nishizuka
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 Takahiko Nagata
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 Tirumaleswar Reddy
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 Mohamed Boucadair
> =C2=A0=C2=A0=C2=A0 Filename=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 :=
 draft-nishizuka-dots-signal-control-filtering-00.txt
> =C2=A0=C2=A0=C2=A0 Pages=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 : 11
> =C2=A0=C2=A0=C2=A0 Date=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 : 2018-11-20
> Abstract:
> =C2=A0=C2=A0 This document specifies an extension to the DOTS signal ch=
annel to
> =C2=A0=C2=A0 control the filtering rules during attack mitigation.
> =C2=A0=C2=A0 This extension allows a DOTS client to activate or de-acti=
vate
> =C2=A0=C2=A0 filtering rules during a DDoS attack.=C2=A0 The characteri=
zation of these
> =C2=A0=C2=A0 filters is supposed to be conveyed by a DOTS client during=
 peace time
> =C2=A0=C2=A0 by means of DOTS data channel.
> Editorial Note (To be removed by RFC Editor)
> =C2=A0=C2=A0 Please update these statements within the document with th=
e RFC
> =C2=A0=C2=A0 number to be assigned to this document:
> =C2=A0=C2=A0 o=C2=A0 "This version of this YANG module is part of RFC X=
XXX;"
> =C2=A0=C2=A0 o=C2=A0 "RFC XXXX: Controlling Filtering Rules Using DOTS =
Signal Channel";
> =C2=A0=C2=A0 o=C2=A0 reference: RFC XXXX
> =C2=A0=C2=A0 o=C2=A0 [RFCXXXX]
> =C2=A0=C2=A0 Please update these statements with the RFC number to be a=
ssigned to
> =C2=A0=C2=A0 the following documents:
> =C2=A0=C2=A0 o=C2=A0 "RFC SSSS: Distributed Denial-of-Service Open Thre=
at Signaling
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (DOTS) Signal Channel Specification" (us=
ed to be
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 [I-D.ietf-dots-signal-channel])
> =C2=A0=C2=A0 o=C2=A0 "RFC DDDD: Distributed Denial-of-Service Open Thre=
at Signaling
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (DOTS) Data Channel Specification" (used=
 to be
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 [I-D.ietf-dots-data-channel])
> =C2=A0=C2=A0 Please update the "revision" date of the YANG module.
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-fi=
ltering/
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filteri=
ng-00
> https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-contr=
ol-filtering-00
> Please note that it may take a couple of minutes from the time of submi=
ssion
> until the htmlized version and diff are available at tools.ietf.org.
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org <mailto:I-D-Announce@ietf.org>
> https://www.ietf..org/mailman/listinfo/i-d-announce <https://www.ietf.o=
rg/mailman/listinfo/i-d-announce>
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt


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    Hi Jon,<br>
    <br>
    Yes, I agree with Tiru.<br>
    I can hit upon an example that ACLs are implemented on a router in
    front of a mitigator.<br>
    In this case, keeping the model of ACLs to be same as the
    draft-ietf-netmod-acl-model will make deployment easier.<br>
    <br>
    regards,<br>
    Kaname<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 2018/11/26 15:06, Konda,
      Tirumaleswar Reddy wrote:<br>
    </div>
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      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Hi
            Jon,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">If
            the DOTS client believes the traffic from the accept-list
            sources will not attack its targets, it configures the
            accept-list filtering rules. The
            draft-nishizuka-dots-signal-control-filtering is  dealing
            with an attack scenario where the accept-list sources are
            either spoofed or compromised to attack the target.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Irrespective
            of whether accept-list rules are configured or not, all
            incoming traffic will be scrubbed and the DOTS client will
            be notified if the accept-list sources are attacking target.
            It is then up to the DOTS client to make a call and
            de-activate the accept-list rules.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">The
            DOTS client with DDoS detection capability can also identify
            and de-activate the accept-list rules during attack even
            without the conflict notification from the DOTS server. <o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Since
            all traffic to the target will anyway be scrubbed during
            DDoS mitigation, I don’t see the need to configure a
            “accept+mitigate”.  The “no action” does not mean the
            traffic (not matching the filtering rules) will by-pass
            scrubbing by the DDoS mitigator.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Cheers,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">-Tiru<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">
                  Jon Shallow <a class="moz-txt-link-rfc2396E" href="mailto:supjps-ietf@jpshallow.com">&lt;supjps-ietf@jpshallow.com&gt;</a>
                  <br>
                  <b>Sent:</b> Friday, November 23, 2018 4:42 PM<br>
                  <b>To:</b> 'Panwei (William)'
                  <a class="moz-txt-link-rfc2396E" href="mailto:william.panwei@huawei.com">&lt;william.panwei@huawei.com&gt;</a>; <a class="moz-txt-link-abbreviated" href="mailto:dots@ietf.org">dots@ietf.org</a>;
                  <a class="moz-txt-link-abbreviated" href="mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com</a>; Konda, Tirumaleswar
                  Reddy <a class="moz-txt-link-rfc2396E" href="mailto:TirumaleswarReddy_Konda@McAfee.com">&lt;TirumaleswarReddy_Konda@McAfee.com&gt;</a>;
                  'kaname nishizuka' <a class="moz-txt-link-rfc2396E" href="mailto:kaname@nttv6.jp">&lt;kaname@nttv6.jp&gt;</a><br>
                  <b>Subject:</b> RE: [Dots] Suggestions about
                  draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <div>
            <table class="MsoNormalTable"
              style="background:#F3FF33;border:solid #9B9A87 1.5pt"
              cellpadding="0" border="1">
              <tbody>
                <tr>
                  <td style="border:none;padding:.75pt .75pt .75pt
                    .75pt">
                    <p><strong><span
                          style="font-family:&quot;Arial&quot;,sans-serif;color:#9B8B3E">CAUTION</span></strong><span
style="font-family:&quot;Arial&quot;,sans-serif;color:#9B8B3E">:</span><span
style="font-family:&quot;Arial&quot;,sans-serif;color:black"> External
                        email. Do not click links or open attachments
                        unless you recognize the sender and know the
                        content is safe.</span><span
                        style="font-family:&quot;Arial&quot;,sans-serif"><o:p></o:p></span></p>
                  </td>
                </tr>
              </tbody>
            </table>
            <div class="MsoNormal" style="text-align:center"
              align="center"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"
                lang="EN-GB">
                <hr size="2" align="center" width="100%">
              </span></div>
          </div>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">Hi There,<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">This thread has flagged up to me that we are
              trying to represent a tri-state of actions (“always-drop”,
              “always-let-through” and
              “let-through-if-after-being-mitigated-it-is-allowed”) with
              a duo-state of “accept-list” and “drop-list” in the (Data
              Channel) ACLs.<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">The traditional ACL is a set of match
              criteria and then an appropriate action if matched. 
              <o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">[As a separate note, picked up later, it has
              always been unclear in my mind over many years as to what
              happens if a packet does not trigger a match in any of the
              ACLs (falls off the end of the list).  What happens is
              usually defined by documentation of what actually happens
              in the underlying logic.  The Data Channel currently
              states “If there is
              <b>no match</b>, then there is <b>no action</b> to be
              taken against the packet.”.]<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">The Data Channel only defines the DOTS
              forwarding actions as ‘accept’ or ‘drop’ with the addition
              of ‘rate-limit’ if ‘accept’ is defined.<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">It does state that, as an example,
              “Accept-list management, which enables a DOTS client to
              inform a DOTS server about sources from which traffic
              should always be accepted” which implies that ‘accept’ is
              the same as what we knew as white-list.  However, ‘accept’
              means just that – it is accepted at this point in the
              process.  Yes, it is effectively defined as a white list
              in the requirements document, but even though those
              working with the DOTS documents can get confused as they
              also are thinking about mitigate or mitigation [Is it
              accepted for mitigation, or is it unconditionally
              accepted?].<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">We need the DOTS server to clearly understand
              the tri-state, and  cause (how is out of scope) traffic to
              be always accepted, always dropped or be analysed to see
              if it needs to be mitigated.<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">In terms of moving forward, we could (in Data
              Channel) have an additional ‘leaf mitigate’ in ‘container
              actions’ which is only available when ‘accept’.  If true,
              traffic is passed to a mitigator (how out of scope), if
              false traffic is always passed through. (‘leaf rate-limit’
              is a special case of mitigation I guess.)<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">Alternatively, we could have actions of
              ‘accept’, ‘drop’ or ‘mitigate’.  ‘accept’ would then have
              the traditional meaning of pass – effectively a white-list
              as previously intended, and ‘mitigate’ much clearer to the
              reader as to the intent.  Then we just need a definition
              for “Mitigate-List:”.  I think ‘rate-limit’ would then
              have to only be associated with ‘mitigate’, not ‘accept’
              as ‘accept’ is whitelist(no expected additional action).<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">Using ‘accept’, ‘drop’ or ‘mitigate’ (or
              ‘accept + mitigate’, ‘accept + no-mitigate’ or ‘drop’ if
              going with the additional leaf suggestion) makes it much
              easier to directly instantiate these actions in the DOTS
              server environment.<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">That then just leaves the question of what
              happens if there are no ACL matches (there could be no
              ACLs defined).  Do we go for an implied last ACL of all
              other traffic is to be mitigated if mitigating (Signal
              channel request), or do we take ‘no action’ as defined in
              the Data Channel?<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">Regards<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB">Jon<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"
              lang="EN-GB"><o:p> </o:p></span></p>
          <div>
            <div style="border:none;border-top:solid #B5C4DF
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:windowtext">
                  Dots [mailto:
                  <a href="mailto:dots-bounces@ietf.org"
                    moz-do-not-send="true">dots-bounces@ietf.org</a>] <b>On
                    Behalf Of
                  </b>Panwei (William)<br>
                  <b>Sent:</b> 23 November 2018 08:25<br>
                  <b>To:</b> Konda, Tirumaleswar Reddy; <a
                    href="mailto:mohamed.boucadair@orange.com"
                    moz-do-not-send="true">
                    mohamed.boucadair@orange.com</a><br>
                  <b>Cc:</b> <a href="mailto:dots@ietf.org"
                    moz-do-not-send="true">dots@ietf.org</a>; kaname
                  nishizuka<br>
                  <b>Subject:</b> Re: [Dots] Suggestions about
                  draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
              style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Hi
              Tiru, Med,<o:p></o:p></span></p>
          <p class="MsoNormal"><span
              style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
              style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Thank
              you for explaining and reminding me. I just remembered
              that this terminology has already been described in the
              requirement draft.<o:p></o:p></span></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:24.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:2.0gd;text-autospace:none"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">Accept-list:
              A list of filters indicating sources from which traffic<o:p></o:p></span></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:24.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:2.0gd;text-autospace:none"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">should
              always be allowed, regardless of contradictory data
              gleaned<o:p></o:p></span></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:24.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:2.0gd"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">in a
              detected attack.</span><span
              style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p></o:p></span></p>
          <p class="MsoNormal"><span
              style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
          <div>
            <p class="MsoNormal" style="text-align:justify"><span
                style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Best
                Regards<o:p></o:p></span></p>
            <p class="MsoNormal" style="text-align:justify"><span
                style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Wei
                Pan<o:p></o:p></span></p>
          </div>
          <p class="MsoNormal"><span
              style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext"
                    lang="ZH-CN">发件人</span></b><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext">:</span></b><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext"> Konda,
                  Tirumaleswar Reddy [<a
                    href="mailto:TirumaleswarReddy_Konda@McAfee.com"
                    moz-do-not-send="true">mailto:TirumaleswarReddy_Konda@McAfee.com</a>]
                  <br>
                </span><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext"
                    lang="ZH-CN">发送时间</span></b><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext">:</span></b><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext"> 2018</span><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext" lang="ZH-CN">年</span><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext">11</span><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext" lang="ZH-CN">月</span><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext">23</span><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext" lang="ZH-CN">日</span><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext"> 16:07<br>
                </span><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext"
                    lang="ZH-CN">收件人</span></b><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext">:</span></b><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext">
                  <a href="mailto:mohamed.boucadair@orange.com"
                    moz-do-not-send="true">mohamed.boucadair@orange.com</a>;
                  Panwei (William) &lt;<a
                    href="mailto:william.panwei@huawei.com"
                    moz-do-not-send="true">william.panwei@huawei.com</a>&gt;;
                  kaname nishizuka &lt;<a href="mailto:kaname@nttv6.jp"
                    moz-do-not-send="true">kaname@nttv6.jp</a>&gt;<br>
                </span><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext"
                    lang="ZH-CN">抄送</span></b><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext">:</span></b><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext">
                  <a href="mailto:dots@ietf.org" moz-do-not-send="true">dots@ietf.org</a><br>
                </span><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext"
                    lang="ZH-CN">主题</span></b><b><span
                    style="font-size:11.0pt;font-family:&quot;Microsoft
                    YaHei&quot;,sans-serif;color:windowtext">:</span></b><span
                  style="font-size:11.0pt;font-family:&quot;Microsoft
                  YaHei&quot;,sans-serif;color:windowtext"> RE:
                  Suggestions about
                  draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><o:p> </o:p></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">If
              accept-listed sources are attacking the target, the DOTS
              server cannot turn-off the accept-list filtering rules
              without the consent from the DOTS client. DOTS server can
              inform the DOTS client of the conflict and/or the DOTS
              client with DDoS detection capability can identify the
              attack, and using the signal channel de-activate the
              accept-list filtering rules.<o:p></o:p></span></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">“accept-list”
              does not mean only the traffic matching the accept-list
              will be allowed to reach the target.
              <o:p></o:p></span></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Cheers,<o:p></o:p></span></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">-Tiru<o:p></o:p></span></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
          <div style="border:none;border-left:solid blue
            1.5pt;padding:0in 0in 0in 4.0pt">
            <div>
              <div style="border:none;border-top:solid #E1E1E1
                1.0pt;padding:3.0pt 0in 0in 0in">
                <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">
                    Dots &lt;<a href="mailto:dots-bounces@ietf.org"
                      moz-do-not-send="true">dots-bounces@ietf.org</a>&gt;
                    <b>On Behalf Of </b><a
                      href="mailto:mohamed.boucadair@orange.com"
                      moz-do-not-send="true">mohamed.boucadair@orange.com</a><br>
                    <b>Sent:</b> Friday, November 23, 2018 12:04 PM<br>
                    <b>To:</b> Panwei (William) &lt;<a
                      href="mailto:william.panwei@huawei.com"
                      moz-do-not-send="true">william.panwei@huawei.com</a>&gt;;
                    kaname nishizuka &lt;<a
                      href="mailto:kaname@nttv6.jp"
                      moz-do-not-send="true">kaname@nttv6.jp</a>&gt;<br>
                    <b>Cc:</b> <a href="mailto:dots@ietf.org"
                      moz-do-not-send="true">dots@ietf.org</a><br>
                    <b>Subject:</b> Re: [Dots] Suggestions about
                    draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p>
              </div>
            </div>
            <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><o:p> </o:p></p>
            <div>
              <table class="MsoNormalTable"
                style="margin-left:21.0pt;background:#F3FF33;border:solid
                #9B9A87 1.5pt" cellspacing="3" cellpadding="0"
                border="1">
                <tbody>
                  <tr>
                    <td style="border:none;padding:.75pt .75pt .75pt
                      .75pt">
                      <p><strong><span
                            style="font-family:&quot;Arial&quot;,sans-serif;color:#9B8B3E">CAUTION</span></strong><span
style="font-family:&quot;Arial&quot;,sans-serif;color:#9B8B3E">:</span><span
style="font-family:&quot;Arial&quot;,sans-serif;color:black"> External
                          email. Do not click links or open attachments
                          unless you recognize the sender and know the
                          content is safe.</span><span
                          style="font-family:&quot;Arial&quot;,sans-serif"><o:p></o:p></span></p>
                    </td>
                  </tr>
                </tbody>
              </table>
              <div style="margin-bottom:.05in">
                <div class="MsoNormal"
style="mso-margin-bottom-alt:auto;margin-left:21.0pt;mso-margin-bottom-alt:auto;mso-para-margin-left:1.75gd;text-align:center"
                  align="center">
                  <span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"
                    lang="FR">
                    <hr size="2" align="center" width="100%">
                  </span></div>
              </div>
            </div>
            <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                style="font-size:10.0pt;font-family:&quot;Courier
                New&quot;">Hi Wei, <o:p></o:p></span></p>
            <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                style="font-size:10.0pt;font-family:&quot;Courier
                New&quot;"><o:p> </o:p></span></p>
            <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                style="font-size:10.0pt;font-family:&quot;Courier
                New&quot;">Please see inline.<o:p></o:p></span></p>
            <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                style="font-size:10.0pt;font-family:&quot;Courier
                New&quot;"><o:p> </o:p></span></p>
            <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                style="font-size:10.0pt;font-family:&quot;Courier
                New&quot;">Cheers,<o:p></o:p></span></p>
            <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                style="font-size:10.0pt;font-family:&quot;Courier
                New&quot;">Med<o:p></o:p></span></p>
            <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                style="font-size:10.0pt;font-family:&quot;Courier
                New&quot;" lang="FR"><o:p> </o:p></span></p>
            <div style="border:none;border-left:solid blue
              1.5pt;padding:0in 0in 0in 4.0pt">
              <div>
                <div style="border:none;border-top:solid #B5C4DF
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:windowtext"
                        lang="FR">De :</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:windowtext"
                      lang="FR"> Dots [<a
                        href="mailto:dots-bounces@ietf.org"
                        moz-do-not-send="true">mailto:dots-bounces@ietf.org</a>]
                      <b>De la part de</b> Panwei (William)<br>
                      <b>Envoyé :</b> vendredi 23 novembre 2018 04:09<br>
                      <b>À :</b> kaname nishizuka<br>
                      <b>Cc :</b> <a href="mailto:dots@ietf.org"
                        moz-do-not-send="true">dots@ietf.org</a><br>
                      <b>Objet :</b> [Dots] Suggestions about
                      draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p>
                </div>
              </div>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  lang="FR"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Hi
                  Kaname,<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">I
                  have read your draft recently, and I have two
                  suggestions about it.<o:p></o:p></span></p>
              <p class="MsoListParagraph"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:93.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:6.25gd;text-indent:-.25in"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">1.</span><span
                  style="font-size:7.0pt;color:windowtext">     
                </span><span
                  style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">I’d
                  like to suggest using “whitelist” or “DDoS detection
                  whitelist” instead of “accept-list” in the typical
                  case.<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-family:&quot;Calibri&quot;,sans-serif"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">[Med] accept-list means white-list.
                  accept-list is already used in DOTS requirements and
                  data channel. The signal channel will make use of that
                  term too. FWIW, that change is made because of what
                  was reported by hrpc. <o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:45.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.75gd;text-autospace:none"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">A typical
                  case is a DOTS client which configures during peace
                  time<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:45.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.75gd;text-autospace:none"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">filtering
                  rules using data channel to permit traffic from
                  accept-<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:45.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.75gd;text-autospace:none"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">listed
                  sources, but during the volumetric DDoS attack the
                  DDoS<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:45.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.75gd;text-autospace:none"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">mitigator
                  identifies the source addresses/prefixes in the
                  accept-<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:45.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.75gd;text-autospace:none"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">listed
                  filtering rules are attacking the target. For example,
                  an<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:45.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.75gd;text-autospace:none"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">attacker
                  can spoof the IP addresses of accept-listed sources to<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:45.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.75gd;text-autospace:none"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">generate
                  attack traffic or the attacker can compromise the
                  accept-<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:45.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.75gd"><span
style="font-size:10.0pt;font-family:Courier;color:windowtext">listed
                  sources and program them to launch DDoS attack.</span><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">In
                  this typical case, when you use “accept-list”, it
                  sounds like that only the traffic which match the
                  accept-list can reach the target. I don’t know if you
                  mean so, but if YES, I feel like the extension may not
                  be essentially needed in such case. Because if a DDoS
                  attack occurs in such situation, the attacker must
                  have been included in the accept-list. The DOTS server
                  can get this conclusion as the DOTS client can, so the
                  DOTS server can de-activate the accept-list by its own
                  without DOTS client’s request of filtering rules. <o:p>
                  </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">In
                  my opinion, “whitelist” or “DDoS detection whitelist”
                  is more suitable than  “accept-list”. Because it
                  indicates that the traffic which doesn’t match the
                  DDoS whitelist can also reach the target, as long as
                  it passes the detection. And if a DDoS attack happens,
                  the DOTS server can’t know if the attacker is in the
                  whitelist. If DOTS client find that the attacker is
                  included in the DDoS whitelist, it must request the
                  DOTS server to de-activate the whitelist.<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">I’m
                  not object to your case, I just want to make it clear
                  and no misunderstanding.<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">2.
                  I’d like to suggest adding a guideline or suggestion
                  about using signal channel to control filtering rules.<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">The
                  purpose of using DOTS signal channel to control
                  filtering rules is trying to help mitigate the DDoS
                  attack when under attack time. This purpose should
                  also be the guideline.
                  <o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Requests
                  which can help mitigate the attack should be send by
                  the signal channel immediately. Requests which can’t
                  help mitigate the attack should wait for the data
                  channel to be re-established and then be sent by the
                  data channel.<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">For
                  example, during attack time, de-activating a drop-list
                  (or blacklist) or activating a accept-list (or
                  whitelist) may usually not help mitigate the DDoS
                  attack. So If there is no necessary reason, these two
                  requests should wait for using the data channel.<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">[Med] Agree. We do have the following in
                  -01:<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR">  
                  A DOTS client relies on the information received from
                  the DOTS server<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR">  
                  and/or local information to the DOTS client domain to
                  trigger a<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR">  
                  filter control request.  Obviously, only filters that
                  are pertinent<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR">  
                  for an ongoing mitigation should be controlled by a
                  DOTS client using<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR">  
                </span><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR"
                  lang="FR">the DOTS signal channel.<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;">And<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR">  
                  The DOTS client can also decide to send a PUT request
                  to deactivate<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR">  
                  the "an-accept-list" ACL, if suspect traffic is
                  received from an<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR">  
                  accept-listed source (2001:db8:1234::/48).  The
                  structure of that PUT<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;;color:windowtext;mso-fareast-language:FR">  
                  is the same as the one shown in Figure 4.<o:p></o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
                  style="font-size:10.0pt;font-family:&quot;Courier
                  New&quot;"><o:p> </o:p></span></p>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
              <div>
                <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd;text-align:justify"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Best
                    Regards<o:p></o:p></span></p>
                <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd;text-align:justify"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext">Wei
                    Pan<o:p></o:p></span></p>
              </div>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:21.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:1.75gd"><span
style="font-family:&quot;Calibri&quot;,sans-serif;color:windowtext"><o:p> </o:p></span></p>
              <div>
                <div style="border:none;border-top:solid #E1E1E1
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><b><span
style="font-size:11.0pt;font-family:&quot;Microsoft
                        YaHei&quot;,sans-serif;color:windowtext"
                        lang="ZH-CN">发件人</span></b><b><span
                        style="font-size:11.0pt;font-family:&quot;Microsoft
                        YaHei&quot;,sans-serif;color:windowtext">:</span></b><span
style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext"> Dots [<a
                        href="mailto:dots-bounces@ietf.org"
                        moz-do-not-send="true">mailto:dots-bounces@ietf.org</a>]
                    </span>
                    <b><span
                        style="font-size:11.0pt;font-family:&quot;Microsoft
                        YaHei&quot;,sans-serif;color:windowtext"
                        lang="ZH-CN">代表
                      </span></b><span
                      style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext">kaname
                      nishizuka<br>
                    </span><b><span
                        style="font-size:11.0pt;font-family:&quot;Microsoft
                        YaHei&quot;,sans-serif;color:windowtext"
                        lang="ZH-CN">发送时间</span></b><b><span
                        style="font-size:11.0pt;font-family:&quot;Microsoft
                        YaHei&quot;,sans-serif;color:windowtext">:</span></b><span
style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext"> 2018</span><span
style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext"
                      lang="ZH-CN">年</span><span
                      style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext">11</span><span
style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext"
                      lang="ZH-CN">月</span><span
                      style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext">21</span><span
style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext"
                      lang="ZH-CN">日</span><span
                      style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext"> 9:50<br>
                    </span><b><span
                        style="font-size:11.0pt;font-family:&quot;Microsoft
                        YaHei&quot;,sans-serif;color:windowtext"
                        lang="ZH-CN">收件人</span></b><b><span
                        style="font-size:11.0pt;font-family:&quot;Microsoft
                        YaHei&quot;,sans-serif;color:windowtext">:</span></b><span
style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext">
                      <a href="mailto:dots@ietf.org"
                        moz-do-not-send="true">dots@ietf.org</a><br>
                    </span><b><span
                        style="font-size:11.0pt;font-family:&quot;Microsoft
                        YaHei&quot;,sans-serif;color:windowtext"
                        lang="ZH-CN">主题</span></b><b><span
                        style="font-size:11.0pt;font-family:&quot;Microsoft
                        YaHei&quot;,sans-serif;color:windowtext">:</span></b><span
style="font-size:11.0pt;font-family:&quot;Microsoft
                      YaHei&quot;,sans-serif;color:windowtext"> [Dots]
                      Fwd: I-D Action:
                      draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></span></p>
                </div>
              </div>
              <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><o:p> </o:p></p>
              <div>
                <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd">Hi,<br>
                  <br>
                  Base on the discussion of Bangkok interop: control
                  data channel filtering via signal channel,<br>
                  we've submitted the new draft for an extension to the
                  DOTS signal channel to control the filtering rules
                  during attack mitigation.<br>
                  <br>
                  thanks,<br>
                  Kaname Nishizuka<br>
                  <br>
                  <br>
                  <br>
                  -------- Forwarded Message -------- <o:p></o:p></p>
                <table class="MsoNormalTable" style="margin-left:42.0pt"
                  cellspacing="0" cellpadding="0" border="0">
                  <tbody>
                    <tr>
                      <td style="padding:0in 0in 0in 0in" valign="top"
                        nowrap="nowrap">
                        <p class="MsoNormal" style="text-align:right"
                          align="right"><b>Subject: <o:p></o:p></b></p>
                      </td>
                      <td style="padding:0in 0in 0in 0in">
                        <p class="MsoNormal">I-D Action:
                          draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></p>
                      </td>
                    </tr>
                    <tr>
                      <td style="padding:0in 0in 0in 0in" valign="top"
                        nowrap="nowrap">
                        <p class="MsoNormal" style="text-align:right"
                          align="right"><b>Date: <o:p></o:p></b></p>
                      </td>
                      <td style="padding:0in 0in 0in 0in">
                        <p class="MsoNormal">Tue, 20 Nov 2018 17:42:13
                          -0800<o:p></o:p></p>
                      </td>
                    </tr>
                    <tr>
                      <td style="padding:0in 0in 0in 0in" valign="top"
                        nowrap="nowrap">
                        <p class="MsoNormal" style="text-align:right"
                          align="right"><b>From: <o:p></o:p></b></p>
                      </td>
                      <td style="padding:0in 0in 0in 0in">
                        <p class="MsoNormal"><a
                            href="mailto:internet-drafts@ietf.org"
                            moz-do-not-send="true">internet-drafts@ietf.org</a><o:p></o:p></p>
                      </td>
                    </tr>
                    <tr>
                      <td style="padding:0in 0in 0in 0in" valign="top"
                        nowrap="nowrap">
                        <p class="MsoNormal" style="text-align:right"
                          align="right"><b>Reply-To: <o:p></o:p></b></p>
                      </td>
                      <td style="padding:0in 0in 0in 0in">
                        <p class="MsoNormal"><a
                            href="mailto:internet-drafts@ietf.org"
                            moz-do-not-send="true">internet-drafts@ietf.org</a><o:p></o:p></p>
                      </td>
                    </tr>
                    <tr>
                      <td style="padding:0in 0in 0in 0in" valign="top"
                        nowrap="nowrap">
                        <p class="MsoNormal" style="text-align:right"
                          align="right"><b>To: <o:p></o:p></b></p>
                      </td>
                      <td style="padding:0in 0in 0in 0in">
                        <p class="MsoNormal"><a
                            href="mailto:i-d-announce@ietf.org"
                            moz-do-not-send="true">i-d-announce@ietf.org</a><o:p></o:p></p>
                      </td>
                    </tr>
                  </tbody>
                </table>
                <p class="MsoNormal"
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><o:p> </o:p></p>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">A New Internet-Draft is available from the on-line Internet-Drafts directories.<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">        Title           : Controlling Filtering Rules Using DOTS Signal Channel<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">        Authors         : Kaname Nishizuka<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">                          Takahiko Nagata<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">                          Tirumaleswar Reddy<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">                          Mohamed Boucadair<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">    Filename        : draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">    Pages           : 11<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">    Date            : 2018-11-20<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">Abstract:<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   This document specifies an extension to the DOTS signal channel to<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   control the filtering rules during attack mitigation.<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   This extension allows a DOTS client to activate or de-activate<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   filtering rules during a DDoS attack.  The characterization of these<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   filters is supposed to be conveyed by a DOTS client during peace time<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   by means of DOTS data channel.<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">Editorial Note (To be removed by RFC Editor)<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   Please update these statements within the document with the RFC<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   number to be assigned to this document:<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   o  "This version of this YANG module is part of RFC XXXX;"<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   o  "RFC XXXX: Controlling Filtering Rules Using DOTS Signal Channel";<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   o  reference: RFC XXXX<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   o  [RFCXXXX]<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   Please update these statements with the RFC number to be assigned to<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   the following documents:<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">      (DOTS) Signal Channel Specification" (used to be<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">      [I-D.ietf-dots-signal-channel])<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">      (DOTS) Data Channel Specification" (used to be<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">      [I-D.ietf-dots-data-channel])<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">   Please update the "revision" date of the YANG module.<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">The IETF datatracker status page for this draft is:<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><a href="https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-filtering/" moz-do-not-send="true">https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-filtering/</a><o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">There are also htmlized versions available at:<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><a href="https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filtering-00" moz-do-not-send="true">https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filtering-00</a><o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><a href="https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-control-filtering-00" moz-do-not-send="true">https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-control-filtering-00</a><o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">Please note that it may take a couple of minutes from the time of submission<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">until the htmlized version and diff are available at tools.ietf.org.<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">Internet-Drafts are also available by anonymous FTP at:<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><a href="ftp://ftp.ietf.org/internet-drafts/" moz-do-not-send="true">ftp://ftp.ietf.org/internet-drafts/</a><o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><o:p> </o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">_______________________________________________<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">I-D-Announce mailing list<o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><a href="mailto:I-D-Announce@ietf.org" moz-do-not-send="true">I-D-Announce@ietf.org</a><o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;"><a href="https://www.ietf.org/mailman/listinfo/i-d-announce" moz-do-not-send="true">https://www.ietf..org/mailman/listinfo/i-d-announce</a><o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">Internet-Draft directories: <a href="http://www.ietf.org/shadow.html" moz-do-not-send="true">http://www.ietf.org/shadow.html</a><o:p></o:p></span></pre>
                <pre style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:.05in;margin-left:42.0pt;mso-margin-top-alt:0in;mso-para-margin-right:0in;mso-para-margin-bottom:.05in;mso-para-margin-left:3.5gd"><span style="font-size:10.0pt;font-family:&quot;Courier New&quot;">or <a href="ftp://ftp.ietf.org/ietf/1shadow-sites.txt" moz-do-not-send="true">ftp://ftp.ietf.org/ietf/1shadow-sites.txt</a><o:p></o:p></span></pre>
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Subject: Re: [Dots] Opsdir last call review of draft-ietf-dots-requirements-16
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: "'kaname nishizuka'" <kaname@nttv6.jp>, <dots@ietf.org>, "'Konda, Tirumaleswar Reddy'" <TirumaleswarReddy_Konda@mcafee.com>, <mohamed.boucadair@orange.com>, "Panwei \(William\)" <william.panwei@huawei.com>
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Hi Kaname,

