
From nobody Thu Oct  1 00:58:46 2015
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From: "Murray, Rob (Rob)" <rob.murray@alcatel-lucent.com>
To: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>, "draft-ietf-cdni-control-triggers@ietf.org" <draft-ietf-cdni-control-triggers@ietf.org>
Thread-Topic: [CDNi] Update on cdni-control-triggers
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Date: Thu, 1 Oct 2015 07:58:37 +0000
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Subject: Re: [CDNi] Update on cdni-control-triggers
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Ahh - there it is! Thanks for the poke Francois.

I'm not aware of any other open items, but will trawl emails and notes to
double-check.

I'll try to get it done soon... before the submission deadline anyway.


On 01/10/2015 07:25, "CDNi on behalf of Francois Le Faucheur (flefauch)"
<cdni-bounces@ietf.org on behalf of flefauch@cisco.com> wrote:

>Rob and co-authors,
>(I bet you saw this one coming)
>
>Do you have an estimated date for when you=B9ll publish a new rev of
>cdni-control-triggers?
>
>My understanding is that the only remaining open item is:
>    * alignment to the single CDNI media-type approach of
>draft-ietf-cdni-media-type.
>Are you aware of any other open items?
>
>For memory, as agreed in Prague, the plan of record is to submit the next
>version (addressing all the open items) to IESG review.
>
>Thank you
>
>Francois
>_______________________________________________
>CDNi mailing list
>CDNi@ietf.org
>https://www.ietf.org/mailman/listinfo/cdni


From nobody Thu Oct  1 05:58:05 2015
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From: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>
To: "Murray, Rob (Rob)" <rob.murray@alcatel-lucent.com>
Thread-Topic: [CDNi] Update on cdni-control-triggers
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Date: Thu, 1 Oct 2015 12:57:20 +0000
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Subject: Re: [CDNi] Update on cdni-control-triggers
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Great. Thanks.

> On 1 Oct 2015, at 09:58, Murray, Rob (Rob) <rob.murray@alcatel-lucent.com=
> wrote:
>=20
> Ahh - there it is! Thanks for the poke Francois.
>=20
> I'm not aware of any other open items, but will trawl emails and notes to
> double-check.
>=20
> I'll try to get it done soon... before the submission deadline anyway.
>=20
>=20
> On 01/10/2015 07:25, "CDNi on behalf of Francois Le Faucheur (flefauch)"
> <cdni-bounces@ietf.org on behalf of flefauch@cisco.com> wrote:
>=20
>> Rob and co-authors,
>> (I bet you saw this one coming)
>>=20
>> Do you have an estimated date for when you=B9ll publish a new rev of
>> cdni-control-triggers?
>>=20
>> My understanding is that the only remaining open item is:
>>   * alignment to the single CDNI media-type approach of
>> draft-ietf-cdni-media-type.
>> Are you aware of any other open items?
>>=20
>> For memory, as agreed in Prague, the plan of record is to submit the nex=
t
>> version (addressing all the open items) to IESG review.
>>=20
>> Thank you
>>=20
>> Francois
>> _______________________________________________
>> CDNi mailing list
>> CDNi@ietf.org
>> https://www.ietf.org/mailman/listinfo/cdni
>=20


From nobody Fri Oct  2 03:44:27 2015
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From: "Brandenburg, R. (Ray) van" <ray.vanbrandenburg@tno.nl>
To: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>
Thread-Topic: Update on draft-ietf-cdni-redirection-11.txt
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Date: Fri, 2 Oct 2015 10:44:17 +0000
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References: <20150720074520.10845.57328.idtracker@ietfa.amsl.com> <95FB9969-C61E-4520-A857-1A3858779B41@cisco.com> <2EED6D0C-D74C-40B9-8A35-A4F632AA249B@tno.nl> <A87D2177-6B23-49E9-95B9-D7AF56D599CC@cisco.com>
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From: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>
To: "Brandenburg, R. (Ray) van" <ray.vanbrandenburg@tno.nl>
Thread-Topic: Update on draft-ietf-cdni-redirection-11.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 Content Delivery Networks Interconnection Working Group of the IETF.

        Title           : CDNI Media Type Registration
        Author          : Kevin J. Ma
	Filename        : draft-ietf-cdni-media-type-04.txt
	Pages           : 6
	Date            : 2015-10-04

Abstract:
   This document defines the standard media type used by the Content
   Delivery Network Interconnection (CDNI) protocol suite, including the
   registration procedure and recommended usage of the required payload-
   type parameter .


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-media-type-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-media-type-04


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 Sun Oct  4 17:05:25 2015
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removed JSON qualifier to address Daryl's comment.

