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Subject: Re: [P2PSIP] Bootstrap redirection authentication [was Re: Fwd: I-D Action: draft-petithuguenin-p2psip-reload-one-to-many-00.txt]
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On 02/26/2013 09:50 AM, Marc Petit-Huguenin wrote:
> I did not release a new version of this draft because as I was working on 
> improving it I discovered some issues and I was not able to decide on the 
> right solution.  So I will present this in Orlando if I get presentation
> time, but I would like to start the discussion now.
> 
> The problem with Anycast is that there is no guarantee on the long term
> that the same physical endpoint will be reached when using such address.
> This is not a problem for short-term association, and even TCP is known to
> work fine in this case.  But in some cases (RELOAD section 3.2.1 second
> bullet) a client can establish a long-term association with a bootstrap
> server, and this association may fail.  So the solution used in
> -one-to-many-00 is to first send a STUN binding to the Anycast address
> which will be answered with a 300 redirect that contains a Unicast address
> that can be used for long term association.  This also works fine with
> multicast and broadcast.  No problem so far.
> 
> The problem is that it is relatively easy to redirect the client to the
> wrong IP address, which is why this kind of mechanism requires some form
> of authentication, so the client knows that the answer is from the real
> server. Note that the client will anyway quickly discover that the IP
> address does not use a correct certificate, so perhaps this attack is
> harmless.
> 
> One solution is to use the long-term authentication mechanism of STUN,
> using the same username and password that was used to acquire the RELOAD 
> certificate.  The client checks the MESSAGE-INTEGRITY in the response to 
> verify that the server really knows the password.  I do not really like
> this solution, because it requires to distribute and synchronize the 
> usernames/passwords on a lot of different servers.
> 
> Another solution may be to use the fact that the bootstrap servers are 
> contacted after a certificate is retrieved from the enrollment server 
> (although an implementation may want to query the real address in parallel)
> to establish a DTLS connection with the Anycast address, using this newly 
> acquired certificate, and then send the STUN Binding over it.  That's my 
> preferred solution, but that looks a little bit complex for that purpose 
> (although it does not add more code to an implementation, as DTLS is
> required for RELOAD anyway).

Reading the notes I took when trying to implement this, there is another issue
which is that DTLS was never defined as transport for STUN (or TURN).  So that
would require an additional draft.

- -- 
Marc Petit-Huguenin
Email: marc@petit-huguenin.org
Blog: http://blog.marc.petit-huguenin.org
Profile: http://www.linkedin.com/in/petithug
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From cjbc@it.uc3m.es  Wed Mar  6 01:35:01 2013
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From: Carlos =?ISO-8859-1?Q?Jes=FAs?= Bernardos Cano <cjbc@it.uc3m.es>
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Hi all,

The final agenda (we just did a minor update) is posted on the IETF
datatracker site.

Presenters: (if you have not done it already) please send your slides to
the chairs Sunday afternoon the latest.

Thanks!

Brian and Carlos

On Wed, 2013-02-27 at 19:45 +0100, Carlos Jesús Bernardos Cano wrote:
> Hi all,
> 
> You can find a first version of the agenda for Orlando at the end of
> this e-mail. Note that most updated version can always be found at:
> http://www.ietf.org/proceedings/86/agenda/agenda-86-p2psip
> 
> If we missed any request or assigned a wrong slot, please let us know.
> Note that the presentation slots may change by +-5 min or so.
> 
> -- Brian and Carlos
> 
> -------------------------------------------------------------------------
> Agenda of the P2PSIP WG meeting at IETF 86
> MONDAY, March 11, 2013
> 1540-1710  (Afternoon Session II), Caribbean 6 
> Conflicts: history, netconf, pce, oauth, tsvwg
> 
> -------------------------------------------------------------------------
> 
> 15:40 Administrativia ...........................................  5 min
>       B. Rosen, CJ. Bernardos
> 
> 15:45 WG Status Update .......................................... 20 min
>       B. Rosen, CJ. Bernardos
> 
> 16:05 A SIP Usage for RELOAD .................................... 10 min
>   o draft-ietf-p2psip-sip-09
>     * Presenter: Thomas C. Schmidt
> 
> 16:15 A Usage for Shared Resources in RELOAD (ShaRe) ............ 10 min
>   o draft-ietf-p2psip-share-01
>     * Presenter: Thomas C. Schmidt
> 
> 16:25 Configuration of Access Control Policy in RELOAD .......... 10 min
>   o draft-ietf-p2psip-access-control-00
>     * Presenter: Marc Petit-Huguenin
> 
> 16:35 Anycast, Multicast or Broadcast Bootstrap Nodes for RELOAD  15 min
>   o draft-petithuguenin-p2psip-reload-one-to-many-00
>     * Presenter: Marc Petit-Huguenin
> 
> 16:50 SCTP Overlay link for for RELOAD .......................... 10 min
>   o draft-petithuguenin-p2psip-reload-sctp-00
>     * Presenter: Marc Petit-Huguenin
> 
> 17:00 Anonymization for RELOAD ..................................  5 min
>   o draft-petithuguenin-p2psip-reload-anonymous-02
>     * Presenter: Marc Petit-Huguenin
> 
> 17:05 Next steps ................................................  5 min
>       B. Rosen, CJ. Bernardos
> 
> -------------------------------------------------------------------------
> 
> _______________________________________________
> P2PSIP mailing list
> P2PSIP@ietf.org
> https://www.ietf.org/mailman/listinfo/p2psip