=20

Unfortunately, implementing the (effectively white-list and black-list =
lists) DOTS ACLs in an upstream router to the DDoS Mitigator will kill =
off all traffic that does not match the ACLs =E2=80=93 unless there is a =
final hidden, implicit ACL that accepts all the remaining traffic.

=20

My tri-state issue perhaps comes more from the I-D DOTS Data Channel =
than this draft, but does still apply to this draft as it is defining =
what can be controlled by the Signal channel.

=20

Perhaps my concerns can be addressed instead by replacing in the I-D =
DOTS Data Channel (in 4.1)

=20

=E2=80=9CIf there is no match, then there is no action to be taken =
against the packet.=E2=80=9D

=20

With

=20

=E2=80=9CIf there is no match, then the packet will still be mitigated =
by the DOTS mitigator (how is out of scope) if a mitigation is =
active.=E2=80=9D

=20

Regards

=20

Jon

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of kaname nishizuka
Sent: 26 November 2018 08:33
To: Konda, Tirumaleswar Reddy; Jon Shallow; 'Panwei (William)'; =
dots@ietf.org; mohamed.boucadair@orange.com
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Jon,

Yes, I agree with Tiru.
I can hit upon an example that ACLs are implemented on a router in front =
of a mitigator.
In this case, keeping the model of ACLs to be same as the =
draft-ietf-netmod-acl-model will make deployment easier.

regards,
Kaname



On 2018/11/26 15:06, Konda, Tirumaleswar Reddy wrote:

Hi Jon,

=20

If the DOTS client believes the traffic from the accept-list sources =
will not attack its targets, it configures the accept-list filtering =
rules. The draft-nishizuka-dots-signal-control-filtering is  dealing =
with an attack scenario where the accept-list sources are either spoofed =
or compromised to attack the target.=20

=20

Irrespective of whether accept-list rules are configured or not, all =
incoming traffic will be scrubbed and the DOTS client will be notified =
if the accept-list sources are attacking target. It is then up to the =
DOTS client to make a call and de-activate the accept-list rules.=20

The DOTS client with DDoS detection capability can also identify and =
de-activate the accept-list rules during attack even without the =
conflict notification from the DOTS server.=20

=20

Since all traffic to the target will anyway be scrubbed during DDoS =
mitigation, I don=E2=80=99t see the need to configure a =
=E2=80=9Caccept+mitigate=E2=80=9D.  The =E2=80=9Cno action=E2=80=9D does =
not mean the traffic (not matching the filtering rules) will by-pass =
scrubbing by the DDoS mitigator.

=20

Cheers,

-Tiru

=20

From: Jon Shallow  <mailto:supjps-ietf@jpshallow.com> =
<supjps-ietf@jpshallow.com>=20
Sent: Friday, November 23, 2018 4:42 PM
To: 'Panwei (William)'  <mailto:william.panwei@huawei.com> =
<william.panwei@huawei.com>; dots@ietf.org; =
mohamed.boucadair@orange.com; Konda, Tirumaleswar Reddy  =
<mailto:TirumaleswarReddy_Konda@McAfee.com> =
<TirumaleswarReddy_Konda@McAfee.com>; 'kaname nishizuka'  =
<mailto:kaname@nttv6.jp> <kaname@nttv6.jp>
Subject: RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20


CAUTION: External email. Do not click links or open attachments unless =
you recognize the sender and know the content is safe.


  _____ =20


Hi There,

=20

This thread has flagged up to me that we are trying to represent a =
tri-state of actions (=E2=80=9Calways-drop=E2=80=9D, =
=E2=80=9Calways-let-through=E2=80=9D and =
=E2=80=9Clet-through-if-after-being-mitigated-it-is-allowed=E2=80=9D) =
with a duo-state of =E2=80=9Caccept-list=E2=80=9D and =
=E2=80=9Cdrop-list=E2=80=9D in the (Data Channel) ACLs.

=20

The traditional ACL is a set of match criteria and then an appropriate =
action if matched. =20

[As a separate note, picked up later, it has always been unclear in my =
mind over many years as to what happens if a packet does not trigger a =
match in any of the ACLs (falls off the end of the list).  What happens =
is usually defined by documentation of what actually happens in the =
underlying logic.  The Data Channel currently states =E2=80=9CIf there =
is no match, then there is no action to be taken against the =
packet.=E2=80=9D.]

The Data Channel only defines the DOTS forwarding actions as =
=E2=80=98accept=E2=80=99 or =E2=80=98drop=E2=80=99 with the addition of =
=E2=80=98rate-limit=E2=80=99 if =E2=80=98accept=E2=80=99 is defined.

It does state that, as an example, =E2=80=9CAccept-list management, =
which enables a DOTS client to inform a DOTS server about sources from =
which traffic should always be accepted=E2=80=9D which implies that =
=E2=80=98accept=E2=80=99 is the same as what we knew as white-list.  =
However, =E2=80=98accept=E2=80=99 means just that =E2=80=93 it is =
accepted at this point in the process.  Yes, it is effectively defined =
as a white list in the requirements document, but even though those =
working with the DOTS documents can get confused as they also are =
thinking about mitigate or mitigation [Is it accepted for mitigation, or =
is it unconditionally accepted?].

=20

We need the DOTS server to clearly understand the tri-state, and  cause =
(how is out of scope) traffic to be always accepted, always dropped or =
be analysed to see if it needs to be mitigated.

=20

In terms of moving forward, we could (in Data Channel) have an =
additional =E2=80=98leaf mitigate=E2=80=99 in =E2=80=98container =
actions=E2=80=99 which is only available when =E2=80=98accept=E2=80=99.  =
If true, traffic is passed to a mitigator (how out of scope), if false =
traffic is always passed through. (=E2=80=98leaf rate-limit=E2=80=99 is =
a special case of mitigation I guess.)

Alternatively, we could have actions of =E2=80=98accept=E2=80=99, =
=E2=80=98drop=E2=80=99 or =E2=80=98mitigate=E2=80=99.  =
=E2=80=98accept=E2=80=99 would then have the traditional meaning of pass =
=E2=80=93 effectively a white-list as previously intended, and =
=E2=80=98mitigate=E2=80=99 much clearer to the reader as to the intent.  =
Then we just need a definition for =E2=80=9CMitigate-List:=E2=80=9D.  I =
think =E2=80=98rate-limit=E2=80=99 would then have to only be associated =
with =E2=80=98mitigate=E2=80=99, not =E2=80=98accept=E2=80=99 as =
=E2=80=98accept=E2=80=99 is whitelist(no expected additional action).

=20

Using =E2=80=98accept=E2=80=99, =E2=80=98drop=E2=80=99 or =
=E2=80=98mitigate=E2=80=99 (or =E2=80=98accept + mitigate=E2=80=99, =
=E2=80=98accept + no-mitigate=E2=80=99 or =E2=80=98drop=E2=80=99 if =
going with the additional leaf suggestion) makes it much easier to =
directly instantiate these actions in the DOTS server environment.

=20

That then just leaves the question of what happens if there are no ACL =
matches (there could be no ACLs defined).  Do we go for an implied last =
ACL of all other traffic is to be mitigated if mitigating (Signal =
channel request), or do we take =E2=80=98no action=E2=80=99 as defined =
in the Data Channel?

=20

Regards

=20

Jon

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of Panwei (William)
Sent: 23 November 2018 08:25
To: Konda, Tirumaleswar Reddy; mohamed.boucadair@orange.com
Cc: dots@ietf.org; kaname nishizuka
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Tiru, Med,

=20

Thank you for explaining and reminding me. I just remembered that this =
terminology has already been described in the requirement draft.

Accept-list: A list of filters indicating sources from which traffic

should always be allowed, regardless of contradictory data gleaned

in a detected attack.

=20

Best Regards

Wei Pan

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: Konda, Tirumaleswar Reddy =
[mailto:TirumaleswarReddy_Konda@McAfee.com]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2018=E5=B9=B411=E6=9C=8823=E6=97=A5 16:07
=E6=94=B6=E4=BB=B6=E4=BA=BA: mohamed.boucadair@orange.com; Panwei =
(William) <william.panwei@huawei.com>; kaname nishizuka =
<kaname@nttv6.jp>
=E6=8A=84=E9=80=81: dots@ietf.org
=E4=B8=BB=E9=A2=98: RE: Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

If accept-listed sources are attacking the target, the DOTS server =
cannot turn-off the accept-list filtering rules without the consent from =
the DOTS client. DOTS server can inform the DOTS client of the conflict =
and/or the DOTS client with DDoS detection capability can identify the =
attack, and using the signal channel de-activate the accept-list =
filtering rules.

=20

=E2=80=9Caccept-list=E2=80=9D does not mean only the traffic matching =
the accept-list will be allowed to reach the target.=20

=20

Cheers,

-Tiru

=20

From: Dots <dots-bounces@ietf.org> On Behalf Of =
mohamed.boucadair@orange.com
Sent: Friday, November 23, 2018 12:04 PM
To: Panwei (William) <william.panwei@huawei.com>; kaname nishizuka =
<kaname@nttv6.jp>
Cc: dots@ietf.org
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20


CAUTION: External email. Do not click links or open attachments unless =
you recognize the sender and know the content is safe.


  _____ =20


Hi Wei,=20

=20

Please see inline.

=20

Cheers,

Med

=20

De : Dots [mailto:dots-bounces@ietf.org] De la part de Panwei (William)
Envoy=C3=A9 : vendredi 23 novembre 2018 04:09
=C3=80 : kaname nishizuka
Cc : dots@ietf.org
Objet : [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Kaname,

=20

I have read your draft recently, and I have two suggestions about it.

1.      I=E2=80=99d like to suggest using =E2=80=9Cwhitelist=E2=80=9D or =
=E2=80=9CDDoS detection whitelist=E2=80=9D instead of =
=E2=80=9Caccept-list=E2=80=9D in the typical case.

=20

[Med] accept-list means white-list. accept-list is already used in DOTS =
requirements and data channel. The signal channel will make use of that =
term too. FWIW, that change is made because of what was reported by =
hrpc.=20

=20

A typical case is a DOTS client which configures during peace time

filtering rules using data channel to permit traffic from accept-

listed sources, but during the volumetric DDoS attack the DDoS

mitigator identifies the source addresses/prefixes in the accept-

listed filtering rules are attacking the target. For example, an

attacker can spoof the IP addresses of accept-listed sources to

generate attack traffic or the attacker can compromise the accept-

listed sources and program them to launch DDoS attack.

In this typical case, when you use =E2=80=9Caccept-list=E2=80=9D, it =
sounds like that only the traffic which match the accept-list can reach =
the target. I don=E2=80=99t know if you mean so, but if YES, I feel like =
the extension may not be essentially needed in such case. Because if a =
DDoS attack occurs in such situation, the attacker must have been =
included in the accept-list. The DOTS server can get this conclusion as =
the DOTS client can, so the DOTS server can de-activate the accept-list =
by its own without DOTS client=E2=80=99s request of filtering rules.=20

In my opinion, =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS detection =
whitelist=E2=80=9D is more suitable than  =E2=80=9Caccept-list=E2=80=9D. =
Because it indicates that the traffic which doesn=E2=80=99t match the =
DDoS whitelist can also reach the target, as long as it passes the =
detection. And if a DDoS attack happens, the DOTS server can=E2=80=99t =
know if the attacker is in the whitelist. If DOTS client find that the =
attacker is included in the DDoS whitelist, it must request the DOTS =
server to de-activate the whitelist.

=20

I=E2=80=99m not object to your case, I just want to make it clear and no =
misunderstanding.

=20

2. I=E2=80=99d like to suggest adding a guideline or suggestion about =
using signal channel to control filtering rules.

The purpose of using DOTS signal channel to control filtering rules is =
trying to help mitigate the DDoS attack when under attack time. This =
purpose should also be the guideline.=20

Requests which can help mitigate the attack should be send by the signal =
channel immediately. Requests which can=E2=80=99t help mitigate the =
attack should wait for the data channel to be re-established and then be =
sent by the data channel.

For example, during attack time, de-activating a drop-list (or =
blacklist) or activating a accept-list (or whitelist) may usually not =
help mitigate the DDoS attack. So If there is no necessary reason, these =
two requests should wait for using the data channel.

=20

[Med] Agree. We do have the following in -01:

=20

   A DOTS client relies on the information received from the DOTS server

   and/or local information to the DOTS client domain to trigger a

   filter control request.  Obviously, only filters that are pertinent

   for an ongoing mitigation should be controlled by a DOTS client using

   the DOTS signal channel.

=20

And

=20

   The DOTS client can also decide to send a PUT request to deactivate

   the "an-accept-list" ACL, if suspect traffic is received from an

   accept-listed source (2001:db8:1234::/48).  The structure of that PUT

   is the same as the one shown in Figure 4.

=20

=20

Best Regards

Wei Pan

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: Dots [mailto:dots-bounces@ietf.org] =
=E4=BB=A3=E8=A1=A8 kaname nishizuka
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2018=E5=B9=B411=E6=9C=8821=E6=97=A5 9:50
=E6=94=B6=E4=BB=B6=E4=BA=BA: dots@ietf.org
=E4=B8=BB=E9=A2=98: [Dots] Fwd: I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt

=20

Hi,

Base on the discussion of Bangkok interop: control data channel =
filtering via signal channel,
we've submitted the new draft for an extension to the DOTS signal =
channel to control the filtering rules during attack mitigation.

thanks,
Kaname Nishizuka



-------- Forwarded Message --------=20


Subject:=20

I-D Action: draft-nishizuka-dots-signal-control-filtering-00.txt


Date:=20

Tue, 20 Nov 2018 17:42:13 -0800


From:=20

internet-drafts@ietf.org


Reply-To:=20

internet-drafts@ietf.org


To:=20

i-d-announce@ietf.org

=20

A New Internet-Draft is available from the on-line Internet-Drafts =
directories.
=20
=20
        Title           : Controlling Filtering Rules Using DOTS Signal =
Channel
        Authors         : Kaname Nishizuka
                          Takahiko Nagata
                          Tirumaleswar Reddy
                          Mohamed Boucadair
    Filename        : =
draft-nishizuka-dots-signal-control-filtering-00.txt
    Pages           : 11
    Date            : 2018-11-20
=20
Abstract:
   This document specifies an extension to the DOTS signal channel to
   control the filtering rules during attack mitigation.
=20
   This extension allows a DOTS client to activate or de-activate
   filtering rules during a DDoS attack.  The characterization of these
   filters is supposed to be conveyed by a DOTS client during peace time
   by means of DOTS data channel.
=20
Editorial Note (To be removed by RFC Editor)
=20
   Please update these statements within the document with the RFC
   number to be assigned to this document:
=20
   o  "This version of this YANG module is part of RFC XXXX;"
=20
   o  "RFC XXXX: Controlling Filtering Rules Using DOTS Signal Channel";
=20
   o  reference: RFC XXXX
=20
   o  [RFCXXXX]
=20
   Please update these statements with the RFC number to be assigned to
   the following documents:
=20
   o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Signal Channel Specification" (used to be
      [I-D.ietf-dots-signal-channel])
=20
   o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Data Channel Specification" (used to be
      [I-D.ietf-dots-data-channel])
=20
   Please update the "revision" date of the YANG module.
=20
=20
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-filt=
ering/
=20
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filtering=
-00
https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-control=
-filtering-00
=20
=20
Please note that it may take a couple of minutes from the time of =
submission
until the htmlized version and diff are available at tools.ietf.org.
=20
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
=20
_______________________________________________
I-D-Announce mailing list
I-D-Announce@ietf.org
https://www.ietf..org/mailman/listinfo/i-d-announce =
<https://www.ietf.org/mailman/listinfo/i-d-announce>=20
Internet-Draft directories: http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