> -----Original Message-----
> From: CDNi [mailto:cdni-bounces@ietf.org] On Behalf Of internet-
> drafts@ietf.org
> Sent: Sunday, October 04, 2015 8:03 PM
> To: i-d-announce@ietf.org
> Cc: cdni@ietf.org
> Subject: [CDNi] I-D Action: draft-ietf-cdni-media-type-04.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>  This draft is a work item of the Content Delivery Networks
> Interconnection Working Group of the IETF.
>=20
>         Title           : CDNI Media Type Registration
>         Author          : Kevin J. Ma
> 	Filename        : draft-ietf-cdni-media-type-04.txt
> 	Pages           : 6
> 	Date            : 2015-10-04
>=20
> Abstract:
>    This document defines the standard media type used by the Content
>    Delivery Network Interconnection (CDNI) protocol suite, including the
>    registration procedure and recommended usage of the required payload-
>    type parameter .
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/
>=20
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-cdni-media-type-04
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-media-type-04
>=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
> _______________________________________________
> CDNi mailing list
> CDNi@ietf.org
> https://www.ietf.org/mailman/listinfo/cdni


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From: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>
To: "cdni@ietf.org" <cdni@ietf.org>
Thread-Topic: WG Last Call on draft-ietf-cdni-media-type-00.txt
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Hello,

This closes the Working Group Last Call on draft-ietf-cdni-media-type.

For information, this document is under IESG review.

Cheers

Francois

On 28 Sep 2015, at 14:51, Francois Le Faucheur <flefauch@cisco.com<mailto:f=
lefauch@cisco.com>> wrote:

Folks,

As agreed in Prague, we want to expedite the registration of a single Media=
 Type for all CDNI interfaces.

This starts a 1-week Working Group Last Call on draft-ietf-cdni-media-type-=
00.txt. It is a very short document.
Please send any comment to the list by 5 October end of the day.

Cheers

Francois & Daryl


Begin forwarded message:

From: <internet-drafts@ietf.org<mailto:internet-drafts@ietf.org>>
Subject: [CDNi] I-D Action: draft-ietf-cdni-media-type-00.txt
Date: 17 August 2015 23:25:00 CEST
To: <i-d-announce@ietf.org<mailto:i-d-announce@ietf.org>>
Cc: <cdni@ietf.org<mailto:cdni@ietf.org>>


A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
This draft is a work item of the Content Delivery Networks Interconnection =
Working Group of the IETF.

       Title           : CDNI Media Type Registration
       Author          : Kevin J. Ma
Filename        : draft-ietf-cdni-media-type-00.txt
Pages           : 6
Date            : 2015-08-17

Abstract:
  This document defines the standard media type used by the Content
  Delivery Network Interconnection (CDNI) protocol suite, including the
  registration procedure and recommended usage of the required payload-
  type parameter .



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-media-type-00


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/

_______________________________________________
CDNi mailing list
CDNi@ietf.org
https://www.ietf.org/mailman/listinfo/cdni



--_000_D3702BFF0CF04BFCAE7C3EE7F0B91C0Eciscocom_
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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"">
Hello,
<div class=3D""><br class=3D"">
</div>
<div class=3D"">This closes the Working Group Last Call on draft-ietf-cdni-=
media-type.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">For information, this document is under IESG review.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Cheers</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Francois</div>
<div class=3D""><br class=3D"">
<div>
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On 28 Sep 2015, at 14:51, Francois Le Faucheur &lt;<a href=
=3D"mailto:flefauch@cisco.com" class=3D"">flefauch@cisco.com</a>&gt; wrote:=
</div>
<br class=3D"Apple-interchange-newline">
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space;" class=3D"">
Folks,
<div class=3D""><br class=3D"">
</div>
<div class=3D"">As agreed in Prague, we want to expedite the registration o=
f a single Media Type for all CDNI interfaces.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">This starts a 1-week Working Group Last Call on&nbsp;draft-=
ietf-cdni-media-type-00.txt. It is a very short document.</div>
<div class=3D"">Please send any comment to the list by 5 October end of the=
 day.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Cheers</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Francois &amp; Daryl</div>
<div class=3D""><br class=3D"">
<div class=3D""><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', Helvetic=
a, sans-serif;" 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', Helvetic=
a, sans-serif;" 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"">[CDNi] I-D Action: draft-=
ietf-cdni-media-type-00.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', Helvetic=
a, sans-serif;" class=3D""><b class=3D"">Date:
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica Neue,=
 Helvetica, sans-serif;" class=3D"">17 August 2015 23:25:00 CEST<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', Helvetic=
a, sans-serif;" 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=
.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', Helvetic=
a, sans-serif;" 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:cdni@ietf.org" cl=
ass=3D"">cdni@ietf.org</a>&gt;<br class=3D"">
</span></div>
<br class=3D"">
<div 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 Content Delivery Networks Interconnection =
Working Group 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;: CDNI Media Type Registration<br class=3D=
"">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Author &nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;: Kevin J. Ma<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-cdni-media-type-00.txt=
<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;: 6<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;: 2015-08-17<br=
 class=3D"">
<br class=3D"">
Abstract:<br class=3D"">
&nbsp;&nbsp;This document defines the standard media type used by the Conte=
nt<br class=3D"">
&nbsp;&nbsp;Delivery Network Interconnection (CDNI) protocol suite, includi=
ng the<br class=3D"">
&nbsp;&nbsp;registration procedure and recommended usage of the required pa=
yload-<br class=3D"">
&nbsp;&nbsp;type parameter .<br class=3D"">
<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-cdni-media-type/" cl=
ass=3D"">https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/</a><b=
r class=3D"">
<br class=3D"">
There's also a htmlized version available at:<br class=3D"">
<a href=3D"https://tools.ietf.org/html/draft-ietf-cdni-media-type-00" class=
=3D"">https://tools.ietf.org/html/draft-ietf-cdni-media-type-00</a><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"">
CDNi mailing list<br class=3D"">
CDNi@ietf.org<br class=3D"">
https://www.ietf.org/mailman/listinfo/cdni<br class=3D"">
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</div>
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</body>
</html>