From cjbc@it.uc3m.es  Mon Mar 11 07:07:05 2013
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Hi folks,

The materials are now available on the meetings material site. Thanks to
all presenters for providing the slides timely in advance:

https://datatracker.ietf.org/meeting/86/materials.html

For those here in Orlando, we would need a couple of minute takers and a
jabber scribe. If you can kindly volunteer in advance, that would be
highly appreciated.

Thanks!

-- Brian & Carlos


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From: "Roni Even" <ron.even.tlv@gmail.com>
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Date: Wed, 13 Mar 2013 14:45:42 +0200
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Cc: draft-ietf-p2psip-drr@tools.ietf.org, draft-ietf-p2psip-rpr@tools.ietf.org
Subject: Re: [P2PSIP] Review of DRR and RPR documents
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Hi Carlos,
You made a comment about registering the forward option flag and forward =
option type with IANA.
These parameters are defined in the p2psip base draft and flags values =
are assigned over there. So if there is a need for IANA registry this =
should be specified in the base draft which is the main document
Roni

-----Original Message-----
From: p2psip-bounces@ietf.org [mailto:p2psip-bounces@ietf.org] On Behalf =
Of Carlos Jes?s Bernardos Cano
Sent: 22 January, 2013 1:51 PM
To: p2psip@ietf.org
Cc: draft-ietf-p2psip-drr@tools.ietf.org; =
draft-ietf-p2psip-rpr@tools.ietf.org
Subject: [P2PSIP] Review of DRR and RPR documents

Hi,

As agreed during the last meeting, I've performed a review of =
draft-ietf-p2psip-drr and draft-ietf-p2psip-rpr documents, prior to =
shipping them to the IESG for publication. My reviews are attached to =
this e-mail (I added comments to the PDF version of each draft, hope =
this is fine).

I'd like authors to go through the comments before sending the documents =
to the IESG. There might be some issues that need to be brought to the =
WG for discussion.

I'd also like to ask the WG for opinion on one particular aspect. I'm =
wondering if it would be better to merge both documents into a single =
one. Currently, both documents make quite a lot of cross-references, but =
still there is duplicate text in both of them, so I'd be more in favor =
of merging (personal opinion). Please, comment on this on the mailing =
list.

Thanks,

Carlos


From cjbc@it.uc3m.es  Thu Mar 14 15:25:42 2013
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From: Carlos =?ISO-8859-1?Q?Jes=FAs?= Bernardos Cano <cjbc@it.uc3m.es>
To: P2PSIP WG <p2psip@ietf.org>
Date: Thu, 14 Mar 2013 23:25:37 +0100
Organization: Universidad Carlos III de Madrid
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Subject: [P2PSIP] Draft of meeting minutes uploaded
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Hi,

A draft of the minutes is available:

http://www.ietf.org/proceedings/86/minutes/minutes-86-p2psip

Many thanks Dean for providing the minutes.

Please provide your feedback by the end of next week.

Thanks,

Brian & Carlos





From internet-drafts@ietf.org  Sun Mar 24 23:05:03 2013
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Date: Sun, 24 Mar 2013 23:04:34 -0700
Cc: p2psip@ietf.org
Subject: [P2PSIP] I-D Action: draft-ietf-p2psip-diagnostics-11.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Peer-to-Peer Session Initiation Protocol =
Working Group of the IETF.