=20


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</o:shapelayout></xml><![endif]--></head><body bgcolor=3Dwhite =
lang=3DEN-GB link=3Dblue vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Kaname,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Unfortunately, implementing the (effectively white-list and =
black-list lists) DOTS ACLs in an upstream router to the DDoS Mitigator =
will kill off all traffic that does not match the ACLs =E2=80=93 unless =
there is a final hidden, implicit ACL that accepts all the remaining =
traffic.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>My tri-state issue perhaps comes more from the I-D DOTS Data Channel =
than this draft, but does still apply to this draft as it is defining =
what can be controlled by the Signal channel.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Perhaps my concerns can be addressed instead by replacing in the I-D =
DOTS Data Channel (in 4.1)<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9CIf there is no match, then there is no action to be taken =
against the packet.=E2=80=9D<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>With<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9CIf there is no match, then the packet will still be =
mitigated by the DOTS mitigator (how is out of scope) if a mitigation is =
active.=E2=80=9D<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon</span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: dots-bounces@ietf.org] <b>On Behalf Of </b>kaname =
nishizuka<br><b>Sent:</b> 26 November 2018 08:33<br><b>To:</b> Konda, =
Tirumaleswar Reddy; Jon Shallow; 'Panwei (William)'; dots@ietf.org; =
mohamed.boucadair@orange.com<br><b>Subject:</b> Re: [Dots] Suggestions =
about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>Hi Jon,<br><br>Yes, I agree with =
Tiru.<br>I can hit upon an example that ACLs are implemented on a router =
in front of a mitigator.<br>In this case, keeping the model of ACLs to =
be same as the draft-ietf-netmod-acl-model will make deployment =
easier.<br><br>regards,<br>Kaname<br><br><o:p></o:p></p><div><p =
class=3DMsoNormal>On 2018/11/26 15:06, Konda, Tirumaleswar Reddy =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Hi Jon,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>If the DOTS client believes the traffic from the accept-list =
sources will not attack its targets, it configures the accept-list =
filtering rules. The draft-nishizuka-dots-signal-control-filtering is =
&nbsp;dealing with an attack scenario where the accept-list sources are =
either spoofed or compromised to attack the target. =
</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Irrespective of whether accept-list rules are configured or not, =
all incoming traffic will be scrubbed and the DOTS client will be =
notified if the accept-list sources are attacking target. It is then up =
to the DOTS client to make a call and de-activate the accept-list rules. =
</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>The DOTS client with DDoS detection capability can also identify =
and de-activate the accept-list rules during attack even without the =
conflict notification from the DOTS server. </span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Since all traffic to the target will anyway be scrubbed during =
DDoS mitigation, I don=E2=80=99t see the need to configure a =
=E2=80=9Caccept+mitigate=E2=80=9D. &nbsp;The =E2=80=9Cno action=E2=80=9D =
does not mean the traffic (not matching the filtering rules) will =
by-pass scrubbing by the DDoS mitigator.</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>-Tiru</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>From:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'> Jon Shallow <a =
href=3D"mailto:supjps-ietf@jpshallow.com">&lt;supjps-ietf@jpshallow.com&g=
t;</a> <br><b>Sent:</b> Friday, November 23, 2018 4:42 PM<br><b>To:</b> =
'Panwei (William)' <a =
href=3D"mailto:william.panwei@huawei.com">&lt;william.panwei@huawei.com&g=
t;</a>; <a href=3D"mailto:dots@ietf.org">dots@ietf.org</a>; <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a>; Konda, Tirumaleswar Reddy <a =
href=3D"mailto:TirumaleswarReddy_Konda@McAfee.com">&lt;TirumaleswarReddy_=
Konda@McAfee.com&gt;</a>; 'kaname nishizuka' <a =
href=3D"mailto:kaname@nttv6.jp">&lt;kaname@nttv6.jp&gt;</a><br><b>Subject=
:</b> RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><div><table =
class=3DMsoNormalTable border=3D1 cellspacing=3D3 cellpadding=3D0 =
style=3D'background:#F3FF33;border:solid #9B9A87 1.5pt'><tr><td =
style=3D'border:none;padding:.75pt .75pt .75pt .75pt'><p><strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>CAUTION</span></=
strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>:</span><span =
style=3D'font-family:"Arial","sans-serif"'> External email. Do not click =
links or open attachments unless you recognize the sender and know the =
content is safe.</span><o:p></o:p></p></td></tr></table><div =
class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><hr size=3D2 width=3D"100%" align=3Dcenter></span></div></div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi There,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>This thread has flagged up to me that we are trying to represent a =
tri-state of actions (=E2=80=9Calways-drop=E2=80=9D, =
=E2=80=9Calways-let-through=E2=80=9D and =
=E2=80=9Clet-through-if-after-being-mitigated-it-is-allowed=E2=80=9D) =
with a duo-state of =E2=80=9Caccept-list=E2=80=9D and =
=E2=80=9Cdrop-list=E2=80=9D in the (Data Channel) =
ACLs.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The traditional ACL is a set of match criteria and then an =
appropriate action if matched.&nbsp; </span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>[As a separate note, picked up later, it has always been unclear in =
my mind over many years as to what happens if a packet does not trigger =
a match in any of the ACLs (falls off the end of the list). &nbsp;What =
happens is usually defined by documentation of what actually happens in =
the underlying logic.&nbsp; The Data Channel currently states =
=E2=80=9CIf there is <b>no match</b>, then there is <b>no action</b> to =
be taken against the packet.=E2=80=9D.]</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The Data Channel only defines the DOTS forwarding actions as =
=E2=80=98accept=E2=80=99 or =E2=80=98drop=E2=80=99 with the addition of =
=E2=80=98rate-limit=E2=80=99 if =E2=80=98accept=E2=80=99 is =
defined.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>It does state that, as an example, =E2=80=9CAccept-list management, =
which enables a DOTS client to inform a DOTS server about sources from =
which traffic should always be accepted=E2=80=9D which implies that =
=E2=80=98accept=E2=80=99 is the same as what we knew as =
white-list.&nbsp; However, =E2=80=98accept=E2=80=99 means just that =
=E2=80=93 it is accepted at this point in the process.&nbsp; Yes, it is =
effectively defined as a white list in the requirements document, but =
even though those working with the DOTS documents can get confused as =
they also are thinking about mitigate or mitigation [Is it accepted for =
mitigation, or is it unconditionally accepted?].</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>We need the DOTS server to clearly understand the tri-state, and =
&nbsp;cause (how is out of scope) traffic to be always accepted, always =
dropped or be analysed to see if it needs to be =
mitigated.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>In terms of moving forward, we could (in Data Channel) have an =
additional =E2=80=98leaf mitigate=E2=80=99 in =E2=80=98container =
actions=E2=80=99 which is only available when =
=E2=80=98accept=E2=80=99.&nbsp; If true, traffic is passed to a =
mitigator (how out of scope), if false traffic is always passed through. =
(=E2=80=98leaf rate-limit=E2=80=99 is a special case of mitigation I =
guess.)</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Alternatively, we could have actions of =E2=80=98accept=E2=80=99, =
=E2=80=98drop=E2=80=99 or =E2=80=98mitigate=E2=80=99.&nbsp; =
=E2=80=98accept=E2=80=99 would then have the traditional meaning of pass =
=E2=80=93 effectively a white-list as previously intended, and =
=E2=80=98mitigate=E2=80=99 much clearer to the reader as to the =
intent.&nbsp; Then we just need a definition for =
=E2=80=9CMitigate-List:=E2=80=9D.&nbsp; I think =
=E2=80=98rate-limit=E2=80=99 would then have to only be associated with =
=E2=80=98mitigate=E2=80=99, not =E2=80=98accept=E2=80=99 as =
=E2=80=98accept=E2=80=99 is whitelist(no expected additional =
action).</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Using =E2=80=98accept=E2=80=99, =E2=80=98drop=E2=80=99 or =
=E2=80=98mitigate=E2=80=99 (or =E2=80=98accept + mitigate=E2=80=99, =
=E2=80=98accept + no-mitigate=E2=80=99 or =E2=80=98drop=E2=80=99 if =
going with the additional leaf suggestion) makes it much easier to =
directly instantiate these actions in the DOTS server =
environment.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>That then just leaves the question of what happens if there are no =
ACL matches (there could be no ACLs defined).&nbsp; Do we go for an =
implied last ACL of all other traffic is to be mitigated if mitigating =
(Signal channel request), or do we take =E2=80=98no action=E2=80=99 as =
defined in the Data Channel?</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: <a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>] <b>On =
Behalf Of </b>Panwei (William)<br><b>Sent:</b> 23 November 2018 =
08:25<br><b>To:</b> Konda, Tirumaleswar Reddy; <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Cc:</b> <a href=3D"mailto:dots@ietf.org">dots@ietf.org</a>; =
kaname nishizuka<br><b>Subject:</b> Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Hi Tiru, =
Med,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Thank you =
for explaining and reminding me. I just remembered that this terminology =
has already been described in the requirement =
draft.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd;text-autospace:none'><span=
 =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>Accept-li=
st: A list of filters indicating sources from which =
traffic</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd;text-autospace:none'><span=
 style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>should =
always be allowed, regardless of contradictory data =
gleaned</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd'><span =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>in a =
detected attack.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'text-align:justify'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Best =
Regards</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'text-align:justify'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Wei =
Pan</span><o:p></o:p></p></div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E4=BB=B6=E4=BA=BA</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
Konda, Tirumaleswar Reddy [<a =
href=3D"mailto:TirumaleswarReddy_Konda@McAfee.com">mailto:TirumaleswarRed=
dy_Konda@McAfee.com</a>] <br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
2018</span><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E5=B9=B4</span><span =
style=3D'font-size:11.0pt'>11</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=9C=88</span><span =
style=3D'font-size:11.0pt'>23</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=97=A5</span><span =
style=3D'font-size:11.0pt'> 16:07<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=94=B6=E4=BB=B6=E4=BA=BA</span></b=
><b><span style=3D'font-size:11.0pt'>:</span></b><span =
style=3D'font-size:11.0pt'> <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a>; Panwei (William) &lt;<a =
href=3D"mailto:william.panwei@huawei.com">william.panwei@huawei.com</a>&g=
t;; kaname nishizuka &lt;<a =
href=3D"mailto:kaname@nttv6.jp">kaname@nttv6.jp</a>&gt;<br></span><b><spa=
n lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=8A=84=E9=80=81</span></b><b><span=
 style=3D'font-size:11.0pt'>:</span></b><span =
style=3D'font-size:11.0pt'> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br></span><b><span =
lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E4=B8=BB</span></b><b><span =
lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E9=A2=98</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
RE: Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'>&nbsp;<o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>If accept-listed sources are attacking the target, the DOTS server =
cannot turn-off the accept-list filtering rules without the consent from =
the DOTS client. DOTS server can inform the DOTS client of the conflict =
and/or the DOTS client with DDoS detection capability can identify the =
attack, and using the signal channel de-activate the accept-list =
filtering rules.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>=E2=80=9Caccept-list=E2=80=9D does not mean only the traffic =
matching the accept-list will be allowed to reach the target. =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>-Tiru</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>From:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'> Dots &lt;<a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>&gt; =
<b>On Behalf Of </b><a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Sent:</b> Friday, November 23, 2018 12:04 PM<br><b>To:</b> =
Panwei (William) &lt;<a =
href=3D"mailto:william.panwei@huawei.com">william.panwei@huawei.com</a>&g=
t;; kaname nishizuka &lt;<a =
href=3D"mailto:kaname@nttv6.jp">kaname@nttv6.jp</a>&gt;<br><b>Cc:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Subject:</b> Re: =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'>&nbsp;<o:p></o:p></p><di=
v><table class=3DMsoNormalTable border=3D1 cellspacing=3D3 =
cellpadding=3D0 =
style=3D'margin-left:21.0pt;background:#F3FF33;border:solid #9B9A87 =
1.5pt'><tr><td style=3D'border:none;padding:.75pt .75pt .75pt =
.75pt'><p><strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>CAUTION</span></=
strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>:</span><span =
style=3D'font-family:"Arial","sans-serif"'> External email. Do not click =
links or open attachments unless you recognize the sender and know the =
content is safe.</span><o:p></o:p></p></td></tr></table><div =
style=3D'margin-bottom:3.6pt'><div =
style=3D'margin-left:21.0pt;margin-bottom:5.0pt'><div class=3DMsoNormal =
align=3Dcenter =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd;text-align:center=
'><span lang=3DFR =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><hr size=3D2 width=3D"100%" =
align=3Dcenter></span></div></div></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Hi Wei, =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Please see =
inline.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Med</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>De&nbsp;:</span></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
<b>De la part de</b> Panwei (William)<br><b>Envoy=C3=A9&nbsp;:</b> =
vendredi 23 novembre 2018 04:09<br><b>=C3=80&nbsp;:</b> kaname =
nishizuka<br><b>Cc&nbsp;:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Objet&nbsp;:</b> =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
lang=3DFR>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Hi =
Kaname,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>I have =
read your draft recently, and I have two suggestions about =
it.</span><o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:93.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:6.25gd;text-indent:-18.0pt'><spa=
n =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>1.</span><s=
pan =
style=3D'font-size:7.0pt;color:windowtext'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
 </span><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>I=E2=80=99d=
 like to suggest using =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS =
detection whitelist=E2=80=9D instead of =E2=80=9Caccept-list=E2=80=9D in =
the typical case.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif"'>&nbsp;</span><o:p></o:p></p>=
<p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>[Med] =
accept-list means white-list. accept-list is already used in DOTS =
requirements and data channel. The signal channel will make use of that =
term too. FWIW, that change is made because of what was reported by =
hrpc. </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>A =
typical case is a DOTS client which configures during peace =
time</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>filtering=
 rules using data channel to permit traffic from =
accept-</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>listed =
sources, but during the volumetric DDoS attack the =
DDoS</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>mitigator=
 identifies the source addresses/prefixes in the =
accept-</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>listed =
filtering rules are attacking the target. For example, =
an</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>attacker =
can spoof the IP addresses of accept-listed sources =
to</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>generate =
attack traffic or the attacker can compromise the =
accept-</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd'><span =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>listed =
sources and program them to launch DDoS attack.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>In this =
typical case, when you use =E2=80=9Caccept-list=E2=80=9D, it sounds like =
that only the traffic which match the accept-list can reach the target. =
I don=E2=80=99t know if you mean so, but if YES, I feel like the =
extension may not be essentially needed in such case. Because if a DDoS =
attack occurs in such situation, the attacker must have been included in =
the accept-list. The DOTS server can get this conclusion as the DOTS =
client can, so the DOTS server can de-activate the accept-list by its =
own without DOTS client=E2=80=99s request of filtering rules. =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>In my =
opinion, =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS detection =
whitelist=E2=80=9D is more suitable than =
&nbsp;=E2=80=9Caccept-list=E2=80=9D. Because it indicates that the =
traffic which doesn=E2=80=99t match the DDoS whitelist can also reach =
the target, as long as it passes the detection. And if a DDoS attack =
happens, the DOTS server can=E2=80=99t know if the attacker is in the =
whitelist. If DOTS client find that the attacker is included in the DDoS =
whitelist, it must request the DOTS server to de-activate the =
whitelist.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>I=E2=80=99m=
 not object to your case, I just want to make it clear and no =
misunderstanding.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>2. =
I=E2=80=99d like to suggest adding a guideline or suggestion about using =
signal channel to control filtering rules.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>The =
purpose of using DOTS signal channel to control filtering rules is =
trying to help mitigate the DDoS attack when under attack time. This =
purpose should also be the guideline. </span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Requests =
which can help mitigate the attack should be send by the signal channel =
immediately. Requests which can=E2=80=99t help mitigate the attack =
should wait for the data channel to be re-established and then be sent =
by the data channel.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>For =
example, during attack time, de-activating a drop-list (or blacklist) or =
activating a accept-list (or whitelist) may usually not help mitigate =
the DDoS attack. So If there is no necessary reason, these two requests =
should wait for using the data channel.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>[Med] =
Agree. We do have the following in -01:</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; A DOTS client relies on the =
information received from the DOTS server</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; and/or local information to the =
DOTS client domain to trigger a</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; filter control request.&nbsp; =
Obviously, only filters that are pertinent</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; for an ongoing mitigation should =
be controlled by a DOTS client using</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; </span><span lang=3DFR =
style=3D'font-size:10.0pt'>the DOTS signal =
channel.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>And</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; The DOTS client can also decide =
to send a PUT request to deactivate</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; the &quot;an-accept-list&quot; =
ACL, if suspect traffic is received from an</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; accept-listed source =
(2001:db8:1234::/48).&nbsp; The structure of that =
PUT</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; is the same as the one shown in =
Figure 4.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd;text-align:justify'><span=
 style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Best =
Regards</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd;text-align:justify'><span=
 style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Wei =
Pan</span><o:p></o:p></p></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E4=BB=B6=E4=BA=BA</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
Dots [<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
</span><b><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E4=BB=A3=E8=A1=A8</span></b><b><span=
 lang=3DZH-CN style=3D'font-size:11.0pt;mso-fareast-language:ZH-CN'> =
</span></b><span style=3D'font-size:11.0pt'>kaname =
nishizuka<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
2018</span><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E5=B9=B4</span><span =
style=3D'font-size:11.0pt'>11</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=9C=88</span><span =
style=3D'font-size:11.0pt'>21</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=97=A5</span><span =
style=3D'font-size:11.0pt'> 9:50<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=94=B6=E4=BB=B6=E4=BA=BA</span></b=
><b><span style=3D'font-size:11.0pt'>:</span></b><span =
style=3D'font-size:11.0pt'> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br></span><b><span =
lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E4=B8=BB</span></b><b><span =
lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E9=A2=98</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
[Dots] Fwd: I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt</span><o:p></o:p></p=
></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'>&nbsp;<o:p></o:p></p><div=
><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'>Hi,<br><br>Base on the =
discussion of Bangkok interop: control data channel filtering via signal =
channel,<br>we've submitted the new draft for an extension to the DOTS =
signal channel to control the filtering rules during attack =
mitigation.<br><br>thanks,<br>Kaname Nishizuka<br><br><br><br>-------- =
Forwarded Message -------- <o:p></o:p></p><table class=3DMsoNormalTable =
border=3D0 cellspacing=3D0 cellpadding=3D0 =
style=3D'margin-left:42.0pt'><tr><td nowrap valign=3Dtop =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>Subject: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal>I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></p></td><=
/tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm 0cm 0cm 0cm'><p =
class=3DMsoNormal align=3Dright style=3D'text-align:right'><b>Date: =
</b><o:p></o:p></p></td><td style=3D'padding:0cm 0cm 0cm 0cm'><p =
class=3DMsoNormal>Tue, 20 Nov 2018 17:42:13 =
-0800<o:p></o:p></p></td></tr><tr><td nowrap valign=3Dtop =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>From: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal><a =
href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></p></td></tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm =
0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>Reply-To: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal><a =
href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></p></td></tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm =
0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>To: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal><a =
href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a><o:p></o:p=
></p></td></tr></table><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'>&nbsp;<o:p></o:p></p><pre=
 =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>A New =
Internet-Draft is available from the on-line Internet-Drafts =
directories.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Title&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
Controlling Filtering Rules Using DOTS Signal =
Channel</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Authors&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : Kaname =
Nishizuka</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; Takahiko Nagata</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; Tirumaleswar Reddy</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; Mohamed Boucadair</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp; =
Filename&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
draft-nishizuka-dots-signal-control-filtering-00.txt</span><o:p></o:p></p=
re><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp; =
Pages&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
11</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp; =
Date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
2018-11-20</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Abstract:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; This document specifies an extension to the =
DOTS signal channel to</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; control the filtering rules during attack =
mitigation.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; This extension allows a DOTS client to =
activate or de-activate</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; filtering rules during a DDoS attack.&nbsp; =
The characterization of these</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; filters is supposed to be conveyed by a DOTS =
client during peace time</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; by means of DOTS data =
channel.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Editorial =
Note (To be removed by RFC Editor)</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; Please update these statements within the =
document with the RFC</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; number to be assigned to this =
document:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;This version of this YANG =
module is part of RFC XXXX;&quot;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;RFC XXXX: Controlling Filtering =
Rules Using DOTS Signal Channel&quot;;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; reference: RFC =
XXXX</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; [RFCXXXX]</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; Please update these statements with the RFC =
number to be assigned to</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; the following =
documents:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;RFC SSSS: Distributed =
Denial-of-Service Open Threat Signaling</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) Signal Channel =
Specification&quot; (used to be</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
[I-D.ietf-dots-signal-channel])</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;RFC DDDD: Distributed =
Denial-of-Service Open Threat Signaling</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) Data Channel =
Specification&quot; (used to be</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
[I-D.ietf-dots-data-channel])</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; Please update the &quot;revision&quot; date =
of the YANG module.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>The IETF =
datatracker status page for this draft is:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-cont=
rol-filtering/">https://datatracker.ietf.org/doc/draft-nishizuka-dots-sig=
nal-control-filtering/</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>There are =
also htmlized versions available at:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-f=
iltering-00">https://tools.ietf.org/html/draft-nishizuka-dots-signal-cont=
rol-filtering-00</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal=
-control-filtering-00">https://datatracker.ietf.org/doc/html/draft-nishiz=
uka-dots-signal-control-filtering-00</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Please note =
that it may take a couple of minutes from the time of =
submission</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>until the =
htmlized version and diff are available at =
tools.ietf.org.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Internet-Drafts are also available by anonymous FTP =
at:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"ftp://ftp.ietf.org/internet-drafts/">ftp://ftp.ietf.org/internet-=
drafts/</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>_______________________________________________</span><o:p>=
</o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>I-D-Announce mailing list</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"mailto:I-D-Announce@ietf.org">I-D-Announce@ietf.org</a></span><o:=
p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"https://www.ietf.org/mailman/listinfo/i-d-announce">https://www.i=
etf..org/mailman/listinfo/i-d-announce</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Internet-Draft directories: <a =
href=3D"http://www.ietf.org/shadow.html">http://www.ietf.org/shadow.html<=
/a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>or <a =
href=3D"ftp://ftp.ietf.org/ietf/1shadow-sites.txt">ftp://ftp.ietf.org/iet=
f/1shadow-sites.txt</a></span><o:p></o:p></pre></div></div></div></div></=
blockquote><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></body></html>
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
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Subject: Re: [Dots] Opsdir last call review of draft-ietf-dots-requirements-16
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and for me

Scott

> On Nov 26, 2018, at 5:11 AM, Konda, Tirumaleswar Reddy =
<TirumaleswarReddy_Konda@McAfee.com> wrote:
>=20
>> -----Original Message-----
>> From: mohamed.boucadair@orange.com <mohamed.boucadair@orange.com>
>> Sent: Monday, November 26, 2018 1:02 PM
>> To: Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>;
>> Scott Bradner <sob@sobco.com>; ops-dir@ietf.org
>> Cc: draft-ietf-dots-requirements.all@ietf.org; ietf@ietf.org; =
dots@ietf.org
>> Subject: RE: Opsdir last call review of =
draft-ietf-dots-requirements-16
>>=20
>> This email originated from outside of the organization. Do not click =
links or
>> open attachments unless you recognize the sender and know the content =
is safe.
>>=20
>> Hi Tiru, all,
>>=20
>> Please see inline.
>>=20
>> Cheers,
>> Med
>>=20
>>> -----Message d'origine-----
>>> De : Dots [mailto:dots-bounces@ietf.org] De la part de Konda,
>>> Tirumaleswar Reddy Envoy=C3=A9 : lundi 26 novembre 2018 06:16 =C3=80 =
: Scott
>>> Bradner; ops-dir@ietf.org Cc :
>>> draft-ietf-dots-requirements.all@ietf.org; ietf@ietf.org;
>>> dots@ietf.org Objet : Re: [Dots] Opsdir last call review of
>>> draft-ietf-dots-requirements-16
>>>=20
>>> Hi Scott,
>>>=20
>>> Thanks for the review, Please see inline
>>>=20
>>>> -----Original Message-----
>>>> From: Scott Bradner <sob@sobco.com>
>>>> Sent: Sunday, November 25, 2018 2:03 AM
>>>> To: ops-dir@ietf.org
>>>> Cc: draft-ietf-dots-requirements.all@ietf.org; ietf@ietf.org;
>>>> dots@ietf.org
>>>> Subject: Opsdir last call review of draft-ietf-dots-requirements-16
>>>>=20
>>>> This email originated from outside of the organization. Do not =
click
>>>> links
>>> or
>>>> open attachments unless you recognize the sender and know the
>>>> content is
>>> safe.
>>>>=20
>>>> Reviewer: Scott Bradner
>>>> Review result: Has Nits
>>>>=20
>>>> This is an OPS-DIR review of Distributed Denial of Service (DDoS)
>>>> Open
>>> Threat
>>>> Signaling Requirements (draft-ietf-dots-requirements)
>>>>=20
>>>> This document lists requirements for a protocol to used between
>>>> providers
>>> of
>>>> DDOS mitigation services and users of such services, as such there
>>>> can be
>>> no
>>>> direct operational issues with the document.  I also did not find
>>>> any
>>> indirect
>>>> operational issues.
>>>>=20
>>>> I think the document would benefit from the addition of a section
>>>> before
>>> the
>>>> requirements section that specifically describes the setup assumed
>>>> by the document. The descriptions before there hint at a presumed
>>>> setup but a new section that clearly states the setup would be
>>>> helpful. (the setup appears
>>> to be
>>>> one where all network traffic to and from a protected entity flows
>>>> through
>>> a
>>>> DDoS mitigation service provider.  The provider includes one or =
more
>>>> DOTS servers.  The protected entity includes one or more DOTS
>>>> clients that communicate with the DOTS servers)
>>>=20
>>> The requirements drafts refers to the DOTS architecture draft that
>>> discusses the architectural relationships, components and concepts
>>> used in a DOTS deployment.
>>>=20
>>>>=20
>>>> Requirement SIG-005 addresses channel redirection =E2=80=93 maybe =
there
>>>> needs to be a way that clients can move to a new server on their =
own
>>>> if they lose
>>> hearbeat
>>>> from the server they were using =E2=80=93 that might include a way =
for a
>>>> server to provide a list of alternative servers to the clients
>>>=20
>>> We can update SIG-004 requirement to say the following:
>>>=20
>>> The DOTS client may be provided with a list of DOTS servers.
>>=20
>> [Med] IMHO given that the requirements I-D points to the architecture =
I-D, we
>> don't need to be redundant:
>>=20
>>   The DOTS client may be provided with a list of DOTS servers, each
>>   associated with one or more IP addresses.  These addresses may or =
may
>>   not be of the same address family.  The DOTS client establishes one
>>   or more sessions by connecting to the provided DOTS server =
addresses.
>>=20
>> But, of course it is not harmful to restate it if it helps the =
reader.
>>=20
>>  If the DOTS
>>> client considers the signal channel is defunct due to the extended
>>> absence of DOTS server heartbeat, the DOTS client can establish  a =
new
>>> DOTS signal channel with the other DOTS servers in the list.
>>>=20
>>=20
>> [Med] Some comments here:
>> * I would not mix server selection/server migration with server =
redirection.
>> That is, the proposed text is to be placed somewhere else in the I-D, =
not under
>> SIG-004.
>> * I would not describe the behavior (e.g., if xxx, establish a new =
session) in the
>> Requirements I-D, but focus on the expected functionality if we =
really need to
>> say something.
>> * A DOTS client provisioned with multiple dots server may already =
have other
>> sessions established. How those sessions are established is =
policy-based.
>> * Establishing a new session should be carefully considered to avoid, =
e.g.,
>> leaking information among servers not belonging to the same domain or
>> oscillate between servers.
>>=20
>> We can include a generic text such as the following:
>>=20
>>  "Additional means to enhance the resilience of DOTS protocols, =
including
>> when multiple DOTS servers are provisioned to the DOTS clients, =
SHOULD be
>> considered."
>=20
> Works for me.
>=20
> -Tiru
>=20
>>=20
>>=20
>>> -Tiru
>>>=20
>>>>=20
>>>=20
>>> _______________________________________________
>>> Dots mailing list
>>> Dots@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dots


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Jon Shallow <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Panwei (William)" <william.panwei@huawei.com>
Thread-Topic: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>, "Panwei (William)" <william.panwei@huawei.com>
Thread-Topic: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: <mohamed.boucadair@orange.com>, <dots@ietf.org>, "'Konda, Tirumaleswar Reddy'" <TirumaleswarReddy_Konda@mcafee.com>, "'kaname nishizuka'" <kaname@nttv6.jp>, "Panwei \(William\)" <william.panwei@huawei.com>
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Date: Mon, 26 Nov 2018 17:02:34 -0000
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Hi Tiru / Med

=20

Does=20

=20

=E2=80=9CIf there is no match during peace time, then there is no action =
to be taken against the packet. If there is no match during active =
mitigation, then the packet will still be scrubbed by the DDoS =
mitigator.=E2=80=9D

=20

cover the situation when one or more ACLs is =
=E2=80=9Cactivation-type=E2=80=9D :=3D =E2=80=9Cimmediate=E2=80=9D?

- ACLs are active, even if peace-time

- The statement does works for =E2=80=9Cactivation-type=E2=80=9D :=3D =
=E2=80=9Cactivate-when-mitigating=E2=80=9D

=20

I think we still need to better define what happens when there is not an =
ACL match.

=20

Regards

=20

Jon

=20

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of =
ietf-supjps-mohamed.boucadair@orange.com
Sent: 26 November 2018 13:14
To: Konda, Tirumaleswar Reddy; Jon Shallow; 'kaname nishizuka'; =
dots@ietf.org; Panwei (William)
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Re-,

=20

Works for me.

=20

Cheers,

Med

=20

De : Konda, Tirumaleswar Reddy =
[mailto:TirumaleswarReddy_Konda@McAfee.com]=20
Envoy=C3=A9 : lundi 26 novembre 2018 13:42
=C3=80 : Jon Shallow; 'kaname nishizuka'; dots@ietf.org; BOUCADAIR =
Mohamed TGI/OLN; Panwei (William)
Objet : RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Jon,

=20

We need both the lines.

NEW:

If there is no match during peace time, then there is no action to be =
taken against the packet. If there is no match during active mitigation, =
then the packet will still be scrubbed by the DDoS mitigator.

=20

Cheers,

-Tiru

=20

From: Jon Shallow <supjps-ietf@jpshallow.com>=20
Sent: Monday, November 26, 2018 3:55 PM
To: 'kaname nishizuka' <kaname@nttv6.jp>; dots@ietf.org; Konda, =
Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>; =
mohamed.boucadair@orange.com; Panwei (William) =
<william.panwei@huawei.com>
Subject: RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20


CAUTION: External email. Do not click links or open attachments unless =
you recognize the sender and know the content is safe.

  _____ =20

Hi Kaname,

=20

Unfortunately, implementing the (effectively white-list and black-list =
lists) DOTS ACLs in an upstream router to the DDoS Mitigator will kill =
off all traffic that does not match the ACLs =E2=80=93 unless there is a =
final hidden, implicit ACL that accepts all the remaining traffic.

=20

My tri-state issue perhaps comes more from the I-D DOTS Data Channel =
than this draft, but does still apply to this draft as it is defining =
what can be controlled by the Signal channel.

=20

Perhaps my concerns can be addressed instead by replacing in the I-D =
DOTS Data Channel (in 4.1)

=20

=E2=80=9CIf there is no match, then there is no action to be taken =
against the packet.=E2=80=9D

=20

With

=20

=E2=80=9CIf there is no match, then the packet will still be mitigated =
by the DOTS mitigator (how is out of scope) if a mitigation is =
active.=E2=80=9D

=20

Regards

=20

Jon

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of kaname nishizuka
Sent: 26 November 2018 08:33
To: Konda, Tirumaleswar Reddy; Jon Shallow; 'Panwei (William)'; =
dots@ietf.org; mohamed.boucadair@orange.com
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Jon,

Yes, I agree with Tiru.
I can hit upon an example that ACLs are implemented on a router in front =
of a mitigator.
In this case, keeping the model of ACLs to be same as the =
draft-ietf-netmod-acl-model will make deployment easier.

regards,
Kaname

On 2018/11/26 15:06, Konda, Tirumaleswar Reddy wrote:

Hi Jon,

=20

If the DOTS client believes the traffic from the accept-list sources =
will not attack its targets, it configures the accept-list filtering =
rules. The draft-nishizuka-dots-signal-control-filtering is  dealing =
with an attack scenario where the accept-list sources are either spoofed =
or compromised to attack the target.=20

=20

Irrespective of whether accept-list rules are configured or not, all =
incoming traffic will be scrubbed and the DOTS client will be notified =
if the accept-list sources are attacking target. It is then up to the =
DOTS client to make a call and de-activate the accept-list rules.=20

The DOTS client with DDoS detection capability can also identify and =
de-activate the accept-list rules during attack even without the =
conflict notification from the DOTS server.=20

=20

Since all traffic to the target will anyway be scrubbed during DDoS =
mitigation, I don=E2=80=99t see the need to configure a =
=E2=80=9Caccept+mitigate=E2=80=9D.  The =E2=80=9Cno action=E2=80=9D does =
not mean the traffic (not matching the filtering rules) will by-pass =
scrubbing by the DDoS mitigator.

=20

Cheers,

-Tiru

=20

From: Jon Shallow  <mailto:supjps-ietf@jpshallow.com> =
<supjps-ietf@jpshallow.com>=20
Sent: Friday, November 23, 2018 4:42 PM
To: 'Panwei (William)'  <mailto:william.panwei@huawei.com> =
<william.panwei@huawei.com>; dots@ietf.org; =
mohamed.boucadair@orange.com; Konda, Tirumaleswar Reddy  =
<mailto:TirumaleswarReddy_Konda@McAfee.com> =
<TirumaleswarReddy_Konda@McAfee.com>; 'kaname nishizuka'  =
<mailto:kaname@nttv6.jp> <kaname@nttv6.jp>
Subject: RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20


CAUTION: External email. Do not click links or open attachments unless =
you recognize the sender and know the content is safe.


  _____ =20


Hi There,

=20

This thread has flagged up to me that we are trying to represent a =
tri-state of actions (=E2=80=9Calways-drop=E2=80=9D, =
=E2=80=9Calways-let-through=E2=80=9D and =
=E2=80=9Clet-through-if-after-being-mitigated-it-is-allowed=E2=80=9D) =
with a duo-state of =E2=80=9Caccept-list=E2=80=9D and =
=E2=80=9Cdrop-list=E2=80=9D in the (Data Channel) ACLs.

=20

The traditional ACL is a set of match criteria and then an appropriate =
action if matched. =20

[As a separate note, picked up later, it has always been unclear in my =
mind over many years as to what happens if a packet does not trigger a =
match in any of the ACLs (falls off the end of the list).  What happens =
is usually defined by documentation of what actually happens in the =
underlying logic.  The Data Channel currently states =E2=80=9CIf there =
is no match, then there is no action to be taken against the =
packet.=E2=80=9D.]