--_000_D3702BFF0CF04BFCAE7C3EE7F0B91C0Eciscocom_--


From nobody Wed Oct  7 01:52:25 2015
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Subject: [CDNi] I-D Action: draft-ietf-cdni-redirection-12.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 Content Delivery Networks Interconnection Working Group of the IETF.

        Title           : Request Routing Redirection Interface for CDN Interconnection
        Authors         : Ben Niven-Jenkins
                          Ray van Brandenburg
	Filename        : draft-ietf-cdni-redirection-12.txt
	Pages           : 30
	Date            : 2015-10-07

Abstract:
   The Request Routing Interface comprises of (1) the asynchronous
   advertisement of footprint and capabilities by a downstream Content
   Delivery Network (CDN) that allows an upstream CDN to decide whether
   to redirect particular user requests to that downstream CDN; and (2)
   the synchronous operation of an upstream CDN requesting whether a
   downstream CDN is prepared to accept a user request and of a
   downstream CDN responding with how to actually redirect the user
   request.  This document describes an interface for the latter part,
   i.e. the CDNI Request Routing Redirection interface.


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

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-redirection-12

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-redirection-12


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 Wed Oct  7 01:56:08 2015
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From: "Brandenburg, R. (Ray) van" <ray.vanbrandenburg@tno.nl>
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Thread-Topic: Update of draft-ietf-cdni-redirection
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From: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>
To: "Peterson, Jon <jon.peterson@neustar.biz> (jon.peterson@neustar.biz)" <jon.peterson@neustar.biz>, Ma Kevin <kevin.j.ma@ericsson.com>
Thread-Topic: [CDNi] Update of draft-ietf-cdni-redirection
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Date: Wed, 7 Oct 2015 12:04:18 +0000
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Subject: [CDNi] Fwd:  Update of draft-ietf-cdni-redirection
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From: Phil Sorber <sorber@apache.org>
Date: Wed, 07 Oct 2015 22:15:23 +0000
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Subject: Re: [CDNi] I-D Action: draft-ietf-cdni-redirection-12.txt
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There is a sentence in section 2 about HTTP redirection:

> Examples of an application level redirection are HTTP 302 Redirection and
RTMP 302 Redirection.

and then various other references to 302 redirection throughout the
document. My question is, what is the expectation for a multi-asset
exchange like segmented video where a UA is sent to a manifest and then
expected to download a series of video segments. Should the UA continually
go back to the redirector, or should it "stick" to the host it was
redirected to?

Perhaps this is out of the scope of this document?

On Wed, Oct 7, 2015 at 2:52 AM <internet-drafts@ietf.org> wrote:

>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>  This draft is a work item of the Content Delivery Networks
> Interconnection Working Group of the IETF.
>
>         Title           : Request Routing Redirection Interface for CDN
> Interconnection
>         Authors         : Ben Niven-Jenkins
>                           Ray van Brandenburg
>         Filename        : draft-ietf-cdni-redirection-12.txt
>         Pages           : 30
>         Date            : 2015-10-07
>
> Abstract:
>    The Request Routing Interface comprises of (1) the asynchronous
>    advertisement of footprint and capabilities by a downstream Content
>    Delivery Network (CDN) that allows an upstream CDN to decide whether
>    to redirect particular user requests to that downstream CDN; and (2)
>    the synchronous operation of an upstream CDN requesting whether a
>    downstream CDN is prepared to accept a user request and of a
>    downstream CDN responding with how to actually redirect the user
>    request.  This document describes an interface for the latter part,
>    i.e. the CDNI Request Routing Redirection interface.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-cdni-redirection/
>
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-cdni-redirection-12
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-redirection-12
>
>
> 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/
>
> _______________________________________________
> CDNi mailing list
> CDNi@ietf.org
> https://www.ietf.org/mailman/listinfo/cdni
>