	Title           : P2P Overlay Diagnostics
	Author(s)       : Haibin Song
                          Jiang Xingfeng
                          Roni Even
                          David A. Bryan
	Filename        : draft-ietf-p2psip-diagnostics-11.txt
	Pages           : 30
	Date            : 2013-03-24

Abstract:
   This document describes mechanisms for P2P overlay diagnostics.  It
   defines extensions to the RELOAD P2PSIP base protocol RELOAD
   [I-D.ietf-p2psip-base] to collect diagnostic information, and details
   the protocol specifications for these extensions.  Useful diagnostic
   information for connection and node status monitoring is also
   defined.  The document also describes the usage scenarios and
   provides examples of how these methods are used to perform
   diagnostics in a P2PSIP overlay networks.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-p2psip-diagnostics

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-p2psip-diagnostics-11

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-diagnostics-11


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


From ron.even.tlv@gmail.com  Sat Mar 30 00:46:40 2013
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From: "Roni Even" <ron.even.tlv@gmail.com>
To: <cjbc@it.uc3m.es>, <p2psip@ietf.org>
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Cc: draft-ietf-p2psip-drr@tools.ietf.org, draft-ietf-p2psip-rpr@tools.ietf.org
Subject: Re: [P2PSIP] Review of DRR and RPR documents
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Hi Carlos,
The current text in the security section of both drafts is

"As a routing alternative, the security part of RPR conforms to section =
13.6 in based draft[I-D.ietf-p2psip-base] which describes routing =
security."

I saw you comment "I think this sections has to be extended. It is not =
clear to me how the proposed approach conforms to -base security without =
providing more details. How DoS attachs would be avoided for example, by =
trying to forge the destination address".

I am not sure what we can add here. The security section of the base =
draft starts with an overview that references RFC5765.  DRR and RPR are =
only adding  routing options.
DRR provides a direct path back to the source and as such reduce the =
problem on malicious nodes on the route to affect the route back. The =
digital signatures defined in the based draft protects against changes =
of the forwarding header.=20


RPR  as specified in the draft (section3.2) is using a trusted node =
close to the initiating node, using a trusted nodes is recommended as a =
security policy.  We can look at RPR as DRR in the direction toward the =
destination and since it is not an arbitrary node in the middle but one =
that should be trusted (managed network, bootstrap peers or configured =
relay) and using the based security recommendation will suffice.


We can try to add more text based on the above observation

for DRR

"As a routing alternative, the security part of DRR conforms to section =
13 with emphasis one section 13.6 in based draft[I-D.ietf-p2psip-base] =
which describes routing security. The DRR routing option provide the =
information about the route back to the source. According to section 13 =
of the base drat the forwarding header MUST be digitally signed =
protecting the DRR routing information."

For RPR
=20
"As a routing alternative, the security part of RPR conforms to section =
13 with emphasis one section 13.6 in based draft[I-D.ietf-p2psip-base] =
which describes routing security. RPR behave like a DRR requesting node =
towards the destination node. The RPR relay node is not an arbitrary =
node but should be a trusted one  (managed network, bootstrap peers or =
configured relay) which will make it less of a risk as outlined in =
section13 of the based draft."

Thanks
Roni Even


-----Original Message-----
From: p2psip-bounces@ietf.org [mailto:p2psip-bounces@ietf.org] On Behalf =
Of Carlos Jes?s Bernardos Cano
Sent: 22 January, 2013 1:51 PM
To: p2psip@ietf.org
Cc: draft-ietf-p2psip-drr@tools.ietf.org; =
draft-ietf-p2psip-rpr@tools.ietf.org
Subject: [P2PSIP] Review of DRR and RPR documents

Hi,

As agreed during the last meeting, I've performed a review of =
draft-ietf-p2psip-drr and draft-ietf-p2psip-rpr documents, prior to =
shipping them to the IESG for publication. My reviews are attached to =
this e-mail (I added comments to the PDF version of each draft, hope =
this is fine).

I'd like authors to go through the comments before sending the documents =
to the IESG. There might be some issues that need to be brought to the =
WG for discussion.

I'd also like to ask the WG for opinion on one particular aspect. I'm =
wondering if it would be better to merge both documents into a single =
one. Currently, both documents make quite a lot of cross-references, but =
still there is duplicate text in both of them, so I'd be more in favor =
of merging (personal opinion). Please, comment on this on the mailing =
list.

Thanks,

Carlos