The Data Channel only defines the DOTS forwarding actions as =
=E2=80=98accept=E2=80=99 or =E2=80=98drop=E2=80=99 with the addition of =
=E2=80=98rate-limit=E2=80=99 if =E2=80=98accept=E2=80=99 is defined.

It does state that, as an example, =E2=80=9CAccept-list management, =
which enables a DOTS client to inform a DOTS server about sources from =
which traffic should always be accepted=E2=80=9D which implies that =
=E2=80=98accept=E2=80=99 is the same as what we knew as white-list.  =
However, =E2=80=98accept=E2=80=99 means just that =E2=80=93 it is =
accepted at this point in the process.  Yes, it is effectively defined =
as a white list in the requirements document, but even though those =
working with the DOTS documents can get confused as they also are =
thinking about mitigate or mitigation [Is it accepted for mitigation, or =
is it unconditionally accepted?].

=20

We need the DOTS server to clearly understand the tri-state, and  cause =
(how is out of scope) traffic to be always accepted, always dropped or =
be analysed to see if it needs to be mitigated.

=20

In terms of moving forward, we could (in Data Channel) have an =
additional =E2=80=98leaf mitigate=E2=80=99 in =E2=80=98container =
actions=E2=80=99 which is only available when =E2=80=98accept=E2=80=99.  =
If true, traffic is passed to a mitigator (how out of scope), if false =
traffic is always passed through. (=E2=80=98leaf rate-limit=E2=80=99 is =
a special case of mitigation I guess.)

Alternatively, we could have actions of =E2=80=98accept=E2=80=99, =
=E2=80=98drop=E2=80=99 or =E2=80=98mitigate=E2=80=99.  =
=E2=80=98accept=E2=80=99 would then have the traditional meaning of pass =
=E2=80=93 effectively a white-list as previously intended, and =
=E2=80=98mitigate=E2=80=99 much clearer to the reader as to the intent.  =
Then we just need a definition for =E2=80=9CMitigate-List:=E2=80=9D.  I =
think =E2=80=98rate-limit=E2=80=99 would then have to only be associated =
with =E2=80=98mitigate=E2=80=99, not =E2=80=98accept=E2=80=99 as =
=E2=80=98accept=E2=80=99 is whitelist(no expected additional action).

=20

Using =E2=80=98accept=E2=80=99, =E2=80=98drop=E2=80=99 or =
=E2=80=98mitigate=E2=80=99 (or =E2=80=98accept + mitigate=E2=80=99, =
=E2=80=98accept + no-mitigate=E2=80=99 or =E2=80=98drop=E2=80=99 if =
going with the additional leaf suggestion) makes it much easier to =
directly instantiate these actions in the DOTS server environment.

=20

That then just leaves the question of what happens if there are no ACL =
matches (there could be no ACLs defined).  Do we go for an implied last =
ACL of all other traffic is to be mitigated if mitigating (Signal =
channel request), or do we take =E2=80=98no action=E2=80=99 as defined =
in the Data Channel?

=20

Regards

=20

Jon

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of Panwei (William)
Sent: 23 November 2018 08:25
To: Konda, Tirumaleswar Reddy; mohamed.boucadair@orange.com
Cc: dots@ietf.org; kaname nishizuka
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Tiru, Med,

=20

Thank you for explaining and reminding me. I just remembered that this =
terminology has already been described in the requirement draft.

Accept-list: A list of filters indicating sources from which traffic

should always be allowed, regardless of contradictory data gleaned

in a detected attack.

=20

Best Regards

Wei Pan

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: Konda, Tirumaleswar Reddy =
[mailto:TirumaleswarReddy_Konda@McAfee.com]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2018=E5=B9=B411=E6=9C=8823=E6=97=A5 16:07
=E6=94=B6=E4=BB=B6=E4=BA=BA: mohamed.boucadair@orange.com; Panwei =
(William) <william.panwei@huawei.com>; kaname nishizuka =
<kaname@nttv6.jp>
=E6=8A=84=E9=80=81: dots@ietf.org
=E4=B8=BB=E9=A2=98: RE: Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

If accept-listed sources are attacking the target, the DOTS server =
cannot turn-off the accept-list filtering rules without the consent from =
the DOTS client. DOTS server can inform the DOTS client of the conflict =
and/or the DOTS client with DDoS detection capability can identify the =
attack, and using the signal channel de-activate the accept-list =
filtering rules.

=20

=E2=80=9Caccept-list=E2=80=9D does not mean only the traffic matching =
the accept-list will be allowed to reach the target.=20

=20

Cheers,

-Tiru

=20

From: Dots <dots-bounces@ietf.org> On Behalf Of =
mohamed.boucadair@orange.com
Sent: Friday, November 23, 2018 12:04 PM
To: Panwei (William) <william.panwei@huawei.com>; kaname nishizuka =
<kaname@nttv6.jp>
Cc: dots@ietf.org
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20


CAUTION: External email. Do not click links or open attachments unless =
you recognize the sender and know the content is safe.


  _____ =20


Hi Wei,=20

=20

Please see inline.

=20

Cheers,

Med

=20

De : Dots [mailto:dots-bounces@ietf.org] De la part de Panwei (William)
Envoy=C3=A9 : vendredi 23 novembre 2018 04:09
=C3=80 : kaname nishizuka
Cc : dots@ietf.org
Objet : [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Kaname,

=20

I have read your draft recently, and I have two suggestions about it.

1.      I=E2=80=99d like to suggest using =E2=80=9Cwhitelist=E2=80=9D or =
=E2=80=9CDDoS detection whitelist=E2=80=9D instead of =
=E2=80=9Caccept-list=E2=80=9D in the typical case.

=20

[Med] accept-list means white-list. accept-list is already used in DOTS =
requirements and data channel. The signal channel will make use of that =
term too. FWIW, that change is made because of what was reported by =
hrpc.=20

=20

A typical case is a DOTS client which configures during peace time

filtering rules using data channel to permit traffic from accept-

listed sources, but during the volumetric DDoS attack the DDoS

mitigator identifies the source addresses/prefixes in the accept-

listed filtering rules are attacking the target. For example, an

attacker can spoof the IP addresses of accept-listed sources to

generate attack traffic or the attacker can compromise the accept-

listed sources and program them to launch DDoS attack.

In this typical case, when you use =E2=80=9Caccept-list=E2=80=9D, it =
sounds like that only the traffic which match the accept-list can reach =
the target. I don=E2=80=99t know if you mean so, but if YES, I feel like =
the extension may not be essentially needed in such case. Because if a =
DDoS attack occurs in such situation, the attacker must have been =
included in the accept-list. The DOTS server can get this conclusion as =
the DOTS client can, so the DOTS server can de-activate the accept-list =
by its own without DOTS client=E2=80=99s request of filtering rules.=20

In my opinion, =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS detection =
whitelist=E2=80=9D is more suitable than  =E2=80=9Caccept-list=E2=80=9D. =
Because it indicates that the traffic which doesn=E2=80=99t match the =
DDoS whitelist can also reach the target, as long as it passes the =
detection. And if a DDoS attack happens, the DOTS server can=E2=80=99t =
know if the attacker is in the whitelist. If DOTS client find that the =
attacker is included in the DDoS whitelist, it must request the DOTS =
server to de-activate the whitelist.

=20

I=E2=80=99m not object to your case, I just want to make it clear and no =
misunderstanding.

=20

2. I=E2=80=99d like to suggest adding a guideline or suggestion about =
using signal channel to control filtering rules.

The purpose of using DOTS signal channel to control filtering rules is =
trying to help mitigate the DDoS attack when under attack time. This =
purpose should also be the guideline.=20

Requests which can help mitigate the attack should be send by the signal =
channel immediately. Requests which can=E2=80=99t help mitigate the =
attack should wait for the data channel to be re-established and then be =
sent by the data channel.

For example, during attack time, de-activating a drop-list (or =
blacklist) or activating a accept-list (or whitelist) may usually not =
help mitigate the DDoS attack. So If there is no necessary reason, these =
two requests should wait for using the data channel.

=20

[Med] Agree. We do have the following in -01:

=20

   A DOTS client relies on the information received from the DOTS server

   and/or local information to the DOTS client domain to trigger a

   filter control request.  Obviously, only filters that are pertinent

   for an ongoing mitigation should be controlled by a DOTS client using

   the DOTS signal channel.

=20

And

=20

   The DOTS client can also decide to send a PUT request to deactivate

   the "an-accept-list" ACL, if suspect traffic is received from an

   accept-listed source (2001:db8:1234::/48).  The structure of that PUT

   is the same as the one shown in Figure 4.

=20

=20

Best Regards

Wei Pan

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: Dots [mailto:dots-bounces@ietf.org] =
=E4=BB=A3=E8=A1=A8 kaname nishizuka
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2018=E5=B9=B411=E6=9C=8821=E6=97=A5 9:50
=E6=94=B6=E4=BB=B6=E4=BA=BA: dots@ietf.org
=E4=B8=BB=E9=A2=98: [Dots] Fwd: I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt

=20

Hi,

Base on the discussion of Bangkok interop: control data channel =
filtering via signal channel,
we've submitted the new draft for an extension to the DOTS signal =
channel to control the filtering rules during attack mitigation.

thanks,
Kaname Nishizuka



-------- Forwarded Message --------=20


Subject:=20

I-D Action: draft-nishizuka-dots-signal-control-filtering-00.txt


Date:=20

Tue, 20 Nov 2018 17:42:13 -0800


From:=20

internet-drafts@ietf.org


Reply-To:=20

internet-drafts@ietf.org


To:=20

i-d-announce@ietf.org

=20

A New Internet-Draft is available from the on-line Internet-Drafts =
directories.
=20
=20
        Title           : Controlling Filtering Rules Using DOTS Signal =
Channel
        Authors         : Kaname Nishizuka
                          Takahiko Nagata
                          Tirumaleswar Reddy
                          Mohamed Boucadair
    Filename        : =
draft-nishizuka-dots-signal-control-filtering-00.txt
    Pages           : 11
    Date            : 2018-11-20
=20
Abstract:
   This document specifies an extension to the DOTS signal channel to
   control the filtering rules during attack mitigation.
=20
   This extension allows a DOTS client to activate or de-activate
   filtering rules during a DDoS attack.  The characterization of these
   filters is supposed to be conveyed by a DOTS client during peace time
   by means of DOTS data channel.
=20
Editorial Note (To be removed by RFC Editor)
=20
   Please update these statements within the document with the RFC
   number to be assigned to this document:
=20
   o  "This version of this YANG module is part of RFC XXXX;"
=20
   o  "RFC XXXX: Controlling Filtering Rules Using DOTS Signal Channel";
=20
   o  reference: RFC XXXX
=20
   o  [RFCXXXX]
=20
   Please update these statements with the RFC number to be assigned to
   the following documents:
=20
   o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Signal Channel Specification" (used to be
      [I-D.ietf-dots-signal-channel])
=20
   o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Data Channel Specification" (used to be
      [I-D.ietf-dots-data-channel])
=20
   Please update the "revision" date of the YANG module.
=20
=20
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-filt=
ering/
=20
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filtering=
-00
https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-control=
-filtering-00
=20
=20
Please note that it may take a couple of minutes from the time of =
submission
until the htmlized version and diff are available at tools.ietf.org.
=20
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
=20
_______________________________________________
I-D-Announce mailing list
I-D-Announce@ietf.org
https://www.ietf..org/mailman/listinfo/i-d-announce =
<https://www.ietf.org/mailman/listinfo/i-d-announce>=20
Internet-Draft directories: http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

=20


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</o:shapelayout></xml><![endif]--></head><body bgcolor=3Dwhite =
lang=3DEN-GB link=3Dblue vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Tiru / Med<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Does <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9C</span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If there is no match during peace time, then there is no action to be =
taken against the packet. If there is no match during active mitigation, =
then the packet will still be scrubbed by the DDoS =
mitigator.=E2=80=9D<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>cover the situation when one or more ACLs is =
=E2=80=9Cactivation-type=E2=80=9D :=3D =
=E2=80=9Cimmediate=E2=80=9D?<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>- ACLs are active, even if peace-time<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>- The statement does works for =E2=80=9Cactivation-type=E2=80=9D :=3D =
=E2=80=9Cactivate-when-mitigating=E2=80=9D<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I think we still need to better define what happens when there is not =
an ACL match.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: dots-bounces@ietf.org] <b>On Behalf Of =
</b>ietf-supjps-mohamed.boucadair@orange.com<br><b>Sent:</b> 26 November =
2018 13:14<br><b>To:</b> Konda, Tirumaleswar Reddy; Jon Shallow; 'kaname =
nishizuka'; dots@ietf.org; Panwei (William)<br><b>Subject:</b> Re: =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Re-,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Works for me.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Cheers,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Med<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>De&nbsp;:</span></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Konda, Tirumaleswar Reddy =
[mailto:TirumaleswarReddy_Konda@McAfee.com] =
<br><b>Envoy=C3=A9&nbsp;:</b> lundi 26 novembre 2018 =
13:42<br><b>=C3=80&nbsp;:</b> Jon Shallow; 'kaname nishizuka'; =
dots@ietf.org; BOUCADAIR Mohamed TGI/OLN; Panwei =
(William)<br><b>Objet&nbsp;:</b> RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><span =
lang=3DFR><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Hi Jon,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>We need both the lines.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>NEW:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If there is no match during peace time, then there is no action to be =
taken against the packet. If there is no match during active mitigation, =
then the packet will still be scrubbed by the DDoS =
mitigator.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Cheers,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>-Tiru</span><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'> Jon Shallow &lt;supjps-ietf@jpshallow.com&gt; <br><b>Sent:</b> =
Monday, November 26, 2018 3:55 PM<br><b>To:</b> 'kaname nishizuka' =
&lt;kaname@nttv6.jp&gt;; dots@ietf.org; Konda, Tirumaleswar Reddy =
&lt;TirumaleswarReddy_Konda@McAfee.com&gt;; =
mohamed.boucadair@orange.com; Panwei (William) =
&lt;william.panwei@huawei.com&gt;<br><b>Subject:</b> RE: [Dots] =
Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><table =
class=3DMsoNormalTable border=3D1 cellspacing=3D3 cellpadding=3D0 =
style=3D'background:#F3FF33;border:solid #9B9A87 1.5pt'><tr><td =
style=3D'border:none;padding:.75pt .75pt .75pt .75pt'><p><strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>CAUTION</span></=
strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>:</span><span =
style=3D'font-family:"Arial","sans-serif"'> External email. Do not click =
links or open attachments unless you recognize the sender and know the =
content is safe.<o:p></o:p></span></p></td></tr></table><div =
class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><hr size=3D2 width=3D"100%" align=3Dcenter></span></div></div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Kaname,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Unfortunately, implementing the (effectively white-list and =
black-list lists) DOTS ACLs in an upstream router to the DDoS Mitigator =
will kill off all traffic that does not match the ACLs =E2=80=93 unless =
there is a final hidden, implicit ACL that accepts all the remaining =
traffic.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>My tri-state issue perhaps comes more from the I-D DOTS Data Channel =
than this draft, but does still apply to this draft as it is defining =
what can be controlled by the Signal channel.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Perhaps my concerns can be addressed instead by replacing in the I-D =
DOTS Data Channel (in 4.1)<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9CIf there is no match, then there is no action to be taken =
against the packet.=E2=80=9D<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>With<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9CIf there is no match, then the packet will still be =
mitigated by the DOTS mitigator (how is out of scope) if a mitigation is =
active.=E2=80=9D<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: <a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>] <b>On =
Behalf Of </b>kaname nishizuka<br><b>Sent:</b> 26 November 2018 =
08:33<br><b>To:</b> Konda, Tirumaleswar Reddy; Jon Shallow; 'Panwei =
(William)'; <a href=3D"mailto:dots@ietf.org">dots@ietf.org</a>; <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Subject:</b> Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>Hi Jon,<br><br>Yes, I agree with =
Tiru.<br>I can hit upon an example that ACLs are implemented on a router =
in front of a mitigator.<br>In this case, keeping the model of ACLs to =
be same as the draft-ietf-netmod-acl-model will make deployment =
easier.<br><br>regards,<br>Kaname<o:p></o:p></p><div><p =
class=3DMsoNormal>On 2018/11/26 15:06, Konda, Tirumaleswar Reddy =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Hi Jon,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>If the DOTS client believes the traffic from the accept-list =
sources will not attack its targets, it configures the accept-list =
filtering rules. The draft-nishizuka-dots-signal-control-filtering is =
&nbsp;dealing with an attack scenario where the accept-list sources are =
either spoofed or compromised to attack the target. =
</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Irrespective of whether accept-list rules are configured or not, =
all incoming traffic will be scrubbed and the DOTS client will be =
notified if the accept-list sources are attacking target. It is then up =
to the DOTS client to make a call and de-activate the accept-list rules. =
</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>The DOTS client with DDoS detection capability can also identify =
and de-activate the accept-list rules during attack even without the =
conflict notification from the DOTS server. </span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Since all traffic to the target will anyway be scrubbed during =
DDoS mitigation, I don=E2=80=99t see the need to configure a =
=E2=80=9Caccept+mitigate=E2=80=9D. &nbsp;The =E2=80=9Cno action=E2=80=9D =
does not mean the traffic (not matching the filtering rules) will =
by-pass scrubbing by the DDoS mitigator.</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>-Tiru</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>From:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'> Jon Shallow <a =
href=3D"mailto:supjps-ietf@jpshallow.com">&lt;supjps-ietf@jpshallow.com&g=
t;</a> <br><b>Sent:</b> Friday, November 23, 2018 4:42 PM<br><b>To:</b> =
'Panwei (William)' <a =
href=3D"mailto:william.panwei@huawei.com">&lt;william.panwei@huawei.com&g=
t;</a>; <a href=3D"mailto:dots@ietf.org">dots@ietf.org</a>; <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a>; Konda, Tirumaleswar Reddy <a =
href=3D"mailto:TirumaleswarReddy_Konda@McAfee.com">&lt;TirumaleswarReddy_=
Konda@McAfee.com&gt;</a>; 'kaname nishizuka' <a =
href=3D"mailto:kaname@nttv6.jp">&lt;kaname@nttv6.jp&gt;</a><br><b>Subject=
:</b> RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><div><table =
class=3DMsoNormalTable border=3D1 cellspacing=3D3 cellpadding=3D0 =
style=3D'background:#F3FF33;border:solid #9B9A87 1.5pt'><tr><td =
style=3D'border:none;padding:.75pt .75pt .75pt .75pt'><p><strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>CAUTION</span></=
strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>:</span><span =
style=3D'font-family:"Arial","sans-serif"'> External email. Do not click =
links or open attachments unless you recognize the sender and know the =
content is safe.</span><o:p></o:p></p></td></tr></table><div =
class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><hr size=3D2 width=3D"100%" align=3Dcenter></span></div></div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi There,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>This thread has flagged up to me that we are trying to represent a =
tri-state of actions (=E2=80=9Calways-drop=E2=80=9D, =
=E2=80=9Calways-let-through=E2=80=9D and =
=E2=80=9Clet-through-if-after-being-mitigated-it-is-allowed=E2=80=9D) =
with a duo-state of =E2=80=9Caccept-list=E2=80=9D and =
=E2=80=9Cdrop-list=E2=80=9D in the (Data Channel) =
ACLs.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The traditional ACL is a set of match criteria and then an =
appropriate action if matched.&nbsp; </span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>[As a separate note, picked up later, it has always been unclear in =
my mind over many years as to what happens if a packet does not trigger =
a match in any of the ACLs (falls off the end of the list). &nbsp;What =
happens is usually defined by documentation of what actually happens in =
the underlying logic.&nbsp; The Data Channel currently states =
=E2=80=9CIf there is <b>no match</b>, then there is <b>no action</b> to =
be taken against the packet.=E2=80=9D.]</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The Data Channel only defines the DOTS forwarding actions as =
=E2=80=98accept=E2=80=99 or =E2=80=98drop=E2=80=99 with the addition of =
=E2=80=98rate-limit=E2=80=99 if =E2=80=98accept=E2=80=99 is =
defined.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>It does state that, as an example, =E2=80=9CAccept-list management, =
which enables a DOTS client to inform a DOTS server about sources from =
which traffic should always be accepted=E2=80=9D which implies that =
=E2=80=98accept=E2=80=99 is the same as what we knew as =
white-list.&nbsp; However, =E2=80=98accept=E2=80=99 means just that =
=E2=80=93 it is accepted at this point in the process.&nbsp; Yes, it is =
effectively defined as a white list in the requirements document, but =
even though those working with the DOTS documents can get confused as =
they also are thinking about mitigate or mitigation [Is it accepted for =
mitigation, or is it unconditionally accepted?].</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>We need the DOTS server to clearly understand the tri-state, and =
&nbsp;cause (how is out of scope) traffic to be always accepted, always =
dropped or be analysed to see if it needs to be =
mitigated.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>In terms of moving forward, we could (in Data Channel) have an =
additional =E2=80=98leaf mitigate=E2=80=99 in =E2=80=98container =
actions=E2=80=99 which is only available when =
=E2=80=98accept=E2=80=99.&nbsp; If true, traffic is passed to a =
mitigator (how out of scope), if false traffic is always passed through. =
(=E2=80=98leaf rate-limit=E2=80=99 is a special case of mitigation I =
guess.)</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Alternatively, we could have actions of =E2=80=98accept=E2=80=99, =
=E2=80=98drop=E2=80=99 or =E2=80=98mitigate=E2=80=99.&nbsp; =
=E2=80=98accept=E2=80=99 would then have the traditional meaning of pass =
=E2=80=93 effectively a white-list as previously intended, and =
=E2=80=98mitigate=E2=80=99 much clearer to the reader as to the =
intent.&nbsp; Then we just need a definition for =
=E2=80=9CMitigate-List:=E2=80=9D.&nbsp; I think =
=E2=80=98rate-limit=E2=80=99 would then have to only be associated with =
=E2=80=98mitigate=E2=80=99, not =E2=80=98accept=E2=80=99 as =
=E2=80=98accept=E2=80=99 is whitelist(no expected additional =
action).</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Using =E2=80=98accept=E2=80=99, =E2=80=98drop=E2=80=99 or =
=E2=80=98mitigate=E2=80=99 (or =E2=80=98accept + mitigate=E2=80=99, =
=E2=80=98accept + no-mitigate=E2=80=99 or =E2=80=98drop=E2=80=99 if =
going with the additional leaf suggestion) makes it much easier to =
directly instantiate these actions in the DOTS server =
environment.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>That then just leaves the question of what happens if there are no =
ACL matches (there could be no ACLs defined).&nbsp; Do we go for an =
implied last ACL of all other traffic is to be mitigated if mitigating =
(Signal channel request), or do we take =E2=80=98no action=E2=80=99 as =
defined in the Data Channel?</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: <a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>] <b>On =
Behalf Of </b>Panwei (William)<br><b>Sent:</b> 23 November 2018 =
08:25<br><b>To:</b> Konda, Tirumaleswar Reddy; <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Cc:</b> <a href=3D"mailto:dots@ietf.org">dots@ietf.org</a>; =
kaname nishizuka<br><b>Subject:</b> Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Hi Tiru, =
Med,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Thank you =
for explaining and reminding me. I just remembered that this terminology =
has already been described in the requirement =
draft.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd;text-autospace:none'><span=
 =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>Accept-li=
st: A list of filters indicating sources from which =
traffic</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd;text-autospace:none'><span=
 style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>should =
always be allowed, regardless of contradictory data =
gleaned</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd'><span =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>in a =
detected attack.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'text-align:justify'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Best =
Regards</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'text-align:justify'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Wei =
Pan</span><o:p></o:p></p></div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E4=BB=B6=E4=BA=BA</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
Konda, Tirumaleswar Reddy [<a =
href=3D"mailto:TirumaleswarReddy_Konda@McAfee.com">mailto:TirumaleswarRed=
dy_Konda@McAfee.com</a>] <br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
2018</span><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E5=B9=B4</span><span =
style=3D'font-size:11.0pt'>11</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=9C=88</span><span =
style=3D'font-size:11.0pt'>23</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=97=A5</span><span =
style=3D'font-size:11.0pt'> 16:07<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=94=B6=E4=BB=B6=E4=BA=BA</span></b=
><b><span style=3D'font-size:11.0pt'>:</span></b><span =
style=3D'font-size:11.0pt'> <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a>; Panwei (William) &lt;<a =
href=3D"mailto:william.panwei@huawei.com">william.panwei@huawei.com</a>&g=
t;; kaname nishizuka &lt;<a =
href=3D"mailto:kaname@nttv6.jp">kaname@nttv6.jp</a>&gt;<br></span><b><spa=
n lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=8A=84=E9=80=81</span></b><b><span=
 style=3D'font-size:11.0pt'>:</span></b><span =
style=3D'font-size:11.0pt'> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br></span><b><span =
lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E4=B8=BB</span></b><b><span =
lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E9=A2=98</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
RE: Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'>&nbsp;<o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>If accept-listed sources are attacking the target, the DOTS server =
cannot turn-off the accept-list filtering rules without the consent from =
the DOTS client. DOTS server can inform the DOTS client of the conflict =
and/or the DOTS client with DDoS detection capability can identify the =
attack, and using the signal channel de-activate the accept-list =
filtering rules.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>=E2=80=9Caccept-list=E2=80=9D does not mean only the traffic =
matching the accept-list will be allowed to reach the target. =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>-Tiru</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>From:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'> Dots &lt;<a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>&gt; =
<b>On Behalf Of </b><a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Sent:</b> Friday, November 23, 2018 12:04 PM<br><b>To:</b> =
Panwei (William) &lt;<a =
href=3D"mailto:william.panwei@huawei.com">william.panwei@huawei.com</a>&g=
t;; kaname nishizuka &lt;<a =
href=3D"mailto:kaname@nttv6.jp">kaname@nttv6.jp</a>&gt;<br><b>Cc:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Subject:</b> Re: =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'>&nbsp;<o:p></o:p></p><di=
v><table class=3DMsoNormalTable border=3D1 cellspacing=3D3 =
cellpadding=3D0 =
style=3D'margin-left:21.0pt;background:#F3FF33;border:solid #9B9A87 =
1.5pt'><tr><td style=3D'border:none;padding:.75pt .75pt .75pt =
.75pt'><p><strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>CAUTION</span></=
strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>:</span><span =
style=3D'font-family:"Arial","sans-serif"'> External email. Do not click =
links or open attachments unless you recognize the sender and know the =
content is safe.</span><o:p></o:p></p></td></tr></table><div =
style=3D'margin-bottom:3.6pt'><div =
style=3D'margin-left:21.0pt;margin-bottom:5.0pt'><div =
style=3D'margin-left:21.0pt'><div style=3D'margin-left:21.0pt'><div =
style=3D'margin-left:21.0pt'><div class=3DMsoNormal align=3Dcenter =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd;text-align:center=
'><span lang=3DFR =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><hr size=3D2 width=3D"100%" =
align=3Dcenter></span></div></div></div></div></div></div></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Hi Wei, =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Please see =
inline.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Med</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>De&nbsp;:</span></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
<b>De la part de</b> Panwei (William)<br><b>Envoy=C3=A9&nbsp;:</b> =
vendredi 23 novembre 2018 04:09<br><b>=C3=80&nbsp;:</b> kaname =
nishizuka<br><b>Cc&nbsp;:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Objet&nbsp;:</b> =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
lang=3DFR>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Hi =
Kaname,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>I have =
read your draft recently, and I have two suggestions about =
it.</span><o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:93.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:6.25gd;text-indent:-18.0pt'><spa=
n =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>1.</span><s=
pan =
style=3D'font-size:7.0pt;color:windowtext'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
 </span><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>I=E2=80=99d=
 like to suggest using =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS =
detection whitelist=E2=80=9D instead of =E2=80=9Caccept-list=E2=80=9D in =
the typical case.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif"'>&nbsp;</span><o:p></o:p></p>=
<p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>[Med] =
accept-list means white-list. accept-list is already used in DOTS =
requirements and data channel. The signal channel will make use of that =
term too. FWIW, that change is made because of what was reported by =
hrpc. </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>A =
typical case is a DOTS client which configures during peace =
time</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>filtering=
 rules using data channel to permit traffic from =
accept-</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>listed =
sources, but during the volumetric DDoS attack the =
DDoS</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>mitigator=
 identifies the source addresses/prefixes in the =
accept-</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>listed =
filtering rules are attacking the target. For example, =
an</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>attacker =
can spoof the IP addresses of accept-listed sources =
to</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>generate =
attack traffic or the attacker can compromise the =
accept-</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd'><span =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>listed =
sources and program them to launch DDoS attack.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>In this =
typical case, when you use =E2=80=9Caccept-list=E2=80=9D, it sounds like =
that only the traffic which match the accept-list can reach the target. =
I don=E2=80=99t know if you mean so, but if YES, I feel like the =
extension may not be essentially needed in such case. Because if a DDoS =
attack occurs in such situation, the attacker must have been included in =
the accept-list. The DOTS server can get this conclusion as the DOTS =
client can, so the DOTS server can de-activate the accept-list by its =
own without DOTS client=E2=80=99s request of filtering rules. =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>In my =
opinion, =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS detection =
whitelist=E2=80=9D is more suitable than =
&nbsp;=E2=80=9Caccept-list=E2=80=9D. Because it indicates that the =
traffic which doesn=E2=80=99t match the DDoS whitelist can also reach =
the target, as long as it passes the detection. And if a DDoS attack =
happens, the DOTS server can=E2=80=99t know if the attacker is in the =
whitelist. If DOTS client find that the attacker is included in the DDoS =
whitelist, it must request the DOTS server to de-activate the =
whitelist.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>I=E2=80=99m=
 not object to your case, I just want to make it clear and no =
misunderstanding.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>2. =
I=E2=80=99d like to suggest adding a guideline or suggestion about using =
signal channel to control filtering rules.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>The =
purpose of using DOTS signal channel to control filtering rules is =
trying to help mitigate the DDoS attack when under attack time. This =
purpose should also be the guideline. </span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Requests =
which can help mitigate the attack should be send by the signal channel =
immediately. Requests which can=E2=80=99t help mitigate the attack =
should wait for the data channel to be re-established and then be sent =
by the data channel.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>For =
example, during attack time, de-activating a drop-list (or blacklist) or =
activating a accept-list (or whitelist) may usually not help mitigate =
the DDoS attack. So If there is no necessary reason, these two requests =
should wait for using the data channel.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>[Med] =
Agree. We do have the following in -01:</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; A DOTS client relies on the =
information received from the DOTS server</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; and/or local information to the =
DOTS client domain to trigger a</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; filter control request.&nbsp; =
Obviously, only filters that are pertinent</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; for an ongoing mitigation should =
be controlled by a DOTS client using</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; </span><span lang=3DFR =
style=3D'font-size:10.0pt'>the DOTS signal =
channel.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>And</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; The DOTS client can also decide =
to send a PUT request to deactivate</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; the &quot;an-accept-list&quot; =
ACL, if suspect traffic is received from an</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; accept-listed source =
(2001:db8:1234::/48).&nbsp; The structure of that =
PUT</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; is the same as the one shown in =
Figure 4.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd;text-align:justify'><span=
 style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Best =
Regards</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd;text-align:justify'><span=
 style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Wei =
Pan</span><o:p></o:p></p></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E4=BB=B6=E4=BA=BA</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
Dots [<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
</span><b><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E4=BB=A3=E8=A1=A8</span></b><b><span=
 lang=3DZH-CN style=3D'font-size:11.0pt;mso-fareast-language:ZH-CN'> =
</span></b><span style=3D'font-size:11.0pt'>kaname =
nishizuka<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
2018</span><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E5=B9=B4</span><span =
style=3D'font-size:11.0pt'>11</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=9C=88</span><span =
style=3D'font-size:11.0pt'>21</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=97=A5</span><span =
style=3D'font-size:11.0pt'> 9:50<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=94=B6=E4=BB=B6=E4=BA=BA</span></b=
><b><span style=3D'font-size:11.0pt'>:</span></b><span =
style=3D'font-size:11.0pt'> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br></span><b><span =
lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E4=B8=BB</span></b><b><span =
lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E9=A2=98</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
[Dots] Fwd: I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt</span><o:p></o:p></p=
></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'>&nbsp;<o:p></o:p></p><div=
><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'>Hi,<br><br>Base on the =
discussion of Bangkok interop: control data channel filtering via signal =
channel,<br>we've submitted the new draft for an extension to the DOTS =
signal channel to control the filtering rules during attack =
mitigation.<br><br>thanks,<br>Kaname Nishizuka<br><br><br><br>-------- =
Forwarded Message -------- <o:p></o:p></p><table class=3DMsoNormalTable =
border=3D0 cellspacing=3D0 cellpadding=3D0 =
style=3D'margin-left:42.0pt'><tr><td nowrap valign=3Dtop =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>Subject: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal>I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></p></td><=
/tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm 0cm 0cm 0cm'><p =
class=3DMsoNormal align=3Dright style=3D'text-align:right'><b>Date: =
</b><o:p></o:p></p></td><td style=3D'padding:0cm 0cm 0cm 0cm'><p =
class=3DMsoNormal>Tue, 20 Nov 2018 17:42:13 =
-0800<o:p></o:p></p></td></tr><tr><td nowrap valign=3Dtop =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>From: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal><a =
href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></p></td></tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm =
0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>Reply-To: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal><a =
href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></p></td></tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm =
0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>To: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal><a =
href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a><o:p></o:p=
></p></td></tr></table><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'>&nbsp;<o:p></o:p></p><pre=
 =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>A New =
Internet-Draft is available from the on-line Internet-Drafts =
directories.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Title&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
Controlling Filtering Rules Using DOTS Signal =
Channel</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Authors&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : Kaname =
Nishizuka</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; Takahiko Nagata</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; Tirumaleswar Reddy</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; Mohamed Boucadair</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp; =
Filename&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
draft-nishizuka-dots-signal-control-filtering-00.txt</span><o:p></o:p></p=
re><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp; =
Pages&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
11</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp; =
Date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
2018-11-20</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Abstract:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; This document specifies an extension to the =
DOTS signal channel to</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; control the filtering rules during attack =
mitigation.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; This extension allows a DOTS client to =
activate or de-activate</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; filtering rules during a DDoS attack.&nbsp; =
The characterization of these</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; filters is supposed to be conveyed by a DOTS =
client during peace time</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; by means of DOTS data =
channel.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Editorial =
Note (To be removed by RFC Editor)</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; Please update these statements within the =
document with the RFC</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; number to be assigned to this =
document:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;This version of this YANG =
module is part of RFC XXXX;&quot;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;RFC XXXX: Controlling Filtering =
Rules Using DOTS Signal Channel&quot;;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; reference: RFC =
XXXX</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; [RFCXXXX]</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; Please update these statements with the RFC =
number to be assigned to</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; the following =
documents:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;RFC SSSS: Distributed =
Denial-of-Service Open Threat Signaling</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) Signal Channel =
Specification&quot; (used to be</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
[I-D.ietf-dots-signal-channel])</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;RFC DDDD: Distributed =
Denial-of-Service Open Threat Signaling</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) Data Channel =
Specification&quot; (used to be</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
[I-D.ietf-dots-data-channel])</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; Please update the &quot;revision&quot; date =
of the YANG module.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>The IETF =
datatracker status page for this draft is:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-cont=
rol-filtering/">https://datatracker.ietf.org/doc/draft-nishizuka-dots-sig=
nal-control-filtering/</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>There are =
also htmlized versions available at:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-f=
iltering-00">https://tools.ietf.org/html/draft-nishizuka-dots-signal-cont=
rol-filtering-00</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal=
-control-filtering-00">https://datatracker.ietf.org/doc/html/draft-nishiz=
uka-dots-signal-control-filtering-00</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Please note =
that it may take a couple of minutes from the time of =
submission</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>until the =
htmlized version and diff are available at =
tools.ietf.org.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Internet-Drafts are also available by anonymous FTP =
at:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"ftp://ftp.ietf.org/internet-drafts/">ftp://ftp.ietf.org/internet-=
drafts/</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>_______________________________________________</span><o:p>=
</o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>I-D-Announce mailing list</span><o:p></o:p></pre><pre =
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margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"mailto:I-D-Announce@ietf.org">I-D-Announce@ietf.org</a></span><o:=
p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'><a =
href=3D"https://www.ietf.org/mailman/listinfo/i-d-announce">https://www.i=
etf..org/mailman/listinfo/i-d-announce</a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Internet-Draft directories: <a =
href=3D"http://www.ietf.org/shadow.html">http://www.ietf.org/shadow.html<=
/a></span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>or <a =
href=3D"ftp://ftp.ietf.org/ietf/1shadow-sites.txt">ftp://ftp.ietf.org/iet=
f/1shadow-sites.txt</a></span><o:p></o:p></pre></div></div></div></div></=
blockquote><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></div></body></html>
------=_NextPart_000_07B8_01D485A9.D527A760--