--001a1140e786c27de005218b15a1
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<div dir=3D"ltr"><div>There is a sentence in section 2 about HTTP redirecti=
on:<br><br>&gt; Examples of an application level redirection are HTTP 302 R=
edirection and RTMP
 302 Redirection.<br><br>and then various other references to 302 redirecti=
on throughout the document. My question is, what is the expectation for a m=
ulti-asset exchange like segmented video where a UA is sent to a manifest a=
nd then expected to download a series of video segments. Should the UA cont=
inually go back to the redirector, or should it &quot;stick&quot; to the ho=
st it was redirected to?</div><div><br></div><div>Perhaps this is out of th=
e scope of this document?<br><br><div class=3D"gmail_quote"><div dir=3D"ltr=
">On Wed, Oct 7, 2015 at 2:52 AM &lt;<a href=3D"mailto:internet-drafts@ietf=
.org">internet-drafts@ietf.org</a>&gt; wrote:<br></div><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex"><br>
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.<br>
=C2=A0This draft is a work item of the Content Delivery Networks Interconne=
ction Working Group of the IETF.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 Request Routing Redirection Interface for CDN Interconnection<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Authors=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0: Ben =
Niven-Jenkins<br>
=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 Ray van Brandenburg<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-iet=
f-cdni-redirection-12.txt<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 30<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 :=
 2015-10-07<br>
<br>
Abstract:<br>
=C2=A0 =C2=A0The Request Routing Interface comprises of (1) the asynchronou=
s<br>
=C2=A0 =C2=A0advertisement of footprint and capabilities by a downstream Co=
ntent<br>
=C2=A0 =C2=A0Delivery Network (CDN) that allows an upstream CDN to decide w=
hether<br>
=C2=A0 =C2=A0to redirect particular user requests to that downstream CDN; a=
nd (2)<br>
=C2=A0 =C2=A0the synchronous operation of an upstream CDN requesting whethe=
r a<br>
=C2=A0 =C2=A0downstream CDN is prepared to accept a user request and of a<b=
r>
=C2=A0 =C2=A0downstream CDN responding with how to actually redirect the us=
er<br>
=C2=A0 =C2=A0request.=C2=A0 This document describes an interface for the la=
tter part,<br>
=C2=A0 =C2=A0i.e. the CDNI Request Routing Redirection interface.<br>
<br>
<br>
The IETF datatracker status page for this draft is:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-cdni-redirection/" r=
el=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/draft-=
ietf-cdni-redirection/</a><br>
<br>
There&#39;s also a htmlized version available at:<br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-cdni-redirection-12" rel=
=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-cd=
ni-redirection-12</a><br>
<br>
A diff from the previous version is available at:<br>
<a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-redirection-=
12" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdiff?url2=
=3Ddraft-ietf-cdni-redirection-12</a><br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
Internet-Drafts are also available by anonymous FTP at:<br>
<a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=3D"noreferrer" target=
=3D"_blank">ftp://ftp.ietf.org/internet-drafts/</a><br>
<br>
_______________________________________________<br>
CDNi mailing list<br>
<a href=3D"mailto:CDNi@ietf.org" target=3D"_blank">CDNi@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/cdni" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/cdni</a><br>
</blockquote></div></div></div>

--001a1140e786c27de005218b15a1--


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Subject: Re: [CDNi] I-D Action: draft-ietf-cdni-redirection-12.txt
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Hi Phil,

  Ray and Ben may have additional thoughts, but I think it depends (relativ=
e URL maybe reuse the redirect location vs. full URL reask the request rout=
er); either way, I think it's probably beyond the scope of the CDNI RI?

thanx!

--  Kevin J. Ma

Sent from my iPhone

On Oct 7, 2015, at 6:15 PM, Phil Sorber <sorber@apache.org<mailto:sorber@ap=
ache.org>> wrote:

There is a sentence in section 2 about HTTP redirection:

> Examples of an application level redirection are HTTP 302 Redirection and=
 RTMP 302 Redirection.

and then various other references to 302 redirection throughout the documen=
t. My question is, what is the expectation for a multi-asset exchange like =
segmented video where a UA is sent to a manifest and then expected to downl=
oad a series of video segments. Should the UA continually go back to the re=
director, or should it "stick" to the host it was redirected to?

Perhaps this is out of the scope of this document?

On Wed, Oct 7, 2015 at 2:52 AM <internet-drafts@ietf.org<mailto:internet-dr=
afts@ietf.org>> wrote:

A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Content Delivery Networks Interconnection=
 Working Group of the IETF.

        Title           : Request Routing Redirection Interface for CDN Int=
erconnection
        Authors         : Ben Niven-Jenkins
                          Ray van Brandenburg
        Filename        : draft-ietf-cdni-redirection-12.txt
        Pages           : 30
        Date            : 2015-10-07

Abstract:
   The Request Routing Interface comprises of (1) the asynchronous
   advertisement of footprint and capabilities by a downstream Content
   Delivery Network (CDN) that allows an upstream CDN to decide whether
   to redirect particular user requests to that downstream CDN; and (2)
   the synchronous operation of an upstream CDN requesting whether a
   downstream CDN is prepared to accept a user request and of a
   downstream CDN responding with how to actually redirect the user
   request.  This document describes an interface for the latter part,
   i.e. the CDNI Request Routing Redirection interface.


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

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-redirection-12

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-redirection-12


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<http://=
tools.ietf.org>.

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

_______________________________________________
CDNi mailing list
CDNi@ietf.org<mailto:CDNi@ietf.org>
https://www.ietf.org/mailman/listinfo/cdni
_______________________________________________
CDNi mailing list
CDNi@ietf.org<mailto:CDNi@ietf.org>
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<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body dir=3D"auto">
<div>Hi Phil,</div>
<div><br>
</div>
<div>&nbsp; Ray and Ben may have additional thoughts, but I think it depend=
s (relative URL maybe reuse the redirect location vs. full URL reask the re=
quest router); either way, I think it's probably beyond the scope of the CD=
NI RI?</div>
<div><br>
</div>
<div>thanx!</div>
<div><br>
</div>
<div>-- &nbsp;Kevin J. Ma<br>
<br>
Sent from my iPhone</div>
<div><br>
On Oct 7, 2015, at 6:15 PM, Phil Sorber &lt;<a href=3D"mailto:sorber@apache=
.org">sorber@apache.org</a>&gt; wrote:<br>
<br>
</div>
<blockquote type=3D"cite">
<div>
<div dir=3D"ltr">
<div>There is a sentence in section 2 about HTTP redirection:<br>
<br>
&gt; Examples of an application level redirection are HTTP 302 Redirection =
and RTMP 302 Redirection.<br>
<br>
and then various other references to 302 redirection throughout the documen=
t. My question is, what is the expectation for a multi-asset exchange like =
segmented video where a UA is sent to a manifest and then expected to downl=
oad a series of video segments.
 Should the UA continually go back to the redirector, or should it &quot;st=
ick&quot; to the host it was redirected to?</div>
<div><br>
</div>
<div>Perhaps this is out of the scope of this document?<br>
<br>
<div class=3D"gmail_quote">
<div dir=3D"ltr">On Wed, Oct 7, 2015 at 2:52 AM &lt;<a href=3D"mailto:inter=
net-drafts@ietf.org">internet-drafts@ietf.org</a>&gt; wrote:<br>
</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
<br>
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.<br>
&nbsp;This draft is a work item of the Content Delivery Networks Interconne=
ction Working Group of the IETF.<br>
<br>
&nbsp; &nbsp; &nbsp; &nbsp; Title&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;:=
 Request Routing Redirection Interface for CDN Interconnection<br>
&nbsp; &nbsp; &nbsp; &nbsp; Authors&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;: Ben =
Niven-Jenkins<br>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp=
; &nbsp; &nbsp; Ray van Brandenburg<br>
&nbsp; &nbsp; &nbsp; &nbsp; Filename&nbsp; &nbsp; &nbsp; &nbsp; : draft-iet=
f-cdni-redirection-12.txt<br>
&nbsp; &nbsp; &nbsp; &nbsp; Pages&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;:=
 30<br>
&nbsp; &nbsp; &nbsp; &nbsp; Date&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; :=
 2015-10-07<br>
<br>
Abstract:<br>
&nbsp; &nbsp;The Request Routing Interface comprises of (1) the asynchronou=
s<br>
&nbsp; &nbsp;advertisement of footprint and capabilities by a downstream Co=
ntent<br>
&nbsp; &nbsp;Delivery Network (CDN) that allows an upstream CDN to decide w=
hether<br>
&nbsp; &nbsp;to redirect particular user requests to that downstream CDN; a=
nd (2)<br>
&nbsp; &nbsp;the synchronous operation of an upstream CDN requesting whethe=
r a<br>
&nbsp; &nbsp;downstream CDN is prepared to accept a user request and of a<b=
r>
&nbsp; &nbsp;downstream CDN responding with how to actually redirect the us=
er<br>
&nbsp; &nbsp;request.&nbsp; This document describes an interface for the la=
tter part,<br>
&nbsp; &nbsp;i.e. the CDNI Request Routing Redirection interface.<br>
<br>
<br>
The IETF datatracker status page for this draft is:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-cdni-redirection/" r=
el=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/draft-=
ietf-cdni-redirection/</a><br>
<br>
There's also a htmlized version available at:<br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-cdni-redirection-12" rel=
=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-cd=
ni-redirection-12</a><br>
<br>
A diff from the previous version is available at:<br>
<a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-redirection-=
12" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdiff?url2=
=3Ddraft-ietf-cdni-redirection-12</a><br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">
tools.ietf.org</a>.<br>
<br>
Internet-Drafts are also available by anonymous FTP at:<br>
<a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=3D"noreferrer" target=
=3D"_blank">ftp://ftp.ietf.org/internet-drafts/</a><br>
<br>
_______________________________________________<br>
CDNi mailing list<br>
<a href=3D"mailto:CDNi@ietf.org" target=3D"_blank">CDNi@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/cdni" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/cdni</a><br>
</blockquote>
</div>
</div>
</div>
</div>
</blockquote>
<blockquote type=3D"cite">
<div><span>_______________________________________________</span><br>
<span>CDNi mailing list</span><br>
<span><a href=3D"mailto:CDNi@ietf.org">CDNi@ietf.org</a></span><br>
<span><a href=3D"https://www.ietf.org/mailman/listinfo/cdni">https://www.ie=
tf.org/mailman/listinfo/cdni</a></span><br>
</div>
</blockquote>
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From: Kevin Ma J <kevin.j.ma@ericsson.com>
To: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>, "Peterson, Jon <jon.peterson@neustar.biz> (jon.peterson@neustar.biz)" <jon.peterson@neustar.biz>
Thread-Topic: [CDNi] Update of draft-ietf-cdni-redirection
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From nobody Thu Oct  8 00:22:13 2015
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Hi Phil,

> On 7 Oct 2015, at 23:15, Phil Sorber <sorber@apache.org> wrote:
>=20
> There is a sentence in section 2 about HTTP redirection:
>=20
> > Examples of an application level redirection are HTTP 302 =
Redirection and RTMP 302 Redirection.
>=20
> and then various other references to 302 redirection throughout the =
document. My question is, what is the expectation for a multi-asset =
exchange like segmented video where a UA is sent to a manifest and then =
expected to download a series of video segments. Should the UA =
continually go back to the redirector, or should it "stick" to the host =
it was redirected to?