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From: <mohamed.boucadair@orange.com>
To: Jon Shallow <supjps-ietf@jpshallow.com>, "dots@ietf.org" <dots@ietf.org>,  "'Konda, Tirumaleswar Reddy'" <TirumaleswarReddy_Konda@mcafee.com>, "'kaname nishizuka'" <kaname@nttv6.jp>, "Panwei (William)" <william.panwei@huawei.com>
Thread-Topic: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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From nobody Mon Nov 26 11:53:04 2018
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: <mohamed.boucadair@orange.com>, <dots@ietf.org>, "'Konda, Tirumaleswar Reddy'" <TirumaleswarReddy_Konda@mcafee.com>, "'kaname nishizuka'" <kaname@nttv6.jp>, "Panwei \(William\)" <william.panwei@huawei.com>
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Subject: Re: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Hi Med,

=20

Does (adding in the word further)

=20

NEW:

=20

If there is no match during peace time, then there is no further action =
to be taken against the packet. If there is no match during active =
mitigation, then the packet will still be scrubbed by the DDoS =
mitigator.

=20

work for you?

=20

Regards

=20

Jon

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of =
mohamed.boucadair@orange.com
Sent: 26 November 2018 17:12
To: Jon Shallow; dots@ietf.org; 'Konda, Tirumaleswar Reddy'; 'kaname =
nishizuka'; Panwei (William)
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Re-,

=20

The new text applies for both immediate and activate-when-mitigate ACLs. =


=20

What do you think is missing in the proposed text? =20

=20

Thank you.

=20

Cheers,

Med

=20

De : Jon Shallow [mailto:supjps-ietf@jpshallow.com]=20
Envoy=C3=A9 : lundi 26 novembre 2018 18:03
=C3=80 : BOUCADAIR Mohamed TGI/OLN; dots@ietf.org; 'Konda, Tirumaleswar =
Reddy'; 'kaname nishizuka'; Panwei (William)
Objet : RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Tiru / Med

=20

Does=20

=20

=E2=80=9CIf there is no match during peace time, then there is no action =
to be taken against the packet. If there is no match during active =
mitigation, then the packet will still be scrubbed by the DDoS =
mitigator.=E2=80=9D

=20

cover the situation when one or more ACLs is =
=E2=80=9Cactivation-type=E2=80=9D :=3D =E2=80=9Cimmediate=E2=80=9D?

- ACLs are active, even if peace-time

- The statement does works for =E2=80=9Cactivation-type=E2=80=9D :=3D =
=E2=80=9Cactivate-when-mitigating=E2=80=9D

=20

I think we still need to better define what happens when there is not an =
ACL match.

=20

Regards

=20

Jon

=20

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of =
ietf-supjps-mohamed.boucadair@orange.com
Sent: 26 November 2018 13:14
To: Konda, Tirumaleswar Reddy; Jon Shallow; 'kaname nishizuka'; =
dots@ietf.org; Panwei (William)
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Re-,

=20

Works for me.

=20

Cheers,

Med

=20

De : Konda, Tirumaleswar Reddy =
[mailto:TirumaleswarReddy_Konda@McAfee.com]=20
Envoy=C3=A9 : lundi 26 novembre 2018 13:42
=C3=80 : Jon Shallow; 'kaname nishizuka'; dots@ietf.org; BOUCADAIR =
Mohamed TGI/OLN; Panwei (William)
Objet : RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Jon,

=20

We need both the lines.

NEW:

If there is no match during peace time, then there is no action to be =
taken against the packet. If there is no match during active mitigation, =
then the packet will still be scrubbed by the DDoS mitigator.

=20

Cheers,

-Tiru

=20

From: Jon Shallow <supjps-ietf@jpshallow.com>=20
Sent: Monday, November 26, 2018 3:55 PM
To: 'kaname nishizuka' <kaname@nttv6.jp>; dots@ietf.org; Konda, =
Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>; =
mohamed.boucadair@orange.com; Panwei (William) =
<william.panwei@huawei.com>
Subject: RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20


CAUTION: External email. Do not click links or open attachments unless =
you recognize the sender and know the content is safe.

  _____ =20

Hi Kaname,

=20

Unfortunately, implementing the (effectively white-list and black-list =
lists) DOTS ACLs in an upstream router to the DDoS Mitigator will kill =
off all traffic that does not match the ACLs =E2=80=93 unless there is a =
final hidden, implicit ACL that accepts all the remaining traffic.

=20

My tri-state issue perhaps comes more from the I-D DOTS Data Channel =
than this draft, but does still apply to this draft as it is defining =
what can be controlled by the Signal channel.

=20

Perhaps my concerns can be addressed instead by replacing in the I-D =
DOTS Data Channel (in 4.1)

=20

=E2=80=9CIf there is no match, then there is no action to be taken =
against the packet.=E2=80=9D

=20

With

=20

=E2=80=9CIf there is no match, then the packet will still be mitigated =
by the DOTS mitigator (how is out of scope) if a mitigation is =
active.=E2=80=9D

=20

Regards

=20

Jon

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of kaname nishizuka
Sent: 26 November 2018 08:33
To: Konda, Tirumaleswar Reddy; Jon Shallow; 'Panwei (William)'; =
dots@ietf.org; mohamed.boucadair@orange.com
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Jon,

Yes, I agree with Tiru.
I can hit upon an example that ACLs are implemented on a router in front =
of a mitigator.
In this case, keeping the model of ACLs to be same as the =
draft-ietf-netmod-acl-model will make deployment easier.

regards,
Kaname

On 2018/11/26 15:06, Konda, Tirumaleswar Reddy wrote:

Hi Jon,

=20

If the DOTS client believes the traffic from the accept-list sources =
will not attack its targets, it configures the accept-list filtering =
rules. The draft-nishizuka-dots-signal-control-filtering is  dealing =
with an attack scenario where the accept-list sources are either spoofed =
or compromised to attack the target.=20

=20

Irrespective of whether accept-list rules are configured or not, all =
incoming traffic will be scrubbed and the DOTS client will be notified =
if the accept-list sources are attacking target. It is then up to the =
DOTS client to make a call and de-activate the accept-list rules.=20

The DOTS client with DDoS detection capability can also identify and =
de-activate the accept-list rules during attack even without the =
conflict notification from the DOTS server.=20

=20

Since all traffic to the target will anyway be scrubbed during DDoS =
mitigation, I don=E2=80=99t see the need to configure a =
=E2=80=9Caccept+mitigate=E2=80=9D.  The =E2=80=9Cno action=E2=80=9D does =
not mean the traffic (not matching the filtering rules) will by-pass =
scrubbing by the DDoS mitigator.

=20

Cheers,

-Tiru

=20

From: Jon Shallow  <mailto:supjps-ietf@jpshallow.com> =
<supjps-ietf@jpshallow.com>=20
Sent: Friday, November 23, 2018 4:42 PM
To: 'Panwei (William)'  <mailto:william.panwei@huawei.com> =
<william.panwei@huawei.com>; dots@ietf.org; =
mohamed.boucadair@orange.com; Konda, Tirumaleswar Reddy  =
<mailto:TirumaleswarReddy_Konda@McAfee.com> =
<TirumaleswarReddy_Konda@McAfee.com>; 'kaname nishizuka'  =
<mailto:kaname@nttv6.jp> <kaname@nttv6.jp>
Subject: RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20


CAUTION: External email. Do not click links or open attachments unless =
you recognize the sender and know the content is safe.


  _____ =20


Hi There,

=20

This thread has flagged up to me that we are trying to represent a =
tri-state of actions (=E2=80=9Calways-drop=E2=80=9D, =
=E2=80=9Calways-let-through=E2=80=9D and =
=E2=80=9Clet-through-if-after-being-mitigated-it-is-allowed=E2=80=9D) =
with a duo-state of =E2=80=9Caccept-list=E2=80=9D and =
=E2=80=9Cdrop-list=E2=80=9D in the (Data Channel) ACLs.

=20

The traditional ACL is a set of match criteria and then an appropriate =
action if matched. =20

[As a separate note, picked up later, it has always been unclear in my =
mind over many years as to what happens if a packet does not trigger a =
match in any of the ACLs (falls off the end of the list).  What happens =
is usually defined by documentation of what actually happens in the =
underlying logic.  The Data Channel currently states =E2=80=9CIf there =
is no match, then there is no action to be taken against the =
packet.=E2=80=9D.]

The Data Channel only defines the DOTS forwarding actions as =
=E2=80=98accept=E2=80=99 or =E2=80=98drop=E2=80=99 with the addition of =
=E2=80=98rate-limit=E2=80=99 if =E2=80=98accept=E2=80=99 is defined.

It does state that, as an example, =E2=80=9CAccept-list management, =
which enables a DOTS client to inform a DOTS server about sources from =
which traffic should always be accepted=E2=80=9D which implies that =
=E2=80=98accept=E2=80=99 is the same as what we knew as white-list.  =
However, =E2=80=98accept=E2=80=99 means just that =E2=80=93 it is =
accepted at this point in the process.  Yes, it is effectively defined =
as a white list in the requirements document, but even though those =
working with the DOTS documents can get confused as they also are =
thinking about mitigate or mitigation [Is it accepted for mitigation, or =
is it unconditionally accepted?].

=20

We need the DOTS server to clearly understand the tri-state, and  cause =
(how is out of scope) traffic to be always accepted, always dropped or =
be analysed to see if it needs to be mitigated.

=20

In terms of moving forward, we could (in Data Channel) have an =
additional =E2=80=98leaf mitigate=E2=80=99 in =E2=80=98container =
actions=E2=80=99 which is only available when =E2=80=98accept=E2=80=99.  =
If true, traffic is passed to a mitigator (how out of scope), if false =
traffic is always passed through. (=E2=80=98leaf rate-limit=E2=80=99 is =
a special case of mitigation I guess.)

Alternatively, we could have actions of =E2=80=98accept=E2=80=99, =
=E2=80=98drop=E2=80=99 or =E2=80=98mitigate=E2=80=99.  =
=E2=80=98accept=E2=80=99 would then have the traditional meaning of pass =
=E2=80=93 effectively a white-list as previously intended, and =
=E2=80=98mitigate=E2=80=99 much clearer to the reader as to the intent.  =
Then we just need a definition for =E2=80=9CMitigate-List:=E2=80=9D.  I =
think =E2=80=98rate-limit=E2=80=99 would then have to only be associated =
with =E2=80=98mitigate=E2=80=99, not =E2=80=98accept=E2=80=99 as =
=E2=80=98accept=E2=80=99 is whitelist(no expected additional action).

=20

Using =E2=80=98accept=E2=80=99, =E2=80=98drop=E2=80=99 or =
=E2=80=98mitigate=E2=80=99 (or =E2=80=98accept + mitigate=E2=80=99, =
=E2=80=98accept + no-mitigate=E2=80=99 or =E2=80=98drop=E2=80=99 if =
going with the additional leaf suggestion) makes it much easier to =
directly instantiate these actions in the DOTS server environment.

=20

That then just leaves the question of what happens if there are no ACL =
matches (there could be no ACLs defined).  Do we go for an implied last =
ACL of all other traffic is to be mitigated if mitigating (Signal =
channel request), or do we take =E2=80=98no action=E2=80=99 as defined =
in the Data Channel?

=20

Regards

=20

Jon

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of Panwei (William)
Sent: 23 November 2018 08:25
To: Konda, Tirumaleswar Reddy; mohamed.boucadair@orange.com
Cc: dots@ietf.org; kaname nishizuka
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Tiru, Med,

=20

Thank you for explaining and reminding me. I just remembered that this =
terminology has already been described in the requirement draft.

Accept-list: A list of filters indicating sources from which traffic

should always be allowed, regardless of contradictory data gleaned

in a detected attack.

=20

Best Regards

Wei Pan

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: Konda, Tirumaleswar Reddy =
[mailto:TirumaleswarReddy_Konda@McAfee.com]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2018=E5=B9=B411=E6=9C=8823=E6=97=A5 16:07
=E6=94=B6=E4=BB=B6=E4=BA=BA: mohamed.boucadair@orange.com; Panwei =
(William) <william.panwei@huawei.com>; kaname nishizuka =
<kaname@nttv6.jp>
=E6=8A=84=E9=80=81: dots@ietf.org
=E4=B8=BB=E9=A2=98: RE: Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

If accept-listed sources are attacking the target, the DOTS server =
cannot turn-off the accept-list filtering rules without the consent from =
the DOTS client. DOTS server can inform the DOTS client of the conflict =
and/or the DOTS client with DDoS detection capability can identify the =
attack, and using the signal channel de-activate the accept-list =
filtering rules.

=20

=E2=80=9Caccept-list=E2=80=9D does not mean only the traffic matching =
the accept-list will be allowed to reach the target.=20

=20

Cheers,

-Tiru

=20

From: Dots <dots-bounces@ietf.org> On Behalf Of =
mohamed.boucadair@orange.com
Sent: Friday, November 23, 2018 12:04 PM
To: Panwei (William) <william.panwei@huawei.com>; kaname nishizuka =
<kaname@nttv6.jp>
Cc: dots@ietf.org
Subject: Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20


CAUTION: External email. Do not click links or open attachments unless =
you recognize the sender and know the content is safe.


  _____ =20


Hi Wei,=20

=20

Please see inline.

=20

Cheers,

Med

=20

De : Dots [mailto:dots-bounces@ietf.org] De la part de Panwei (William)
Envoy=C3=A9 : vendredi 23 novembre 2018 04:09
=C3=80 : kaname nishizuka
Cc : dots@ietf.org
Objet : [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering

=20

Hi Kaname,

=20

I have read your draft recently, and I have two suggestions about it.

1.      I=E2=80=99d like to suggest using =E2=80=9Cwhitelist=E2=80=9D or =
=E2=80=9CDDoS detection whitelist=E2=80=9D instead of =
=E2=80=9Caccept-list=E2=80=9D in the typical case.

=20

[Med] accept-list means white-list. accept-list is already used in DOTS =
requirements and data channel. The signal channel will make use of that =
term too. FWIW, that change is made because of what was reported by =
hrpc.=20

=20

A typical case is a DOTS client which configures during peace time

filtering rules using data channel to permit traffic from accept-

listed sources, but during the volumetric DDoS attack the DDoS

mitigator identifies the source addresses/prefixes in the accept-

listed filtering rules are attacking the target. For example, an

attacker can spoof the IP addresses of accept-listed sources to

generate attack traffic or the attacker can compromise the accept-

listed sources and program them to launch DDoS attack.

In this typical case, when you use =E2=80=9Caccept-list=E2=80=9D, it =
sounds like that only the traffic which match the accept-list can reach =
the target. I don=E2=80=99t know if you mean so, but if YES, I feel like =
the extension may not be essentially needed in such case. Because if a =
DDoS attack occurs in such situation, the attacker must have been =
included in the accept-list. The DOTS server can get this conclusion as =
the DOTS client can, so the DOTS server can de-activate the accept-list =
by its own without DOTS client=E2=80=99s request of filtering rules.=20

In my opinion, =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS detection =
whitelist=E2=80=9D is more suitable than  =E2=80=9Caccept-list=E2=80=9D. =
Because it indicates that the traffic which doesn=E2=80=99t match the =
DDoS whitelist can also reach the target, as long as it passes the =
detection. And if a DDoS attack happens, the DOTS server can=E2=80=99t =
know if the attacker is in the whitelist. If DOTS client find that the =
attacker is included in the DDoS whitelist, it must request the DOTS =
server to de-activate the whitelist.

=20

I=E2=80=99m not object to your case, I just want to make it clear and no =
misunderstanding.

=20

2. I=E2=80=99d like to suggest adding a guideline or suggestion about =
using signal channel to control filtering rules.

The purpose of using DOTS signal channel to control filtering rules is =
trying to help mitigate the DDoS attack when under attack time. This =
purpose should also be the guideline.=20

Requests which can help mitigate the attack should be send by the signal =
channel immediately. Requests which can=E2=80=99t help mitigate the =
attack should wait for the data channel to be re-established and then be =
sent by the data channel.

For example, during attack time, de-activating a drop-list (or =
blacklist) or activating a accept-list (or whitelist) may usually not =
help mitigate the DDoS attack. So If there is no necessary reason, these =
two requests should wait for using the data channel.

=20

[Med] Agree. We do have the following in -01:

=20

   A DOTS client relies on the information received from the DOTS server

   and/or local information to the DOTS client domain to trigger a

   filter control request.  Obviously, only filters that are pertinent

   for an ongoing mitigation should be controlled by a DOTS client using

   the DOTS signal channel.

=20

And

=20

   The DOTS client can also decide to send a PUT request to deactivate

   the "an-accept-list" ACL, if suspect traffic is received from an

   accept-listed source (2001:db8:1234::/48).  The structure of that PUT

   is the same as the one shown in Figure 4.