It depends on the type of reference. Sections 4 & 5 of RFC3986 cover =
this. =20

> Perhaps this is out of the scope of this document?

Yes it is IMO.

Ben

>=20
> On Wed, Oct 7, 2015 at 2:52 AM <internet-drafts@ietf.org =
<mailto:internet-drafts@ietf.org>> wrote:
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts =
directories.
>  This draft is a work item of the Content Delivery Networks =
Interconnection Working Group of the IETF.
>=20
>         Title           : Request Routing Redirection Interface for =
CDN Interconnection
>         Authors         : Ben Niven-Jenkins
>                           Ray van Brandenburg
>         Filename        : draft-ietf-cdni-redirection-12.txt
>         Pages           : 30
>         Date            : 2015-10-07
>=20
> Abstract:
>    The Request Routing Interface comprises of (1) the asynchronous
>    advertisement of footprint and capabilities by a downstream Content
>    Delivery Network (CDN) that allows an upstream CDN to decide =
whether
>    to redirect particular user requests to that downstream CDN; and =
(2)
>    the synchronous operation of an upstream CDN requesting whether a
>    downstream CDN is prepared to accept a user request and of a
>    downstream CDN responding with how to actually redirect the user
>    request.  This document describes an interface for the latter part,
>    i.e. the CDNI Request Routing Redirection interface.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-cdni-redirection/ =
<https://datatracker.ietf.org/doc/draft-ietf-cdni-redirection/>
>=20
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-cdni-redirection-12 =
<https://tools.ietf.org/html/draft-ietf-cdni-redirection-12>
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-redirection-12 =
<https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-redirection-12>
>=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 =
<http://tools.ietf.org/>.
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/ =
<ftp://ftp.ietf.org/internet-drafts/>
>=20
> _______________________________________________
> CDNi mailing list
> CDNi@ietf.org <mailto:CDNi@ietf.org>
> https://www.ietf.org/mailman/listinfo/cdni =
<https://www.ietf.org/mailman/listinfo/cdni>
> _______________________________________________
> CDNi mailing list
> CDNi@ietf.org
> https://www.ietf.org/mailman/listinfo/cdni


--Apple-Mail=_D6A135C0-B492-463C-84BF-CAEE4AB86C22
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	charset=us-ascii

<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-line-break: after-white-space;" =
class=3D"">Hi Phil,<div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On 7 Oct 2015, at 23:15, Phil =
Sorber &lt;<a href=3D"mailto:sorber@apache.org" =
class=3D"">sorber@apache.org</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div dir=3D"ltr" =
class=3D""><div class=3D"">There is a sentence in section 2 about HTTP =
redirection:<br class=3D""><br class=3D"">&gt; Examples of an =
application level redirection are HTTP 302 Redirection and RTMP
 302 Redirection.<br class=3D""><br class=3D"">and then various other =
references to 302 redirection throughout the document. My question is, =
what is the expectation for a multi-asset exchange like segmented video =
where a UA is sent to a manifest and then expected to download a series =
of video segments. Should the UA continually go back to the redirector, =
or should it "stick" to the host it was redirected =
to?</div></div></div></blockquote><div><br class=3D""></div>It depends =
on the type of reference. Sections 4 &amp; 5 of RFC3986 cover this. =
&nbsp;</div><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D""><div dir=3D"ltr" class=3D""><div class=3D"">Perhaps this is =
out of the scope of this document?<br =
class=3D""></div></div></div></blockquote><div><br class=3D""></div>Yes =
it is IMO.</div><div><br class=3D""></div><div>Ben</div><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""><div =
dir=3D"ltr" class=3D""><div class=3D""><br class=3D""><div =
class=3D"gmail_quote"><div dir=3D"ltr" class=3D"">On Wed, Oct 7, 2015 at =
2:52 AM &lt;<a href=3D"mailto:internet-drafts@ietf.org" =
class=3D"">internet-drafts@ietf.org</a>&gt; wrote:<br =
class=3D""></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><br class=3D"">
A New Internet-Draft is available from the on-line Internet-Drafts =
directories.<br class=3D"">
&nbsp;This draft is a work item of the Content Delivery Networks =
Interconnection Working Group of the IETF.<br class=3D"">
<br class=3D"">
&nbsp; &nbsp; &nbsp; &nbsp; Title&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;: Request Routing Redirection Interface for CDN Interconnection<br =
class=3D"">
&nbsp; &nbsp; &nbsp; &nbsp; Authors&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;: =
Ben Niven-Jenkins<br class=3D"">
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp; &nbsp; &nbsp; Ray van Brandenburg<br class=3D"">
&nbsp; &nbsp; &nbsp; &nbsp; Filename&nbsp; &nbsp; &nbsp; &nbsp; : =
draft-ietf-cdni-redirection-12.txt<br class=3D"">
&nbsp; &nbsp; &nbsp; &nbsp; Pages&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;: 30<br class=3D"">
&nbsp; &nbsp; &nbsp; &nbsp; Date&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp; : 2015-10-07<br class=3D"">
<br class=3D"">
Abstract:<br class=3D"">
&nbsp; &nbsp;The Request Routing Interface comprises of (1) the =
asynchronous<br class=3D"">
&nbsp; &nbsp;advertisement of footprint and capabilities by a downstream =
Content<br class=3D"">
&nbsp; &nbsp;Delivery Network (CDN) that allows an upstream CDN to =
decide whether<br class=3D"">
&nbsp; &nbsp;to redirect particular user requests to that downstream =
CDN; and (2)<br class=3D"">
&nbsp; &nbsp;the synchronous operation of an upstream CDN requesting =
whether a<br class=3D"">
&nbsp; &nbsp;downstream CDN is prepared to accept a user request and of =
a<br class=3D"">
&nbsp; &nbsp;downstream CDN responding with how to actually redirect the =
user<br class=3D"">
&nbsp; &nbsp;request.&nbsp; This document describes an interface for the =
latter part,<br class=3D"">
&nbsp; &nbsp;i.e. the CDNI Request Routing Redirection interface.<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-cdni-redirection/" =
rel=3D"noreferrer" target=3D"_blank" =
class=3D"">https://datatracker.ietf.org/doc/draft-ietf-cdni-redirection/</=
a><br class=3D"">
<br class=3D"">
There's also a htmlized version available at:<br class=3D"">
<a href=3D"https://tools.ietf.org/html/draft-ietf-cdni-redirection-12" =
rel=3D"noreferrer" target=3D"_blank" =
class=3D"">https://tools.ietf.org/html/draft-ietf-cdni-redirection-12</a><=
br class=3D"">
<br class=3D"">
A diff from the previous version is available at:<br class=3D"">
<a =
href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-redirection-12=
" rel=3D"noreferrer" target=3D"_blank" =
class=3D"">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-redirection=
-12</a><br class=3D"">
<br class=3D"">
<br class=3D"">
Please note that it may take a couple of minutes from the time of =
submission<br class=3D"">
until the htmlized version and diff are available at <a =
href=3D"http://tools.ietf.org/" rel=3D"noreferrer" target=3D"_blank" =
class=3D"">tools.ietf.org</a>.<br class=3D"">
<br class=3D"">
Internet-Drafts are also available by anonymous FTP at:<br class=3D"">
<a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=3D"noreferrer" =
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Thread-Topic: [CDNi] Update of draft-ietf-cdni-redirection
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From: Phil Sorber <sorber@apache.org>
Date: Thu, 08 Oct 2015 17:52:28 +0000
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To: Ben Niven-Jenkins <ben@niven-jenkins.co.uk>
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Subject: Re: [CDNi] I-D Action: draft-ietf-cdni-redirection-12.txt
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Just for clarity, I found what I was looking for in
https://tools.ietf.org/html/rfc6983#section-2.2.1 (which is an anagram of
RFC3986). It's really defined as a player behavior, but as far as I can
tell there is currently no way to signal the client player to act in a
specific way so I guess there is no point in signaling this between the
uCDN and dCDN.

Thanks.

On Thu, Oct 8, 2015 at 1:22 AM Ben Niven-Jenkins <ben@niven-jenkins.co.uk>
wrote:

> Hi Phil,
>
> On 7 Oct 2015, at 23:15, Phil Sorber <sorber@apache.org> wrote:
>
> There is a sentence in section 2 about HTTP redirection:
>
> > Examples of an application level redirection are HTTP 302 Redirection
> and RTMP 302 Redirection.
>
> and then various other references to 302 redirection throughout the
> document. My question is, what is the expectation for a multi-asset
> exchange like segmented video where a UA is sent to a manifest and then
> expected to download a series of video segments. Should the UA continually
> go back to the redirector, or should it "stick" to the host it was
> redirected to?
>
>
> It depends on the type of reference. Sections 4 & 5 of RFC3986 cover this.
>
>
> Perhaps this is out of the scope of this document?
>
>
> Yes it is IMO.
>
> Ben
>
>
> On Wed, Oct 7, 2015 at 2:52 AM <internet-drafts@ietf.org> wrote:
>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>>  This draft is a work item of the Content Delivery Networks
>> Interconnection Working Group of the IETF.
>>
>>         Title           : Request Routing Redirection Interface for CDN
>> Interconnection
>>         Authors         : Ben Niven-Jenkins
>>                           Ray van Brandenburg
>>         Filename        : draft-ietf-cdni-redirection-12.txt
>>         Pages           : 30
>>         Date            : 2015-10-07
>>
>> Abstract:
>>    The Request Routing Interface comprises of (1) the asynchronous
>>    advertisement of footprint and capabilities by a downstream Content
>>    Delivery Network (CDN) that allows an upstream CDN to decide whether
>>    to redirect particular user requests to that downstream CDN; and (2)
>>    the synchronous operation of an upstream CDN requesting whether a
>>    downstream CDN is prepared to accept a user request and of a
>>    downstream CDN responding with how to actually redirect the user
>>    request.  This document describes an interface for the latter part,
>>    i.e. the CDNI Request Routing Redirection interface.
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-ietf-cdni-redirection/
>>
>> There's also a htmlized version available at:
>> https://tools.ietf.org/html/draft-ietf-cdni-redirection-12
>>
>> A diff from the previous version is available at:
>> https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-redirection-12
>>
>>
>> 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/
>>
>> _______________________________________________
>> CDNi mailing list
>> CDNi@ietf.org
>> https://www.ietf.org/mailman/listinfo/cdni
>>
> _______________________________________________
> CDNi mailing list
> CDNi@ietf.org
> https://www.ietf.org/mailman/listinfo/cdni
>
>
>