=20

=20

Best Regards

Wei Pan

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: Dots [mailto:dots-bounces@ietf.org] =
=E4=BB=A3=E8=A1=A8 kaname nishizuka
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2018=E5=B9=B411=E6=9C=8821=E6=97=A5 9:50
=E6=94=B6=E4=BB=B6=E4=BA=BA: dots@ietf.org
=E4=B8=BB=E9=A2=98: [Dots] Fwd: I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt

=20

Hi,

Base on the discussion of Bangkok interop: control data channel =
filtering via signal channel,
we've submitted the new draft for an extension to the DOTS signal =
channel to control the filtering rules during attack mitigation.

thanks,
Kaname Nishizuka



-------- Forwarded Message --------=20


Subject:=20

I-D Action: draft-nishizuka-dots-signal-control-filtering-00.txt


Date:=20

Tue, 20 Nov 2018 17:42:13 -0800


From:=20

internet-drafts@ietf.org


Reply-To:=20

internet-drafts@ietf.org


To:=20

i-d-announce@ietf.org

=20

A New Internet-Draft is available from the on-line Internet-Drafts =
directories.
=20
=20
        Title           : Controlling Filtering Rules Using DOTS Signal =
Channel
        Authors         : Kaname Nishizuka
                          Takahiko Nagata
                          Tirumaleswar Reddy
                          Mohamed Boucadair
    Filename        : =
draft-nishizuka-dots-signal-control-filtering-00.txt
    Pages           : 11
    Date            : 2018-11-20
=20
Abstract:
   This document specifies an extension to the DOTS signal channel to
   control the filtering rules during attack mitigation.
=20
   This extension allows a DOTS client to activate or de-activate
   filtering rules during a DDoS attack.  The characterization of these
   filters is supposed to be conveyed by a DOTS client during peace time
   by means of DOTS data channel.
=20
Editorial Note (To be removed by RFC Editor)
=20
   Please update these statements within the document with the RFC
   number to be assigned to this document:
=20
   o  "This version of this YANG module is part of RFC XXXX;"
=20
   o  "RFC XXXX: Controlling Filtering Rules Using DOTS Signal Channel";
=20
   o  reference: RFC XXXX
=20
   o  [RFCXXXX]
=20
   Please update these statements with the RFC number to be assigned to
   the following documents:
=20
   o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Signal Channel Specification" (used to be
      [I-D.ietf-dots-signal-channel])
=20
   o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Data Channel Specification" (used to be
      [I-D.ietf-dots-data-channel])
=20
   Please update the "revision" date of the YANG module.
=20
=20
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-control-filt=
ering/
=20
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-nishizuka-dots-signal-control-filtering=
-00
https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-signal-control=
-filtering-00
=20
=20
Please note that it may take a couple of minutes from the time of =
submission
until the htmlized version and diff are available at tools.ietf.org.
=20
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
=20
_______________________________________________
I-D-Announce mailing list
I-D-Announce@ietf.org
https://www.ietf..org/mailman/listinfo/i-d-announce =
<https://www.ietf.org/mailman/listinfo/i-d-announce>=20
Internet-Draft directories: http://www.ietf.org/shadow.html
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

=20


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</o:shapelayout></xml><![endif]--></head><body bgcolor=3Dwhite =
lang=3DEN-GB link=3Dblue vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Med,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Does (adding in the word further)<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>NEW:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If there is no match during peace time, then there is no =
<b>further</b> action to be taken against the packet. If there is no =
match during active mitigation, then the packet will still be scrubbed =
by the DDoS mitigator.</span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>work for you?<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: dots-bounces@ietf.org] <b>On Behalf Of =
</b>mohamed.boucadair@orange.com<br><b>Sent:</b> 26 November 2018 =
17:12<br><b>To:</b> Jon Shallow; dots@ietf.org; 'Konda, Tirumaleswar =
Reddy'; 'kaname nishizuka'; Panwei (William)<br><b>Subject:</b> Re: =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Re-,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>The new text applies for both immediate and =
activate-when-mitigate ACLs. <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>What do you think is missing in the proposed text?&nbsp; =
<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Thank you.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Cheers,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Med<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>De&nbsp;:</span></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Jon Shallow [mailto:supjps-ietf@jpshallow.com] =
<br><b>Envoy=C3=A9&nbsp;:</b> lundi 26 novembre 2018 =
18:03<br><b>=C3=80&nbsp;:</b> BOUCADAIR Mohamed TGI/OLN; dots@ietf.org; =
'Konda, Tirumaleswar Reddy'; 'kaname nishizuka'; Panwei =
(William)<br><b>Objet&nbsp;:</b> RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><span =
lang=3DFR><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Tiru / Med<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Does <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9CIf there is no match during peace time, then there is no =
action to be taken against the packet. If there is no match during =
active mitigation, then the packet will still be scrubbed by the DDoS =
mitigator.=E2=80=9D<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>cover the situation when one or more ACLs is =
=E2=80=9Cactivation-type=E2=80=9D :=3D =
=E2=80=9Cimmediate=E2=80=9D?<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>- ACLs are active, even if peace-time<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>- The statement does works for =E2=80=9Cactivation-type=E2=80=9D :=3D =
=E2=80=9Cactivate-when-mitigating=E2=80=9D<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I think we still need to better define what happens when there is not =
an ACL match.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: dots-bounces@ietf.org] <b>On Behalf Of =
</b>ietf-supjps-mohamed.boucadair@orange.com<br><b>Sent:</b> 26 November =
2018 13:14<br><b>To:</b> Konda, Tirumaleswar Reddy; Jon Shallow; 'kaname =
nishizuka'; dots@ietf.org; Panwei (William)<br><b>Subject:</b> Re: =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Re-,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Works for me.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Cheers,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Med<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>De&nbsp;:</span></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Konda, Tirumaleswar Reddy =
[mailto:TirumaleswarReddy_Konda@McAfee.com] =
<br><b>Envoy=C3=A9&nbsp;:</b> lundi 26 novembre 2018 =
13:42<br><b>=C3=80&nbsp;:</b> Jon Shallow; 'kaname nishizuka'; =
dots@ietf.org; BOUCADAIR Mohamed TGI/OLN; Panwei =
(William)<br><b>Objet&nbsp;:</b> RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><span =
lang=3DFR><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Hi Jon,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>We need both the lines.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>NEW:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If there is no match during peace time, then there is no action to be =
taken against the packet. If there is no match during active mitigation, =
then the packet will still be scrubbed by the DDoS =
mitigator.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Cheers,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>-Tiru</span><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'> Jon Shallow &lt;supjps-ietf@jpshallow.com&gt; <br><b>Sent:</b> =
Monday, November 26, 2018 3:55 PM<br><b>To:</b> 'kaname nishizuka' =
&lt;kaname@nttv6.jp&gt;; dots@ietf.org; Konda, Tirumaleswar Reddy =
&lt;TirumaleswarReddy_Konda@McAfee.com&gt;; =
mohamed.boucadair@orange.com; Panwei (William) =
&lt;william.panwei@huawei.com&gt;<br><b>Subject:</b> RE: [Dots] =
Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><table =
class=3DMsoNormalTable border=3D1 cellspacing=3D3 cellpadding=3D0 =
style=3D'background:#F3FF33;border:solid #9B9A87 1.5pt'><tr><td =
style=3D'border:none;padding:.75pt .75pt .75pt .75pt'><p><strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>CAUTION</span></=
strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>:</span><span =
style=3D'font-family:"Arial","sans-serif"'> External email. Do not click =
links or open attachments unless you recognize the sender and know the =
content is safe.<o:p></o:p></span></p></td></tr></table><div =
class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><hr size=3D2 width=3D"100%" align=3Dcenter></span></div></div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Kaname,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Unfortunately, implementing the (effectively white-list and =
black-list lists) DOTS ACLs in an upstream router to the DDoS Mitigator =
will kill off all traffic that does not match the ACLs =E2=80=93 unless =
there is a final hidden, implicit ACL that accepts all the remaining =
traffic.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>My tri-state issue perhaps comes more from the I-D DOTS Data Channel =
than this draft, but does still apply to this draft as it is defining =
what can be controlled by the Signal channel.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Perhaps my concerns can be addressed instead by replacing in the I-D =
DOTS Data Channel (in 4.1)<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9CIf there is no match, then there is no action to be taken =
against the packet.=E2=80=9D<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>With<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>=E2=80=9CIf there is no match, then the packet will still be =
mitigated by the DOTS mitigator (how is out of scope) if a mitigation is =
active.=E2=80=9D<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: <a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>] <b>On =
Behalf Of </b>kaname nishizuka<br><b>Sent:</b> 26 November 2018 =
08:33<br><b>To:</b> Konda, Tirumaleswar Reddy; Jon Shallow; 'Panwei =
(William)'; <a href=3D"mailto:dots@ietf.org">dots@ietf.org</a>; <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Subject:</b> Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering<o:p></o:p></span></p></div>=
</div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>Hi Jon,<br><br>Yes, I agree with =
Tiru.<br>I can hit upon an example that ACLs are implemented on a router =
in front of a mitigator.<br>In this case, keeping the model of ACLs to =
be same as the draft-ietf-netmod-acl-model will make deployment =
easier.<br><br>regards,<br>Kaname<o:p></o:p></p><div><p =
class=3DMsoNormal>On 2018/11/26 15:06, Konda, Tirumaleswar Reddy =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Hi Jon,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>If the DOTS client believes the traffic from the accept-list =
sources will not attack its targets, it configures the accept-list =
filtering rules. The draft-nishizuka-dots-signal-control-filtering is =
&nbsp;dealing with an attack scenario where the accept-list sources are =
either spoofed or compromised to attack the target. =
</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Irrespective of whether accept-list rules are configured or not, =
all incoming traffic will be scrubbed and the DOTS client will be =
notified if the accept-list sources are attacking target. It is then up =
to the DOTS client to make a call and de-activate the accept-list rules. =
</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>The DOTS client with DDoS detection capability can also identify =
and de-activate the accept-list rules during attack even without the =
conflict notification from the DOTS server. </span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Since all traffic to the target will anyway be scrubbed during =
DDoS mitigation, I don=E2=80=99t see the need to configure a =
=E2=80=9Caccept+mitigate=E2=80=9D. &nbsp;The =E2=80=9Cno action=E2=80=9D =
does not mean the traffic (not matching the filtering rules) will =
by-pass scrubbing by the DDoS mitigator.</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>-Tiru</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>From:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'> Jon Shallow <a =
href=3D"mailto:supjps-ietf@jpshallow.com">&lt;supjps-ietf@jpshallow.com&g=
t;</a> <br><b>Sent:</b> Friday, November 23, 2018 4:42 PM<br><b>To:</b> =
'Panwei (William)' <a =
href=3D"mailto:william.panwei@huawei.com">&lt;william.panwei@huawei.com&g=
t;</a>; <a href=3D"mailto:dots@ietf.org">dots@ietf.org</a>; <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a>; Konda, Tirumaleswar Reddy <a =
href=3D"mailto:TirumaleswarReddy_Konda@McAfee.com">&lt;TirumaleswarReddy_=
Konda@McAfee.com&gt;</a>; 'kaname nishizuka' <a =
href=3D"mailto:kaname@nttv6.jp">&lt;kaname@nttv6.jp&gt;</a><br><b>Subject=
:</b> RE: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><div><table =
class=3DMsoNormalTable border=3D1 cellspacing=3D3 cellpadding=3D0 =
style=3D'background:#F3FF33;border:solid #9B9A87 1.5pt'><tr><td =
style=3D'border:none;padding:.75pt .75pt .75pt .75pt'><p><strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>CAUTION</span></=
strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>:</span><span =
style=3D'font-family:"Arial","sans-serif"'> External email. Do not click =
links or open attachments unless you recognize the sender and know the =
content is safe.</span><o:p></o:p></p></td></tr></table><div =
class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><hr size=3D2 width=3D"100%" align=3Dcenter></span></div></div><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi There,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>This thread has flagged up to me that we are trying to represent a =
tri-state of actions (=E2=80=9Calways-drop=E2=80=9D, =
=E2=80=9Calways-let-through=E2=80=9D and =
=E2=80=9Clet-through-if-after-being-mitigated-it-is-allowed=E2=80=9D) =
with a duo-state of =E2=80=9Caccept-list=E2=80=9D and =
=E2=80=9Cdrop-list=E2=80=9D in the (Data Channel) =
ACLs.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The traditional ACL is a set of match criteria and then an =
appropriate action if matched.&nbsp; </span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>[As a separate note, picked up later, it has always been unclear in =
my mind over many years as to what happens if a packet does not trigger =
a match in any of the ACLs (falls off the end of the list). &nbsp;What =
happens is usually defined by documentation of what actually happens in =
the underlying logic.&nbsp; The Data Channel currently states =
=E2=80=9CIf there is <b>no match</b>, then there is <b>no action</b> to =
be taken against the packet.=E2=80=9D.]</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The Data Channel only defines the DOTS forwarding actions as =
=E2=80=98accept=E2=80=99 or =E2=80=98drop=E2=80=99 with the addition of =
=E2=80=98rate-limit=E2=80=99 if =E2=80=98accept=E2=80=99 is =
defined.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>It does state that, as an example, =E2=80=9CAccept-list management, =
which enables a DOTS client to inform a DOTS server about sources from =
which traffic should always be accepted=E2=80=9D which implies that =
=E2=80=98accept=E2=80=99 is the same as what we knew as =
white-list.&nbsp; However, =E2=80=98accept=E2=80=99 means just that =
=E2=80=93 it is accepted at this point in the process.&nbsp; Yes, it is =
effectively defined as a white list in the requirements document, but =
even though those working with the DOTS documents can get confused as =
they also are thinking about mitigate or mitigation [Is it accepted for =
mitigation, or is it unconditionally accepted?].</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>We need the DOTS server to clearly understand the tri-state, and =
&nbsp;cause (how is out of scope) traffic to be always accepted, always =
dropped or be analysed to see if it needs to be =
mitigated.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>In terms of moving forward, we could (in Data Channel) have an =
additional =E2=80=98leaf mitigate=E2=80=99 in =E2=80=98container =
actions=E2=80=99 which is only available when =
=E2=80=98accept=E2=80=99.&nbsp; If true, traffic is passed to a =
mitigator (how out of scope), if false traffic is always passed through. =
(=E2=80=98leaf rate-limit=E2=80=99 is a special case of mitigation I =
guess.)</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Alternatively, we could have actions of =E2=80=98accept=E2=80=99, =
=E2=80=98drop=E2=80=99 or =E2=80=98mitigate=E2=80=99.&nbsp; =
=E2=80=98accept=E2=80=99 would then have the traditional meaning of pass =
=E2=80=93 effectively a white-list as previously intended, and =
=E2=80=98mitigate=E2=80=99 much clearer to the reader as to the =
intent.&nbsp; Then we just need a definition for =
=E2=80=9CMitigate-List:=E2=80=9D.&nbsp; I think =
=E2=80=98rate-limit=E2=80=99 would then have to only be associated with =
=E2=80=98mitigate=E2=80=99, not =E2=80=98accept=E2=80=99 as =
=E2=80=98accept=E2=80=99 is whitelist(no expected additional =
action).</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Using =E2=80=98accept=E2=80=99, =E2=80=98drop=E2=80=99 or =
=E2=80=98mitigate=E2=80=99 (or =E2=80=98accept + mitigate=E2=80=99, =
=E2=80=98accept + no-mitigate=E2=80=99 or =E2=80=98drop=E2=80=99 if =
going with the additional leaf suggestion) makes it much easier to =
directly instantiate these actions in the DOTS server =
environment.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>That then just leaves the question of what happens if there are no =
ACL matches (there could be no ACLs defined).&nbsp; Do we go for an =
implied last ACL of all other traffic is to be mitigated if mitigating =
(Signal channel request), or do we take =E2=80=98no action=E2=80=99 as =
defined in the Data Channel?</span><o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Regards</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Jon</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><o:p></o:p></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [mailto: <a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>] <b>On =
Behalf Of </b>Panwei (William)<br><b>Sent:</b> 23 November 2018 =
08:25<br><b>To:</b> Konda, Tirumaleswar Reddy; <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Cc:</b> <a href=3D"mailto:dots@ietf.org">dots@ietf.org</a>; =
kaname nishizuka<br><b>Subject:</b> Re: [Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal>&nbsp;<o:p></o:p></p><p =
class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Hi Tiru, =
Med,</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Thank you =
for explaining and reminding me. I just remembered that this terminology =
has already been described in the requirement =
draft.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd;text-autospace:none'><span=
 =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>Accept-li=
st: A list of filters indicating sources from which =
traffic</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd;text-autospace:none'><span=
 style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>should =
always be allowed, regardless of contradictory data =
gleaned</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:24.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:2.0gd'><span =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>in a =
detected attack.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'text-align:justify'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Best =
Regards</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'text-align:justify'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Wei =
Pan</span><o:p></o:p></p></div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E4=BB=B6=E4=BA=BA</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
Konda, Tirumaleswar Reddy [<a =
href=3D"mailto:TirumaleswarReddy_Konda@McAfee.com">mailto:TirumaleswarRed=
dy_Konda@McAfee.com</a>] <br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
2018</span><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E5=B9=B4</span><span =
style=3D'font-size:11.0pt'>11</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=9C=88</span><span =
style=3D'font-size:11.0pt'>23</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=97=A5</span><span =
style=3D'font-size:11.0pt'> 16:07<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=94=B6=E4=BB=B6=E4=BA=BA</span></b=
><b><span style=3D'font-size:11.0pt'>:</span></b><span =
style=3D'font-size:11.0pt'> <a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a>; Panwei (William) &lt;<a =
href=3D"mailto:william.panwei@huawei.com">william.panwei@huawei.com</a>&g=
t;; kaname nishizuka &lt;<a =
href=3D"mailto:kaname@nttv6.jp">kaname@nttv6.jp</a>&gt;<br></span><b><spa=
n lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=8A=84=E9=80=81</span></b><b><span=
 style=3D'font-size:11.0pt'>:</span></b><span =
style=3D'font-size:11.0pt'> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br></span><b><span =
lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E4=B8=BB</span></b><b><span =
lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E9=A2=98</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
RE: Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'>&nbsp;<o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>If accept-listed sources are attacking the target, the DOTS server =
cannot turn-off the accept-list filtering rules without the consent from =
the DOTS client. DOTS server can inform the DOTS client of the conflict =
and/or the DOTS client with DDoS detection capability can identify the =
attack, and using the signal channel de-activate the accept-list =
filtering rules.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>=E2=80=9Caccept-list=E2=80=9D does not mean only the traffic =
matching the accept-list will be allowed to reach the target. =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>-Tiru</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'>From:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'> Dots &lt;<a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>&gt; =
<b>On Behalf Of </b><a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Sent:</b> Friday, November 23, 2018 12:04 PM<br><b>To:</b> =
Panwei (William) &lt;<a =
href=3D"mailto:william.panwei@huawei.com">william.panwei@huawei.com</a>&g=
t;; kaname nishizuka &lt;<a =
href=3D"mailto:kaname@nttv6.jp">kaname@nttv6.jp</a>&gt;<br><b>Cc:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Subject:</b> Re: =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'>&nbsp;<o:p></o:p></p><di=
v><table class=3DMsoNormalTable border=3D1 cellspacing=3D3 =
cellpadding=3D0 =
style=3D'margin-left:21.0pt;background:#F3FF33;border:solid #9B9A87 =
1.5pt'><tr><td style=3D'border:none;padding:.75pt .75pt .75pt =
.75pt'><p><strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>CAUTION</span></=
strong><span =
style=3D'font-family:"Arial","sans-serif";color:#9B8B3E'>:</span><span =
style=3D'font-family:"Arial","sans-serif"'> External email. Do not click =
links or open attachments unless you recognize the sender and know the =
content is safe.</span><o:p></o:p></p></td></tr></table><div =
style=3D'margin-bottom:3.6pt'><div =
style=3D'margin-left:21.0pt;margin-bottom:5.0pt'><div =
style=3D'margin-left:21.0pt'><div style=3D'margin-left:21.0pt'><div =
style=3D'margin-left:21.0pt'><div style=3D'margin-left:21.0pt'><div =
style=3D'margin-left:21.0pt'><div class=3DMsoNormal align=3Dcenter =
style=3D'margin-left:21.0pt;mso-para-margin-left:1.75gd;text-align:center=
'><span lang=3DFR =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:window=
text'><hr size=3D2 width=3D"100%" =
align=3Dcenter></span></div></div></div></div></div></div></div></div></d=
iv><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Hi Wei, =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Please see =
inline.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Cheers,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Med</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'>De&nbsp;:</span></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowt=
ext'> Dots [<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
<b>De la part de</b> Panwei (William)<br><b>Envoy=C3=A9&nbsp;:</b> =
vendredi 23 novembre 2018 04:09<br><b>=C3=80&nbsp;:</b> kaname =
nishizuka<br><b>Cc&nbsp;:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Objet&nbsp;:</b> =
[Dots] Suggestions about =
draft-nishizuka-dots-signal-control-filtering</span><o:p></o:p></p></div>=
</div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
lang=3DFR>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Hi =
Kaname,</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>I have =
read your draft recently, and I have two suggestions about =
it.</span><o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:93.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:6.25gd;text-indent:-18.0pt'><spa=
n =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>1.</span><s=
pan =
style=3D'font-size:7.0pt;color:windowtext'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
 </span><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>I=E2=80=99d=
 like to suggest using =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS =
detection whitelist=E2=80=9D instead of =E2=80=9Caccept-list=E2=80=9D in =
the typical case.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif"'>&nbsp;</span><o:p></o:p></p>=
<p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>[Med] =
accept-list means white-list. accept-list is already used in DOTS =
requirements and data channel. The signal channel will make use of that =
term too. FWIW, that change is made because of what was reported by =
hrpc. </span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>A =
typical case is a DOTS client which configures during peace =
time</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>filtering=
 rules using data channel to permit traffic from =
accept-</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>listed =
sources, but during the volumetric DDoS attack the =
DDoS</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>mitigator=
 identifies the source addresses/prefixes in the =
accept-</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>listed =
filtering rules are attacking the target. For example, =
an</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>attacker =
can spoof the IP addresses of accept-listed sources =
to</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd;text-autospace:none'><spa=
n =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>generate =
attack traffic or the attacker can compromise the =
accept-</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:45.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.75gd'><span =
style=3D'font-size:10.0pt;font-family:Courier;color:windowtext'>listed =
sources and program them to launch DDoS attack.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>In this =
typical case, when you use =E2=80=9Caccept-list=E2=80=9D, it sounds like =
that only the traffic which match the accept-list can reach the target. =
I don=E2=80=99t know if you mean so, but if YES, I feel like the =
extension may not be essentially needed in such case. Because if a DDoS =
attack occurs in such situation, the attacker must have been included in =
the accept-list. The DOTS server can get this conclusion as the DOTS =
client can, so the DOTS server can de-activate the accept-list by its =
own without DOTS client=E2=80=99s request of filtering rules. =
</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>In my =
opinion, =E2=80=9Cwhitelist=E2=80=9D or =E2=80=9CDDoS detection =
whitelist=E2=80=9D is more suitable than =
&nbsp;=E2=80=9Caccept-list=E2=80=9D. Because it indicates that the =
traffic which doesn=E2=80=99t match the DDoS whitelist can also reach =
the target, as long as it passes the detection. And if a DDoS attack =
happens, the DOTS server can=E2=80=99t know if the attacker is in the =
whitelist. If DOTS client find that the attacker is included in the DDoS =
whitelist, it must request the DOTS server to de-activate the =
whitelist.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>I=E2=80=99m=
 not object to your case, I just want to make it clear and no =
misunderstanding.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>2. =
I=E2=80=99d like to suggest adding a guideline or suggestion about using =
signal channel to control filtering rules.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>The =
purpose of using DOTS signal channel to control filtering rules is =
trying to help mitigate the DDoS attack when under attack time. This =
purpose should also be the guideline. </span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Requests =
which can help mitigate the attack should be send by the signal channel =
immediately. Requests which can=E2=80=99t help mitigate the attack =
should wait for the data channel to be re-established and then be sent =
by the data channel.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>For =
example, during attack time, de-activating a drop-list (or blacklist) or =
activating a accept-list (or whitelist) may usually not help mitigate =
the DDoS attack. So If there is no necessary reason, these two requests =
should wait for using the data channel.</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>[Med] =
Agree. We do have the following in -01:</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; A DOTS client relies on the =
information received from the DOTS server</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; and/or local information to the =
DOTS client domain to trigger a</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; filter control request.&nbsp; =
Obviously, only filters that are pertinent</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; for an ongoing mitigation should =
be controlled by a DOTS client using</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; </span><span lang=3DFR =
style=3D'font-size:10.0pt'>the DOTS signal =
channel.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>And</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; The DOTS client can also decide =
to send a PUT request to deactivate</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; the &quot;an-accept-list&quot; =
ACL, if suspect traffic is received from an</span><o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; accept-listed source =
(2001:db8:1234::/48).&nbsp; The structure of that =
PUT</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt'>&nbsp;&nbsp; is the same as the one shown in =
Figure 4.</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd;text-align:justify'><span=
 style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Best =
Regards</span><o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd;text-align:justify'><span=
 style=3D'font-family:"Calibri","sans-serif";color:windowtext'>Wei =
Pan</span><o:p></o:p></p></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:21.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:1.75gd'><span =
style=3D'font-family:"Calibri","sans-serif";color:windowtext'>&nbsp;</spa=
n><o:p></o:p></p><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E4=BB=B6=E4=BA=BA</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
Dots [<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
</span><b><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E4=BB=A3=E8=A1=A8</span></b><b><span=
 lang=3DZH-CN style=3D'font-size:11.0pt;mso-fareast-language:ZH-CN'> =
</span></b><span style=3D'font-size:11.0pt'>kaname =
nishizuka<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
2018</span><span lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E5=B9=B4</span><span =
style=3D'font-size:11.0pt'>11</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=9C=88</span><span =
style=3D'font-size:11.0pt'>21</span><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=97=A5</span><span =
style=3D'font-size:11.0pt'> 9:50<br></span><b><span lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E6=94=B6=E4=BB=B6=E4=BA=BA</span></b=
><b><span style=3D'font-size:11.0pt'>:</span></b><span =
style=3D'font-size:11.0pt'> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br></span><b><span =
lang=3DZH-CN style=3D'font-size:11.0pt;font-family:"MS =
Gothic";mso-fareast-language:ZH-CN'>=E4=B8=BB</span></b><b><span =
lang=3DZH-CN =
style=3D'font-size:11.0pt;font-family:MingLiU;mso-fareast-language:ZH-CN'=
>=E9=A2=98</span></b><b><span =
style=3D'font-size:11.0pt'>:</span></b><span style=3D'font-size:11.0pt'> =
[Dots] Fwd: I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt</span><o:p></o:p></p=
></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'>&nbsp;<o:p></o:p></p><div=
><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'>Hi,<br><br>Base on the =
discussion of Bangkok interop: control data channel filtering via signal =
channel,<br>we've submitted the new draft for an extension to the DOTS =
signal channel to control the filtering rules during attack =
mitigation.<br><br>thanks,<br>Kaname Nishizuka<br><br><br><br>-------- =
Forwarded Message -------- <o:p></o:p></p><table class=3DMsoNormalTable =
border=3D0 cellspacing=3D0 cellpadding=3D0 =
style=3D'margin-left:42.0pt'><tr><td nowrap valign=3Dtop =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>Subject: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal>I-D Action: =
draft-nishizuka-dots-signal-control-filtering-00.txt<o:p></o:p></p></td><=
/tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm 0cm 0cm 0cm'><p =
class=3DMsoNormal align=3Dright style=3D'text-align:right'><b>Date: =
</b><o:p></o:p></p></td><td style=3D'padding:0cm 0cm 0cm 0cm'><p =
class=3DMsoNormal>Tue, 20 Nov 2018 17:42:13 =
-0800<o:p></o:p></p></td></tr><tr><td nowrap valign=3Dtop =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>From: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal><a =
href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></p></td></tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm =
0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>Reply-To: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal><a =
href=3D"mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a><o:p=
></o:p></p></td></tr><tr><td nowrap valign=3Dtop style=3D'padding:0cm =
0cm 0cm 0cm'><p class=3DMsoNormal align=3Dright =
style=3D'text-align:right'><b>To: </b><o:p></o:p></p></td><td =
style=3D'padding:0cm 0cm 0cm 0cm'><p class=3DMsoNormal><a =
href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a><o:p></o:p=
></p></td></tr></table><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'>&nbsp;<o:p></o:p></p><pre=
 =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>A New =
Internet-Draft is available from the on-line Internet-Drafts =
directories.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Title&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
Controlling Filtering Rules Using DOTS Signal =
Channel</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Authors&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : Kaname =
Nishizuka</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; Takahiko Nagata</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; Tirumaleswar Reddy</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; Mohamed Boucadair</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp; =
Filename&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
draft-nishizuka-dots-signal-control-filtering-00.txt</span><o:p></o:p></p=
re><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp; =
Pages&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
11</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp; =
Date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : =
2018-11-20</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>Abstract:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; This document specifies an extension to the =
DOTS signal channel to</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; control the filtering rules during attack =
mitigation.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; This extension allows a DOTS client to =
activate or de-activate</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; filtering rules during a DDoS attack.&nbsp; =
The characterization of these</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; filters is supposed to be conveyed by a DOTS =
client during peace time</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; by means of DOTS data =
channel.</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier New","serif"'>Editorial =
Note (To be removed by RFC Editor)</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; Please update these statements within the =
document with the RFC</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; number to be assigned to this =
document:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;This version of this YANG =
module is part of RFC XXXX;&quot;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;RFC XXXX: Controlling Filtering =
Rules Using DOTS Signal Channel&quot;;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; reference: RFC =
XXXX</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; [RFCXXXX]</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; Please update these statements with the RFC =
number to be assigned to</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; the following =
documents:</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;RFC SSSS: Distributed =
Denial-of-Service Open Threat Signaling</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) Signal Channel =
Specification&quot; (used to be</span><o:p></o:p></pre><pre =
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margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
[I-D.ietf-dots-signal-channel])</span><o:p></o:p></pre><pre =
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in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; o&nbsp; &quot;RFC DDDD: Distributed =
Denial-of-Service Open Threat Signaling</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (DOTS) Data Channel =
Specification&quot; (used to be</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
[I-D.ietf-dots-data-channel])</span><o:p></o:p></pre><pre =
style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
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margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
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style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:3.6pt;marg=
in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
margin-bottom:3.6pt;mso-para-margin-left:3.5gd'><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New","serif"'>&nbsp;&nbsp; Please update the &quot;revision&quot; date =
of the YANG module.</span><o:p></o:p></pre><pre =
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in-left:42.0pt;mso-margin-top-alt:0cm;mso-para-margin-right:0cm;mso-para-=
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Date: Mon, 26 Nov 2018 16:14:46 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
To: Joe Touch <touch@strayalpha.com>
Cc: tsv-art <tsv-art@ietf.org>, draft-ietf-dots-requirements.all@ietf.org, ietf@ietf.org, dots@ietf.org
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Subject: Re: [Dots] [Tsv-art] Tsvart last call review of draft-ietf-dots-requirements-16
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Hi Joe,

Many of these points are at a point where the authors will need to weigh
in, but I can help a little bit more...

On Sun, Nov 25, 2018 at 09:08:39PM -0800, Joe Touch wrote:
> Hi, Benjamin,
> 
> > On Nov 25, 2018, at 1:17 PM, Benjamin Kaduk <kaduk@mit.edu> wrote:
> > 
> > Hi Joe,
> > 
> > On Sat, Nov 17, 2018 at 05:39:22PM -0800, Joseph Touch wrote:
> >> Reviewer: Joseph Touch
> >> Review result: Ready with Issues
> > 
> > [reformatted for readability]
> > 
> >> Transport issues:
> >> - The GEN requirements refer to signal and data channels; it should be more
> >> clear that these would be transport associations or connections, not
> >> necessarily separate port assignments
> >> 
> >> - GEN-03 recommends transports that avoid
> >> HOL blocking, but that blocking can occur at any protocol layer (e.g., when
> >> using TCP as a tunneling layer or at the application layer)
> > 
> > Is the concern about "conveyed over a transport not susceptible"?  I don't
> > think that one needs to read "transport" as "lowest level transport
> > protocol" here and it would equally apply to any tunneling layer.
> 
> The point is that avoiding HOL blocking at one layer may have no impact on HOL blocking at another layer. If HOL blocking is a significant problem, it needs to be noted that this can happen at many places in the stack, not just at the transport layer.

HoL blocking is a very big problem for the signal channel specifically, so
this is good feedback.

> > 
> >> - SIG-001 – PLPMTUD
> >> should be used instead of PMTUD; PMTUD (relying on ICMP, which is often blocked
> >> and remains insecure) should be avoided. The PMTU of 1280 is relevant only for
> >> IPv6. The use of 576 should be more clearly indicated as applying only to IPv4.
> >> (note there is emerging PLPMTUD for UDP).
> > 
> > The IPv4 text is phrased as it currently is since there may be tunneling
> > scenarios that go over IPv4 at some intermediate link even if the endpoints
> > are speaking IPv6.
> 
> That should be made more explicit.
> 
> > With respect to PMTU vs. PLPMTU, can you give any guidance on whether the
> > literl 1280 and 576 values are equally valid for assumed PLPMTU as for
> > "true" PMTU?
> 
> These are independent issues. The MTU minimums are set by the protocols; the MTU used on a given path is discovered by PMTUD or PLPMTUD; the former is not as reliable as the latter, due to ICMP blocking.

Maybe I am confused, but I have in mind a scenario where we PLPMTU
discovery fails so we assume 1280, but there's a tunneling protocol and
we traverse a minimum-MTU IPv6 segment, so our packet would be too big if
we assume PMTU of 1280 and don't know about the tunnel.  Can we do any
better than the existing assumptions from the IP minimum values?

> > 
> >> - SIG-004 should address the use of
> >> TCP keepalives for TCP connections as a way to achieve heartbeats.
> > 
> > I don't believe that there is an IETF consensus position about what layer
> > is best for performing heartbeats; see the "statement regarding keepalives"
> > thread.  
> 
> There’s a lot of misundestanding on this issue. Keepalives can be needed at multiple layers; a keep alive at one layer is never a direct substitute for a keep alive at another layer. If keepalives are enabled at multiple layers, they should never need to interfere, though - they basically disable keepalives at lower layer ONLY when they are frequent enough relative to that lower layer.
> 
> > In particular, since this signal channel is going to support
> > non-TCP transports and prefers UDP over TCP, it will need its own heartbeat
> > mechanism anyway, at which point the TCP-layer functionality is going to be
> > fairly redundant.
> 
> It depends on whether you also need TCP to keep active state. If so, turning TCP keepalives on would not necessarily interfere with app-layer keepalives; it would serve its own purpose.
> 
> Again, the error is thinking that keealives at one layer either avoid the need for keepalives at another layer OR interfere per se; correctly implemented, they do not interfere even when enabled at multiple layers.

I don't think that's the argument I was trying to make; I'm saying that
this is a generic requirements document and we are covering the application
layer's heartbeat needs.  If we don't require stable transport state (note
the lack of such a requirement in the SIG-XXX block), then why would we
need to talk about TCP hearbeats at all?

> > 
> >> - SIG-004 is
> >> self-contradictory, at first claiming that agents SHOULD avoid termination due
> >> to heartbeat loss then later saying they MAY use heartbeat absence as
> >> indication of defunct connections. Even though SHOULD and MAY can be used
> >> together this way, the advise is confusing. This is a case (see below) where
> >> the reasoning behind exceptions to SHOULDs are needed -- but the MAY clause is
> >> a far too trivial (and, based on our experience with BGP, incorrect) condition
> > 
> > Can you double-check this?  My read is that there are two factors involved
> > and we are only giving guidance on two quadrants of the truth table, with
> > the two factors being "failing to receive heartbeats" and "attack traffic
> > is present".  (The attack traffic is assumed to be swamping other traffic,
> > but when there is no attack traffic the heartbeats should be more
> > reliable.)
> 
> You need to explain these as a SINGLE recommendation. Putting contradictory advice in different places makes it confusing to determine how it is applied.

I'm still not seeing how these are contradictory.  We have "if A and not B,
do X" and "if not A and not B, do Y".  The predicates are different, so
where is the contradiction?

-Ben

> > 
> >> - DATA-002 should suggest protocols for security, at least indicating whether
> >> these need to be at a particular protocol layer (IP, transport, application),
> >> etc.
> > 
> > I think it's fine for a requirements document to limit itself to the actual
> > cryptographic requirements.
> 
> If you have something in mind that exists, say it. If not, then assume it will be incorrectly interpreted as suggesting something you didn’t have in mind.
> 
> IMO, better to avoid the ambiguity, i.e., to actually include the following to explain that TLS is sufficient:
> 
> >  FWIW, the current data-channel spec is using
> > TLS.
> > 
> > -Ben
> > 
> >> Other issues:
> >> - the document uses SHOULD without qualifying the conditions for exception
> >> 
> >> Nits
> >> - the abstract is too brief
> >> - Several requirements suggest that use of TCP avoids the need for separate
> >> congestion control; the same should be mentioned of SCTP and DCCP.
> >> 
> >> 
> > 
> > _______________________________________________
> > Tsv-art mailing list
> > Tsv-art@ietf.org
> > https://www.ietf.org/mailman/listinfo/tsv-art
> 


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Date: Mon, 26 Nov 2018 15:02:14 -0800
From: Joe Touch <touch@strayalpha.com>
To: Benjamin Kaduk <kaduk@mit.edu>
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Thanks for the input -- some suggestions below...

On 2018-11-26 14:14, Benjamin Kaduk wrote:

> Hi Joe,
> 
> Many of these points are at a point where the authors will need to weigh
> in, but I can help a little bit more...
> 
> On Sun, Nov 25, 2018 at 09:08:39PM -0800, Joe Touch wrote: Hi, Benjamin,
> 
> On Nov 25, 2018, at 1:17 PM, Benjamin Kaduk <kaduk@mit.edu> wrote:
> 
> Hi Joe,
> 
> On Sat, Nov 17, 2018 at 05:39:22PM -0800, Joseph Touch wrote: Reviewer: Joseph Touch
> Review result: Ready with Issues 
> [reformatted for readability]
> 
> Transport issues:
> - The GEN requirements refer to signal and data channels; it should be more
> clear that these would be transport associations or connections, not
> necessarily separate port assignments
> 
> - GEN-03 recommends transports that avoid
> HOL blocking, but that blocking can occur at any protocol layer (e.g., when
> using TCP as a tunneling layer or at the application layer) 
> Is the concern about "conveyed over a transport not susceptible"?  I don't
> think that one needs to read "transport" as "lowest level transport
> protocol" here and it would equally apply to any tunneling layer.

The point is that avoiding HOL blocking at one layer may have no impact
on HOL blocking at another layer. If HOL blocking is a significant
problem, it needs to be noted that this can happen at many places in the
stack, not just at the transport layer. 
HoL blocking is a very big problem for the signal channel specifically,
so
this is good feedback.

> - SIG-001 - PLPMTUD
> should be used instead of PMTUD; PMTUD (relying on ICMP, which is often blocked
> and remains insecure) should be avoided. The PMTU of 1280 is relevant only for
> IPv6. The use of 576 should be more clearly indicated as applying only to IPv4.
> (note there is emerging PLPMTUD for UDP). 
> The IPv4 text is phrased as it currently is since there may be tunneling
> scenarios that go over IPv4 at some intermediate link even if the endpoints
> are speaking IPv6.

That should be made more explicit.

> With respect to PMTU vs. PLPMTU, can you give any guidance on whether the
> literl 1280 and 576 values are equally valid for assumed PLPMTU as for
> "true" PMTU?

These are independent issues. The MTU minimums are set by the protocols;
the MTU used on a given path is discovered by PMTUD or PLPMTUD; the
former is not as reliable as the latter, due to ICMP blocking. 
Maybe I am confused, but I have in mind a scenario where we PLPMTU
discovery fails so we assume 1280, but there's a tunneling protocol and
we traverse a minimum-MTU IPv6 segment, so our packet would be too big
if
we assume PMTU of 1280 and don't know about the tunnel.  Can we do any
better than the existing assumptions from the IP minimum values? 

A tunnel that transits IP MUST be able to send 1280 bytes across it.
That may require fragmentation at the ingress and reassembly at the
egress -- which is why IPv6 link MTU is 1280 but the receiver reassembly
MTU is 1500. You cannot simply say that the tunnel eats the MTU and the
MTU is below 1280 - that's not allowed for IPv6. In this case, the
PLPMTUD between ingress and egress could report 1280 while the
end-to-end path that goes over the tunnel also reports 1280. 

This is explained in more detail in draft-ietf-intarea-tunnels 

> - SIG-004 should address the use of
> TCP keepalives for TCP connections as a way to achieve heartbeats. 
> I don't believe that there is an IETF consensus position about what layer
> is best for performing heartbeats; see the "statement regarding keepalives"
> thread.

There's a lot of misundestanding on this issue. Keepalives can be needed
at multiple layers; a keep alive at one layer is never a direct
substitute for a keep alive at another layer. If keepalives are enabled
at multiple layers, they should never need to interfere, though - they
basically disable keepalives at lower layer ONLY when they are frequent
enough relative to that lower layer.

> In particular, since this signal channel is going to support
> non-TCP transports and prefers UDP over TCP, it will need its own heartbeat
> mechanism anyway, at which point the TCP-layer functionality is going to be
> fairly redundant.

It depends on whether you also need TCP to keep active state. If so,
turning TCP keepalives on would not necessarily interfere with app-layer
keepalives; it would serve its own purpose.

Again, the error is thinking that keealives at one layer either avoid
the need for keepalives at another layer OR interfere per se; correctly
implemented, they do not interfere even when enabled at multiple layers.

I don't think that's the argument I was trying to make; I'm saying that
this is a generic requirements document and we are covering the
application
layer's heartbeat needs.  If we don't require stable transport state
(note
the lack of such a requirement in the SIG-XXX block), then why would we
need to talk about TCP hearbeats at all? 

An app layer can decide to use TCP as its heartbeat under some
circumstances, e.g., when it monitors the TCP state and uses it to
determine the application state. If that's never going to be sufficient,
they you should say so and explain why. 

> - SIG-004 is
> self-contradictory, at first claiming that agents SHOULD avoid termination due
> to heartbeat loss then later saying they MAY use heartbeat absence as
> indication of defunct connections. Even though SHOULD and MAY can be used
> together this way, the advise is confusing. This is a case (see below) where
> the reasoning behind exceptions to SHOULDs are needed -- but the MAY clause is
> a far too trivial (and, based on our experience with BGP, incorrect) condition 
> Can you double-check this?  My read is that there are two factors involved
> and we are only giving guidance on two quadrants of the truth table, with
> the two factors being "failing to receive heartbeats" and "attack traffic
> is present".  (The attack traffic is assumed to be swamping other traffic,
> but when there is no attack traffic the heartbeats should be more
> reliable.)

You need to explain these as a SINGLE recommendation. Putting
contradictory advice in different places makes it confusing to determine
how it is applied. 
I'm still not seeing how these are contradictory.  We have "if A and not
B,
do X" and "if not A and not B, do Y".  The predicates are different, so
where is the contradiction? 

SHOULD avoid termination due to the lack of heartbeats 
  - Implies that I can I terminate due to lack of heartbeats only in
some (exceptional) circumstances, 
    but doesn't say what those are 

MAY use heartbeat loss as indication of defunct connection 
  - Gives blanket permission to ignore the SHOULD above, without
consideration for circumstance 

Those are contradictory as phrased. They could be revised: 

SHOULD avoid termination... except possibly under circumstance X 
MAY terminate during circumstance X, but (we'd prefer not) OR (anytime
it wants) 

Joe 

> -Ben
> 
> - DATA-002 should suggest protocols for security, at least indicating whether
> these need to be at a particular protocol layer (IP, transport, application),
> etc. 
> I think it's fine for a requirements document to limit itself to the actual
> cryptographic requirements.

If you have something in mind that exists, say it. If not, then assume
it will be incorrectly interpreted as suggesting something you didn't
have in mind.

IMO, better to avoid the ambiguity, i.e., to actually include the
following to explain that TLS is sufficient:

> FWIW, the current data-channel spec is using
> TLS.
> 
> -Ben
> 
>> Other issues:
>> - the document uses SHOULD without qualifying the conditions for exception
>> 
>> Nits
>> - the abstract is too brief
>> - Several requirements suggest that use of TCP avoids the need for separate
>> congestion control; the same should be mentioned of SCTP and DCCP.
> 
> _______________________________________________
> Tsv-art mailing list
> Tsv-art@ietf.org
> https://www.ietf.org/mailman/listinfo/tsv-art
--=_50dc47a3dd2790ee100388482989f000
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset=UTF-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3DUTF-8" /></head><body style=3D'font-size: 10pt; font-family: Verdana,Gen=
eva,sans-serif'>
<p>Thanks for the input -- some suggestions below...</p>
<div>&nbsp;</div>
<p><br /></p>
<p>On 2018-11-26 14:14, Benjamin Kaduk wrote:</p>
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
Hi Joe,<br /><br /> Many of these points are at a point where the authors w=
ill need to weigh<br /> in, but I can help a little bit more...<br /><br />=
 On Sun, Nov 25, 2018 at 09:08:39PM -0800, Joe Touch wrote:
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">Hi, Benjamin,<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">On Nov 25, 2018, at 1:17 PM, Benjamin Kaduk &lt;<a hre=
f=3D"mailto:kaduk@mit.edu">kaduk@mit.edu</a>&gt; wrote:<br /><br /> Hi Joe,=
<br /><br /> On Sat, Nov 17, 2018 at 05:39:22PM -0800, Joseph Touch wrote:
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">Reviewer: Joseph Touch<br /> Review result: Ready with=
 Issues</blockquote>
<br /> [reformatted for readability]<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">Transport issues:<br /> - The GEN requirements refer t=
o signal and data channels; it should be more<br /> clear that these would =
be transport associations or connections, not<br /> necessarily separate po=
rt assignments<br /><br /> - GEN-03 recommends transports that avoid<br /> =
HOL blocking, but that blocking can occur at any protocol layer (e.g., when=
<br /> using TCP as a tunneling layer or at the application layer)</blockqu=
ote>
<br /> Is the concern about "conveyed over a transport not susceptible"? &n=
bsp;I don't<br /> think that one needs to read "transport" as "lowest level=
 transport<br /> protocol" here and it would equally apply to any tunneling=
 layer.</blockquote>
<br /> The point is that avoiding HOL blocking at one layer may have no imp=
act on HOL blocking at another layer. If HOL blocking is a significant prob=
lem, it needs to be noted that this can happen at many places in the stack,=
 not just at the transport layer.</blockquote>
<br /> HoL blocking is a very big problem for the signal channel specifical=
ly, so<br /> this is good feedback.<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0"><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">- SIG-001 &ndash; PLPMTUD<br /> should be used instead=
 of PMTUD; PMTUD (relying on ICMP, which is often blocked<br /> and remains=
 insecure) should be avoided. The PMTU of 1280 is relevant only for<br /> I=
Pv6. The use of 576 should be more clearly indicated as applying only to IP=
v4.<br /> (note there is emerging PLPMTUD for UDP).</blockquote>
<br /> The IPv4 text is phrased as it currently is since there may be tunne=
ling<br /> scenarios that go over IPv4 at some intermediate link even if th=
e endpoints<br /> are speaking IPv6.</blockquote>
<br /> That should be made more explicit.<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">With respect to PMTU vs. PLPMTU, can you give any guid=
ance on whether the<br /> literl 1280 and 576 values are equally valid for =
assumed PLPMTU as for<br /> "true" PMTU?</blockquote>
<br /> These are independent issues. The MTU minimums are set by the protoc=
ols; the MTU used on a given path is discovered by PMTUD or PLPMTUD; the fo=
rmer is not as reliable as the latter, due to ICMP blocking.</blockquote>
<br /> Maybe I am confused, but I have in mind a scenario where we PLPMTU<b=
r /> discovery fails so we assume 1280, but there's a tunneling protocol an=
d<br /> we traverse a minimum-MTU IPv6 segment, so our packet would be too =
big if<br /> we assume PMTU of 1280 and don't know about the tunnel. &nbsp;=
Can we do any<br /> better than the existing assumptions from the IP minimu=
m values?</div>
</blockquote>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
A tunnel that transits IP MUST be able to send 1280 bytes across it. That m=
ay require fragmentation at the ingress and reassembly at the egress -- whi=
ch is why IPv6 link MTU is 1280 but the receiver reassembly MTU is 1500. Yo=
u cannot simply say that the tunnel eats the MTU and the MTU is below 1280 =
- that's not allowed for IPv6.&nbsp;In this case, the PLPMTUD between ingre=
ss and egress could report 1280 while the end-to-end path that goes over th=
e tunnel also reports 1280.
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
This is explained in more detail in draft-ietf-intarea-tunnels</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0"><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">- SIG-004 should address the use of<br /> TCP keepaliv=
es for TCP connections as a way to achieve heartbeats.</blockquote>
<br /> I don't believe that there is an IETF consensus position about what =
layer<br /> is best for performing heartbeats; see the "statement regarding=
 keepalives"<br /> thread. &nbsp;</blockquote>
<br /> There's a lot of misundestanding on this issue. Keepalives can be ne=
eded at multiple layers; a keep alive at one layer is never a direct substi=
tute for a keep alive at another layer. If keepalives are enabled at multip=
le layers, they should never need to interfere, though - they basically dis=
able keepalives at lower layer ONLY when they are frequent enough relative =
to that lower layer.<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">In particular, since this signal channel is going to s=
upport<br /> non-TCP transports and prefers UDP over TCP, it will need its =
own heartbeat<br /> mechanism anyway, at which point the TCP-layer function=
ality is going to be<br /> fairly redundant.</blockquote>
<br /> It depends on whether you also need TCP to keep active state. If so,=
 turning TCP keepalives on would not necessarily interfere with app-layer k=
eepalives; it would serve its own purpose.<br /><br /> Again, the error is =
thinking that keealives at one layer either avoid the need for keepalives a=
t another layer OR interfere per se; correctly implemented, they do not int=
erfere even when enabled at multiple layers.</blockquote>
<br /> I don't think that's the argument I was trying to make; I'm saying t=
hat<br /> this is a generic requirements document and we are covering the a=
pplication<br /> layer's heartbeat needs. &nbsp;If we don't require stable =
transport state (note<br /> the lack of such a requirement in the SIG-XXX b=
lock), then why would we<br /> need to talk about TCP hearbeats at all?</di=
v>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
</blockquote>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
An app layer can decide to use TCP as its heartbeat under some circumstance=
s, e.g., when it monitors the TCP state and uses it to determine the applic=
ation state. If that's never going to be sufficient, they you should say so=
 and explain why.</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0"><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">- SIG-004 is<br /> self-contradictory, at first claimi=
ng that agents SHOULD avoid termination due<br /> to heartbeat loss then la=
ter saying they MAY use heartbeat absence as<br /> indication of defunct co=
nnections. Even though SHOULD and MAY can be used<br /> together this way, =
the advise is confusing. This is a case (see below) where<br /> the reasoni=
ng behind exceptions to SHOULDs are needed -- but the MAY clause is<br /> a=
 far too trivial (and, based on our experience with BGP, incorrect) conditi=
on</blockquote>
<br /> Can you double-check this? &nbsp;My read is that there are two facto=
rs involved<br /> and we are only giving guidance on two quadrants of the t=
ruth table, with<br /> the two factors being "failing to receive heartbeats=
" and "attack traffic<br /> is present". &nbsp;(The attack traffic is assum=
ed to be swamping other traffic,<br /> but when there is no attack traffic =
the heartbeats should be more<br /> reliable.)</blockquote>
<br /> You need to explain these as a SINGLE recommendation. Putting contra=
dictory advice in different places makes it confusing to determine how it i=
s applied.</blockquote>
<br /> I'm still not seeing how these are contradictory. &nbsp;We have "if =
A and not B,<br /> do X" and "if not A and not B, do Y". &nbsp;The predicat=
es are different, so<br /> where is the contradiction?</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
</blockquote>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
SHOULD avoid termination due to the lack of heartbeats</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp; - Implies that I can I terminate due to lack of heartbeats only in s=
ome (exceptional) circumstances,</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp; &nbsp; but doesn't say what those are</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
MAY use heartbeat loss as indication of defunct connection</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp; - Gives blanket permission to ignore the SHOULD above, without consi=
deration for circumstance</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
Those are contradictory as phrased. They could be revised:</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
SHOULD avoid termination... except possibly under circumstance X</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
MAY terminate during circumstance X, but (we'd prefer not) OR (anytime it w=
ants)</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
Joe</div>
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
&nbsp;</div>
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
<br /><br /> -Ben<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0"><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">- DATA-002 should suggest protocols for security, at l=
east indicating whether<br /> these need to be at a particular protocol lay=
er (IP, transport, application),<br /> etc.</blockquote>
<br /> I think it's fine for a requirements document to limit itself to the=
 actual<br /> cryptographic requirements.</blockquote>
<br /> If you have something in mind that exists, say it. If not, then assu=
me it will be incorrectly interpreted as suggesting something you didn't ha=
ve in mind.<br /><br /> IMO, better to avoid the ambiguity, i.e., to actual=
ly include the following to explain that TLS is sufficient:<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">&nbsp;FWIW, the current data-channel spec is using<br =
/> TLS.<br /><br /> -Ben<br /><br />
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">Other issues:<br /> - the document uses SHOULD without=
 qualifying the conditions for exception<br /><br /> Nits<br /> - the abstr=
act is too brief<br /> - Several requirements suggest that use of TCP avoid=
s the need for separate<br /> congestion control; the same should be mentio=
ned of SCTP and DCCP.<br /><br /><br /></blockquote>
<br /> _______________________________________________<br /> Tsv-art mailin=
g list<br /><a href=3D"mailto:Tsv-art@ietf.org">Tsv-art@ietf.org</a><br /><=
a href=3D"https://www.ietf.org/mailman/listinfo/tsv-art" target=3D"_blank" =
rel=3D"noopener noreferrer">https://www.ietf.org/mailman/listinfo/tsv-art</=
a></blockquote>
</blockquote>
</div>
</blockquote>
</body></html>

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From: <mohamed.boucadair@orange.com>
To: Jon Shallow <supjps-ietf@jpshallow.com>, "dots@ietf.org" <dots@ietf.org>,  "'Konda, Tirumaleswar Reddy'" <TirumaleswarReddy_Konda@mcafee.com>, "'kaname nishizuka'" <kaname@nttv6.jp>, "Panwei (William)" <william.panwei@huawei.com>
Thread-Topic: [Dots] Suggestions about draft-nishizuka-dots-signal-control-filtering
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Subject: [Dots] I-D Action: draft-ietf-dots-architecture-08.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

        Title           : Distributed-Denial-of-Service Open Threat Signaling (DOTS) Architecture
        Authors         : Andrew Mortensen
                          Flemming Andreasen
                          Tirumaleswar Reddy
                          Nik Teague
                          Rich Compton
                          Christopher Gray
	Filename        : draft-ietf-dots-architecture-08.txt
	Pages           : 33
	Date            : 2018-11-27

Abstract:
   This document describes an architecture for establishing and
   maintaining Distributed Denial of Service (DDoS) Open Threat
   Signaling (DOTS) within and between domains.  The document does not
   specify protocols or protocol extensions, instead focusing on
   defining architectural relationships, components and concepts used in
   a DOTS deployment.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-architecture/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-architecture-08
https://datatracker.ietf.org/doc/html/draft-ietf-dots-architecture-08

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dots-architecture-08


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Subject: [Dots] Fwd:  I-D Action: draft-ietf-dots-architecture-08.txt
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Hi all. This revision updates the discussion of the use of STUN as a mechan=
ism to resolve public mitigation scope. It also adds a discussion of using =
the Port Control Protocol (PCP) to resolve public mitigation scope.

andrew



Begin forwarded message:

From: <internet-drafts@ietf.org<mailto:internet-drafts@ietf.org>>
Subject: [Dots] I-D Action: draft-ietf-dots-architecture-08.txt
Date: November 27, 2018 at 10:42:38 AM EST
To: <i-d-announce@ietf.org<mailto:i-d-announce@ietf.org>>
Cc: <dots@ietf.org<mailto:dots@ietf.org>>
Reply-To: <dots@ietf.org<mailto:dots@ietf.org>>

[EXTERNAL EMAIL]


A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

       Title           : Distributed-Denial-of-Service Open Threat Signalin=
g (DOTS) Architecture
       Authors         : Andrew Mortensen
                         Flemming Andreasen
                         Tirumaleswar Reddy
                         Nik Teague
                         Rich Compton
                         Christopher Gray
Filename        : draft-ietf-dots-architecture-08.txt
Pages           : 33
Date            : 2018-11-27

Abstract:
  This document describes an architecture for establishing and
  maintaining Distributed Denial of Service (DDoS) Open Threat
  Signaling (DOTS) within and between domains.  The document does not
  specify protocols or protocol extensions, instead focusing on
  defining architectural relationships, components and concepts used in
  a DOTS deployment.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-architecture/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-architecture-08
https://datatracker.ietf.org/doc/html/draft-ietf-dots-architecture-08

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-dots-architecture-08


Please note that it may take a couple of minutes from the time of submissio=
n
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
Dots mailing list
Dots@ietf.org
https://www.ietf.org/mailman/listinfo/dots


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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space;" class=3D"">
Hi all. This revision updates the discussion of the use of STUN as a mechan=
ism to resolve public mitigation scope. It also adds a discussion of using =
the Port Control Protocol (PCP) to resolve public mitigation scope.
<div class=3D""><br class=3D"">
</div>
<div class=3D"">andrew</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<div><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">Begin forwarded message:</div>
<br class=3D"Apple-interchange-newline">
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
 sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">From:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D"">&lt;<a href=3D"mailto:internet-drafts@i=
etf.org" class=3D"">internet-drafts@ietf.org</a>&gt;<br class=3D"">
</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
 sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Subject:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D""><b class=3D"">[Dots] I-D Action: draft-=
ietf-dots-architecture-08.txt</b><br class=3D"">
</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
 sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Date:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D"">November 27, 2018 at 10:42:38 AM EST<br=
 class=3D"">
</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
 sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">To:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D"">&lt;<a href=3D"mailto:i-d-announce@ietf=
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</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
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</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
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</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
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ass=3D"">dots@ietf.org</a>&gt;<br class=3D"">
</span></div>
<br class=3D"">
<div class=3D"">
<div class=3D"">[EXTERNAL EMAIL]<br class=3D"">
<br class=3D"">
<br class=3D"">
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.<br class=3D"">
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.=
<br class=3D"">
<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Title &nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: Distributed-Denial-of-Service Open Threa=
t Signaling (DOTS) Architecture<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Authors &nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;: Andrew Mortensen<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Flemming Andreasen<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Tirumaleswar Reddy<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Nik Teague<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Rich Compton<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Christopher Gray<br class=3D"">
<span class=3D"Apple-tab-span" style=3D"white-space:pre"></span>Filename &n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: draft-ietf-dots-architecture-08.t=
xt<br class=3D"">
<span class=3D"Apple-tab-span" style=3D"white-space:pre"></span>Pages &nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: 33<br class=3D"">
<span class=3D"Apple-tab-span" style=3D"white-space:pre"></span>Date &nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: 2018-11-27<br=
 class=3D"">
<br class=3D"">
Abstract:<br class=3D"">
&nbsp;&nbsp;This document describes an architecture for establishing and<br=
 class=3D"">
&nbsp;&nbsp;maintaining Distributed Denial of Service (DDoS) Open Threat<br=
 class=3D"">
&nbsp;&nbsp;Signaling (DOTS) within and between domains. &nbsp;The document=
 does not<br class=3D"">
&nbsp;&nbsp;specify protocols or protocol extensions, instead focusing on<b=
r class=3D"">
&nbsp;&nbsp;defining architectural relationships, components and concepts u=
sed in<br class=3D"">
&nbsp;&nbsp;a DOTS deployment.<br class=3D"">
<br class=3D"">
<br class=3D"">
The IETF datatracker status page for this draft is:<br class=3D"">
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-dots-architecture/" =
class=3D"">https://datatracker.ietf.org/doc/draft-ietf-dots-architecture/</=
a><br class=3D"">
<br class=3D"">
There are also htmlized versions available at:<br class=3D"">
https://tools.ietf.org/html/draft-ietf-dots-architecture-08<br class=3D"">
https://datatracker.ietf.org/doc/html/draft-ietf-dots-architecture-08<br cl=
ass=3D"">
<br class=3D"">
A diff from the previous version is available at:<br class=3D"">
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-dots-architecture-08<br clas=
s=3D"">
<br class=3D"">
<br class=3D"">
Please note that it may take a couple of minutes from the time of submissio=
n<br class=3D"">
until the htmlized version and diff are available at tools.ietf.org.<br cla=
ss=3D"">
<br class=3D"">
Internet-Drafts are also available by anonymous FTP at:<br class=3D"">
ftp://ftp.ietf.org/internet-drafts/<br class=3D"">
<br class=3D"">
_______________________________________________<br class=3D"">
Dots mailing list<br class=3D"">
Dots@ietf.org<br class=3D"">
https://www.ietf.org/mailman/listinfo/dots<br class=3D"">
</div>
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</body>
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From nobody Tue Nov 27 14:15:15 2018
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From: Roman Danyliw <rdd@cert.org>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: WGLC on draft-ietf-dots-architecture-08
Thread-Index: AdSGnlgla3cLRB5MRLWQWFaJSQftBA==
Date: Tue, 27 Nov 2018 22:15:08 +0000
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Subject: [Dots] WGLC on draft-ietf-dots-architecture-08
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Hello!

Consistent with our discussion at the Bangkok meeting, we are starting a wo=
rking group last call (WGLC) for the DOTS architecture draft:

DOTS Architecture
draft-ietf-dots-architecture-08
https://tools.ietf.org/html/draft-ietf-dots-architecture-08

Please send comments to the DOTS mailing list -- feedback on remaining issu=
es or needed changes; as well as endorsements that this draft is ready.

This WGLC will end on December 12, 2018.

Thanks,
Roman and Frank


From nobody Tue Nov 27 17:50:49 2018
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From: "Panwei (William)" <william.panwei@huawei.com>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: WGLC on draft-ietf-dots-architecture-08
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<body lang=3D"ZH-CN" link=3D"#0563C1" vlink=3D"#954F72" style=3D"text-justi=
fy-trim:punctuation">
<div class=3D"WordSection1">
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;color:black">Hi,<o:p></o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;color:black"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;color:black">While &quot;drop-list&quo=
t; and &quot;accept-list&quot; are used in other drafts, I find that &quot;=
black-list&quot; and &quot;white-list&quot; are still used in the architect=
ure draft.
 Should the &quot;black-list&quot; and &quot;white-list&quot; be changed to=
 &quot;drop-list&quot; and &quot;accept-list&quot;?<o:p></o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;color:black"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;color:black">In Section 2:<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">o <b>Bl=
ack-list</b> management, which enables a DOTS client to inform the<o:p></o:=
p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">DOTS se=
rver about sources to suppress.<o:p></o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">o <b>Wh=
ite-list</b> management, which enables a DOTS client to inform the<o:p></o:=
p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">DOTS se=
rver about sources from which traffic is always accepted.<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;color:black">In Section 3.1.2:<o:p></o=
:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">Once th=
e DOTS client begins receiving DOTS server signals, the DOTS<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">session=
 is active. At any time during the DOTS session, the DOTS<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">client =
may use the data channel to manage aliases, manage
<b>black-</b> and<o:p></o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<b><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">whit=
e-listed</span></b><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-fami=
ly:Courier"> prefixes or addresses, leverage vendor-specific<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">extensi=
ons, and so on. Note that unlike the signal channel, there is<o:p></o:p></s=
pan></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">no requ=
irement that the data channel remains operational in attack<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">conditi=
ons (See Data Channel Requirements,<o:p></o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">[I-D.ie=
tf-dots-requirements]).<o:p></o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;color:black">In Section 4 :<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">Any att=
acker with the ability to impersonate a legitimate DOTS client<o:p></o:p></=
span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">or serv=
er or, indeed, inject false messages into the stream may<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">potenti=
ally trigger/withdraw traffic redirection, trigger/cancel<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" align=3D"left" style=3D"margin-left:21.0pt;mso-para-=
margin-left:2.0gd;text-align:left;text-autospace:none">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:Courier">mitigat=
ion activities or subvert
<b>black/whitelists</b>.<o:p></o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;color:black">Best Regards<o:p></o:p></=
span></p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US" style=3D"font-size:12.0pt;color:black">Wei Pan<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal" align=3D"left" style=3D"text-align:left"><span lang=
=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; -----</span><span style=
=3D"font-family:=CB=CE=CC=E5">=D3=CA=BC=FE=D4=AD=BC=FE</span><span lang=3D"=
EN-US">-----</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span><span style=3D"f=
ont-family:=CB=CE=CC=E5">=B7=A2=BC=FE=C8=CB</span><span lang=3D"EN-US">: Do=
ts [mailto:dots-bounces@ietf.org]
</span><span style=3D"font-family:=CB=CE=CC=E5">=B4=FA=B1=ED</span> <span l=
ang=3D"EN-US">Roman Danyliw</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span><span style=3D"f=
ont-family:=CB=CE=CC=E5">=B7=A2=CB=CD=CA=B1=BC=E4</span><span lang=3D"EN-US=
">: 2018</span><span style=3D"font-family:=CB=CE=CC=E5">=C4=EA</span><span =
lang=3D"EN-US">11</span><span style=3D"font-family:=CB=CE=CC=E5">=D4=C2</sp=
an><span lang=3D"EN-US">28</span><span style=3D"font-family:=CB=CE=CC=E5">=
=C8=D5</span><span lang=3D"EN-US">
 6:15</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span><span style=3D"f=
ont-family:=CB=CE=CC=E5">=CA=D5=BC=FE=C8=CB</span><span lang=3D"EN-US">: do=
ts@ietf.org</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span><span style=3D"f=
ont-family:=CB=CE=CC=E5">=D6=F7=CC=E2</span><span lang=3D"EN-US">: [Dots] W=
GLC on draft-ietf-dots-architecture-08</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; Hello!</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; Consistent with our dis=
cussion at the Bangkok meeting, we are starting a</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; working group last call=
 (WGLC) for the DOTS architecture draft:</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; DOTS Architecture</span=
></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; draft-ietf-dots-archite=
cture-08</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; <a href=3D"https://tool=
s.ietf.org/html/draft-ietf-dots-architecture-08">
<span style=3D"color:black;text-decoration:none">https://tools.ietf.org/htm=
l/draft-ietf-dots-architecture-08</span></a></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; Please send comments to=
 the DOTS mailing list -- feedback on remaining issues</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; or needed changes; as w=
ell as endorsements that this draft is ready.</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; This WGLC will end on D=
ecember 12, 2018.</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; Thanks,</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; Roman and Frank</span><=
/p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; </span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; _______________________=
________________________</span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; Dots mailing list</span=
></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; <a href=3D"mailto:Dots@=
ietf.org"><span style=3D"color:black;text-decoration:none">Dots@ietf.org</s=
pan></a></span></p>
<p class=3D"MsoPlainText"><span lang=3D"EN-US">&gt; <a href=3D"https://www.=
ietf.org/mailman/listinfo/dots">
<span style=3D"color:black;text-decoration:none">https://www.ietf.org/mailm=
an/listinfo/dots</span></a></span></p>
</div>
</body>
</html>

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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "Panwei (William)" <william.panwei@huawei.com>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: WGLC on draft-ietf-dots-architecture-08
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From nobody Wed Nov 28 08:09:04 2018
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Subject: [Dots] I-D Action: draft-ietf-dots-architecture-09.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

        Title           : Distributed-Denial-of-Service Open Threat Signaling (DOTS) Architecture
        Authors         : Andrew Mortensen
                          Flemming Andreasen
                          Tirumaleswar Reddy
                          Nik Teague
                          Rich Compton
                          Christopher Gray
	Filename        : draft-ietf-dots-architecture-09.txt
	Pages           : 33
	Date            : 2018-11-28

Abstract:
   This document describes an architecture for establishing and
   maintaining Distributed Denial of Service (DDoS) Open Threat
   Signaling (DOTS) within and between domains.  The document does not
   specify protocols or protocol extensions, instead focusing on
   defining architectural relationships, components and concepts used in
   a DOTS deployment.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-architecture/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-architecture-09
https://datatracker.ietf.org/doc/html/draft-ietf-dots-architecture-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dots-architecture-09


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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This revision uses the drop-/accept-list terminology in the requirements dr=
aft, emphasizes the lack of a standardized method to discover NAT behavior =
when using EDM, and adds RFC8174 language to the terminology section in acc=
ordance with BCP14.

andrew


Begin forwarded message:

From: <internet-drafts@ietf.org<mailto:internet-drafts@ietf.org>>
Subject: [Dots] I-D Action: draft-ietf-dots-architecture-09.txt
Date: November 28, 2018 at 11:09:02 AM EST
To: <i-d-announce@ietf.org<mailto:i-d-announce@ietf.org>>
Cc: <dots@ietf.org<mailto:dots@ietf.org>>
Reply-To: <dots@ietf.org<mailto:dots@ietf.org>>

[EXTERNAL EMAIL]


A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

       Title           : Distributed-Denial-of-Service Open Threat Signalin=
g (DOTS) Architecture
       Authors         : Andrew Mortensen
                         Flemming Andreasen
                         Tirumaleswar Reddy
                         Nik Teague
                         Rich Compton
                         Christopher Gray
Filename        : draft-ietf-dots-architecture-09.txt
Pages           : 33
Date            : 2018-11-28

Abstract:
  This document describes an architecture for establishing and
  maintaining Distributed Denial of Service (DDoS) Open Threat
  Signaling (DOTS) within and between domains.  The document does not
  specify protocols or protocol extensions, instead focusing on
  defining architectural relationships, components and concepts used in
  a DOTS deployment.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-architecture/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-architecture-09
https://datatracker.ietf.org/doc/html/draft-ietf-dots-architecture-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-dots-architecture-09


Please note that it may take a couple of minutes from the time of submissio=
n
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
Dots mailing list
Dots@ietf.org
https://www.ietf.org/mailman/listinfo/dots


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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space;" class=3D"">
This revision uses the drop-/accept-list terminology in the requirements dr=
aft, emphasizes the lack of a standardized method to discover NAT behavior =
when using EDM, and adds RFC8174 language to the terminology section in acc=
ordance with BCP14.
<div class=3D""><br class=3D"">
</div>
<div class=3D"">andrew</div>
<div class=3D""><br class=3D"">
<div><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">Begin forwarded message:</div>
<br class=3D"Apple-interchange-newline">
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
 sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">From:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D"">&lt;<a href=3D"mailto:internet-drafts@i=
etf.org" class=3D"">internet-drafts@ietf.org</a>&gt;<br class=3D"">
</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
 sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Subject:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D""><b class=3D"">[Dots] I-D Action: draft-=
ietf-dots-architecture-09.txt</b><br class=3D"">
</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
 sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Date:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D"">November 28, 2018 at 11:09:02 AM EST<br=
 class=3D"">
</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
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</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D"">&lt;<a href=3D"mailto:i-d-announce@ietf=
.org" class=3D"">i-d-announce@ietf.org</a>&gt;<br class=3D"">
</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
 sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Cc:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D"">&lt;<a href=3D"mailto:dots@ietf.org" cl=
ass=3D"">dots@ietf.org</a>&gt;<br class=3D"">
</span></div>
<div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margi=
n-left: 0px;" class=3D"">
<span style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica,=
 sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Reply-To:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D"">&lt;<a href=3D"mailto:dots@ietf.org" cl=
ass=3D"">dots@ietf.org</a>&gt;<br class=3D"">
</span></div>
<br class=3D"">
<div class=3D"">
<div class=3D"">[EXTERNAL EMAIL]<br class=3D"">
<br class=3D"">
<br class=3D"">
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.<br class=3D"">
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.=
<br class=3D"">
<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Title &nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: Distributed-Denial-of-Service Open Threa=
t Signaling (DOTS) Architecture<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Authors &nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;: Andrew Mortensen<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Flemming Andreasen<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Tirumaleswar Reddy<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Nik Teague<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Rich Compton<br class=3D"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
Christopher Gray<br class=3D"">
<span class=3D"Apple-tab-span" style=3D"white-space:pre"></span>Filename &n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: draft-ietf-dots-architecture-09.t=
xt<br class=3D"">
<span class=3D"Apple-tab-span" style=3D"white-space:pre"></span>Pages &nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: 33<br class=3D"">
<span class=3D"Apple-tab-span" style=3D"white-space:pre"></span>Date &nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;: 2018-11-28<br=
 class=3D"">
<br class=3D"">
Abstract:<br class=3D"">
&nbsp;&nbsp;This document describes an architecture for establishing and<br=
 class=3D"">
&nbsp;&nbsp;maintaining Distributed Denial of Service (DDoS) Open Threat<br=
 class=3D"">
&nbsp;&nbsp;Signaling (DOTS) within and between domains. &nbsp;The document=
 does not<br class=3D"">
&nbsp;&nbsp;specify protocols or protocol extensions, instead focusing on<b=
r class=3D"">
&nbsp;&nbsp;defining architectural relationships, components and concepts u=
sed in<br class=3D"">
&nbsp;&nbsp;a DOTS deployment.<br class=3D"">
<br class=3D"">
<br class=3D"">
The IETF datatracker status page for this draft is:<br class=3D"">
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-dots-architecture/" =
class=3D"">https://datatracker.ietf.org/doc/draft-ietf-dots-architecture/</=
a><br class=3D"">
<br class=3D"">
There are also htmlized versions available at:<br class=3D"">
https://tools.ietf.org/html/draft-ietf-dots-architecture-09<br class=3D"">
https://datatracker.ietf.org/doc/html/draft-ietf-dots-architecture-09<br cl=
ass=3D"">
<br class=3D"">
A diff from the previous version is available at:<br class=3D"">
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-dots-architecture-09<br clas=
s=3D"">
<br class=3D"">
<br class=3D"">
Please note that it may take a couple of minutes from the time of submissio=
n<br class=3D"">
until the htmlized version and diff are available at tools.ietf.org.<br cla=
ss=3D"">
<br class=3D"">
Internet-Drafts are also available by anonymous FTP at:<br class=3D"">
ftp://ftp.ietf.org/internet-drafts/<br class=3D"">
<br class=3D"">
_______________________________________________<br class=3D"">
Dots mailing list<br class=3D"">
Dots@ietf.org<br class=3D"">
https://www.ietf.org/mailman/listinfo/dots<br class=3D"">
</div>
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</body>
</html>

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Subject: [Dots] FYI: draft-moura-dnsop-authoritative-recommendations
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Hello WG,

Here's a draft that has just landed in dnsop that you may want to take a
look at.

https://datatracker.ietf.org/doc/draft-moura-dnsop-authoritative-recommenda=
tions/

It mentions DDoS in about half of the sections, and some (if not all) of
those could theoretically be addressed by DOTS functionality. Thus, DOTS
people may want to participate in discussion.

The draft is in the earliest stage of development, and, as a matter of
fact, is not ready for release, however, this is at the same time a right
moment to dive into the concerns dnsop WG currently has.

All in all, have fun!

--
T=C3=B6ma

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<div>Hello WG,</div><div><br></div><div>Here&#39;s a draft that has just la=
nded in dnsop that you may want to take a look at.</div><div><br></div><a h=
ref=3D"https://datatracker.ietf.org/doc/draft-moura-dnsop-authoritative-rec=
ommendations/">https://datatracker.ietf.org/doc/draft-moura-dnsop-authorita=
tive-recommendations/</a><div><br></div><div>It mentions DDoS in about half=
 of the sections, and some (if not all) of those could theoretically be add=
ressed by DOTS functionality. Thus, DOTS people may want to participate in =
discussion.</div><div><br></div><div>The draft is in the earliest stage of =
development, and, as a matter of fact, is not ready for release, however, t=
his is at the same time a right moment to dive into the concerns dnsop WG c=
urrently has.</div><div><br></div><div>All in all, have fun!</div><div><br>=
</div><div>--</div><div>T=C3=B6ma</div>

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To: Roman Danyliw <rdd@cert.org>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: WGLC on draft-ietf-dots-architecture-08
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Hi Roman, all,

I support this draft to be sent to the IESG for publication.=20

Some easy-to-fix comment, though:=20

(1) The document cites [I-D.ietf-dots-requirements] in may occurrences. I s=
uggest these citations to be more specific, that is to point the specific R=
EQ# or the section. Doing so would help readers not familiar with DOTS docu=
ments to easily link the various pieces.=20

(2) I used to point people to the DOTS architecture I-D when I receive comm=
ents/questions about the notion of "DOTS session" and to the Requirements I=
-D for clarification about DOTS channels. It seems that some clarifications=
 are needed in the architecture I-D to explain for readers not familiar wit=
h all DOTS documents, for example:=20
- the link with the underlying transport sessions/connections and security =
associations.=20
- mitigations are not bound to a DOTS session but to a DOTS client/domain.=
=20

(3) The signal channel I-D uses "DOTS signal channel session", "DOTS signal=
 channel sessions" and "DOTS data channel session" to refer to specific DOT=
S sessions. I'd like to have these terms introduced also in the arch I-D.=20

BTW, the signal channel uses in few occurrences "DOTS session"; those can b=
e changed to "DOTS signal channel session". There is no occurrence of "DOTS=
 session" in the data channel I-D.

Thank you. =20

Cheers,
Med

> -----Message d'origine-----
> De=A0: Dots [mailto:dots-bounces@ietf.org] De la part de Roman Danyliw
> Envoy=E9=A0: mardi 27 novembre 2018 23:15
> =C0=A0: dots@ietf.org
> Objet=A0: [Dots] WGLC on draft-ietf-dots-architecture-08
>=20
> Hello!
>=20
> Consistent with our discussion at the Bangkok meeting, we are starting a
> working group last call (WGLC) for the DOTS architecture draft:
>=20
> DOTS Architecture
> draft-ietf-dots-architecture-08
> https://tools.ietf.org/html/draft-ietf-dots-architecture-08
>=20
> Please send comments to the DOTS mailing list -- feedback on remaining is=
sues
> or needed changes; as well as endorsements that this draft is ready.
>=20
> This WGLC will end on December 12, 2018.
>=20
> Thanks,
> Roman and Frank
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Thu Nov 29 00:46:31 2018
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From: Yuhei Hayashi <hayashi.yuhei@lab.ntt.co.jp>
Message-ID: <60792ae9-9e70-bfda-cd2c-a1112c7dbb29@lab.ntt.co.jp>
Date: Thu, 29 Nov 2018 17:45:16 +0900
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Subject: [Dots] draft-h-dots-mitigation-offload-expansion-00: Reasons why we want to standardize between DMS and orchestrator using DOTS
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Hi Tiru, Flemming,

Thank you for asking question for my draft "draft-h-dots-mitigation-offload-expansion-00" in IETF103.

I'm sorry I'm late for answering the question.
These questions are similar so I will answer the question in this one thread.
> Q: (Tiru Reddy) Why the DMS must use DOTS to talk to the orchestrator?
> Q: (Flemming Andreasen) Is it worthwhile to standardize the communication between the DMS with the orchestrator? https://datatracker.ietf.org/meeting/103/materials/minutes-103-dots-00

We want to use various and latest DMS in DDoS Orchestration usecase because DDoS attacks evolve day by day.

However, syslog format varies from DMS to DMS.
There is no standardized IF or API between DMS and Orchestrator, so we have to develop IF module on orchestrator for adapting the DMS to the orchestrator.
I think it is obstacle to use various DMS in DDoS Orchestration usecase.

We are paying attention to DOTS, which is being debated the most as a standard for signaling related to DDoS.

Thanks,
Yuhei

-----------------------------------------
Nippon Telegraph and Telephone Corporation
  Network Service Systems Laboratories
   Transport Service Platform Innovation Project
    Transport Service Systems Development Project
     Yuhei Hayashi
0422-59-3485
hayashi.yuhei@lab.ntt.co.jp


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Subject: Re: [Dots] WGLC on draft-ietf-dots-architecture-08
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Roman Danyliw" <rdd@cert.org>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: WGLC on draft-ietf-dots-architecture-08
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Roman Danyliw" <rdd@cert.org>, "dots@ietf.org" <dots@ietf.org>
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From: "Xialiang (Frank, Network Integration Technology Research Dept)" <frank.xialiang@huawei.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Roman Danyliw <rdd@cert.org>, "dots@ietf.org" <dots@ietf.org>
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Roman Danyliw" <rdd@cert.org>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: WGLC on draft-ietf-dots-architecture-08
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From: <mohamed.boucadair@orange.com>
To: "Xialiang (Frank, Network Integration Technology Research Dept)" <frank.xialiang@huawei.com>, "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, Roman Danyliw <rdd@cert.org>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: WGLC on draft-ietf-dots-architecture-08
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Roman Danyliw" <rdd@cert.org>, "dots@ietf.org" <dots@ietf.org>
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
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Subject: Re: [Dots] WGLC on draft-ietf-dots-architecture-08
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Roman Danyliw" <rdd@cert.org>, "dots@ietf.org" <dots@ietf.org>
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
CC: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: WGLC on draft-ietf-dots-architecture-08
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Roman Danyliw" <rdd@cert.org>, "dots@ietf.org" <dots@ietf.org>
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From: Roman Danyliw <rdd@cert.org>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: Call for adoption on draft-boucadair-dots-server-discovery
Thread-Index: AdSI+mzom/yrMKu/SJm1ohZrl+sYtA==
Date: Fri, 30 Nov 2018 22:21:55 +0000
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Subject: [Dots] Call for adoption on draft-boucadair-dots-server-discovery
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Hello!

This is the start of a two week call for input on the WG adoption of the do=
cument:

draft-boucadair-dots-server-discovery
https://tools.ietf.org/html/draft-boucadair-dots-server-discovery-05

The document has been presented and discussed at IETF 103, IETF 100 and IET=
F 99;  and revisions have been made based on WG feedback.  Discussion of ad=
option of this draft was previously deferred pending submission of the sign=
al draft for publication (which occurred in September 2018).

At the IETF 103 meeting, there were not many participants who had read the =
draft.

Please provide feedback to the list/chairs if you believe that this documen=
t should be adopted as a WG document.  The adoption call will end on Decemb=
er 14 2018.

Regards,
Roman and Frank


From nobody Fri Nov 30 14:23:43 2018
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Subject: [Dots] The DOTS WG has placed draft-boucadair-dots-multihoming in state "Call For Adoption By WG Issued"
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The DOTS WG has placed draft-boucadair-dots-multihoming in state
Call For Adoption By WG Issued (entered by Roman Danyliw)

The document is available at
https://datatracker.ietf.org/doc/draft-boucadair-dots-multihoming/


From nobody Fri Nov 30 14:31:27 2018
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From: Roman Danyliw <rdd@cert.org>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: Call for adoption on draft-boucadair-dots-multihoming
Thread-Index: AdSI+VrxTDsjU4gnQ26nDTSSOWTM0w==
Date: Fri, 30 Nov 2018 22:31:20 +0000
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Hello!

This is the start of a two week call for input on the WG adoption of the do=
cument:

draft-boucadair-dots-multihoming
https://tools.ietf.org/html/draft-boucadair-dots-multihoming-04

The document has been presented and discussed at IETF 103, IETF 100 and IET=
F 99;  and revisions have been made based on WG feedback.  This document wa=
s created and deferred in the interest of simplifying the requirements and =
architecture drafts now getting ready for publication.

At the IETF 103 meeting, there were not many participants who had read the =
draft.

Please provide feedback to the list/chairs if you believe that this documen=
t should be adopted as a WG document.  The adoption call will end on Decemb=
er 14 2018.

Regards,
Roman and Frank