--047d7b2e429259af7205219b8740
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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Just for clarity, I found what I was looking for in=C2=A0<=
a href=3D"https://tools.ietf.org/html/rfc6983#section-2.2.1">https://tools.=
ietf.org/html/rfc6983#section-2.2.1</a>=C2=A0(which is an anagram of RFC398=
6). It&#39;s really defined as a player behavior, but as far as I can tell =
there is currently no way to signal the client player to act in a specific =
way so I guess there is no point in signaling this between the uCDN and dCD=
N.<br><br>Thanks.<br><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu=
, Oct 8, 2015 at 1:22 AM Ben Niven-Jenkins &lt;<a href=3D"mailto:ben@niven-=
jenkins.co.uk">ben@niven-jenkins.co.uk</a>&gt; wrote:<br></div><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid=
;padding-left:1ex"><div style=3D"word-wrap:break-word">Hi Phil,<div><br><di=
v></div></div></div><div style=3D"word-wrap:break-word"><div><div><blockquo=
te type=3D"cite"><div>On 7 Oct 2015, at 23:15, Phil Sorber &lt;<a href=3D"m=
ailto:sorber@apache.org" target=3D"_blank">sorber@apache.org</a>&gt; wrote:=
</div><br><div><div dir=3D"ltr"><div>There is a sentence in section 2 about=
 HTTP redirection:<br><br>&gt; Examples of an application level redirection=
 are HTTP 302 Redirection and RTMP
 302 Redirection.<br><br>and then various other references to 302 redirecti=
on throughout the document. My question is, what is the expectation for a m=
ulti-asset exchange like segmented video where a UA is sent to a manifest a=
nd then expected to download a series of video segments. Should the UA cont=
inually go back to the redirector, or should it &quot;stick&quot; to the ho=
st it was redirected to?</div></div></div></blockquote><div><br></div></div=
></div></div><div style=3D"word-wrap:break-word"><div><div>It depends on th=
e type of reference. Sections 4 &amp; 5 of RFC3986 cover this. =C2=A0</div>=
<div></div></div></div><div style=3D"word-wrap:break-word"><div><div><br><b=
lockquote type=3D"cite"><div><div dir=3D"ltr"><div>Perhaps this is out of t=
he scope of this document?<br></div></div></div></blockquote><div><br></div=
></div></div></div><div style=3D"word-wrap:break-word"><div><div>Yes it is =
IMO.</div></div></div><div style=3D"word-wrap:break-word"><div><div><br></d=
iv><div>Ben</div></div></div><div style=3D"word-wrap:break-word"><div><div>=
<br><blockquote type=3D"cite"><div><div dir=3D"ltr"><div><br><div class=3D"=
gmail_quote"><div dir=3D"ltr">On Wed, Oct 7, 2015 at 2:52 AM &lt;<a href=3D=
"mailto:internet-drafts@ietf.org" target=3D"_blank">internet-drafts@ietf.or=
g</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.<br>
=C2=A0This draft is a work item of the Content Delivery Networks Interconne=
ction Working Group of the IETF.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 Request Routing Redirection Interface for CDN Interconnection<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Authors=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0: Ben =
Niven-Jenkins<br>
=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 Ray van Brandenburg<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-iet=
f-cdni-redirection-12.txt<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 30<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 :=
 2015-10-07<br>
<br>
Abstract:<br>
=C2=A0 =C2=A0The Request Routing Interface comprises of (1) the asynchronou=
s<br>
=C2=A0 =C2=A0advertisement of footprint and capabilities by a downstream Co=
ntent<br>
=C2=A0 =C2=A0Delivery Network (CDN) that allows an upstream CDN to decide w=
hether<br>
=C2=A0 =C2=A0to redirect particular user requests to that downstream CDN; a=
nd (2)<br>
=C2=A0 =C2=A0the synchronous operation of an upstream CDN requesting whethe=
r a<br>
=C2=A0 =C2=A0downstream CDN is prepared to accept a user request and of a<b=
r>
=C2=A0 =C2=A0downstream CDN responding with how to actually redirect the us=
er<br>
=C2=A0 =C2=A0request.=C2=A0 This document describes an interface for the la=
tter part,<br>
=C2=A0 =C2=A0i.e. the CDNI Request Routing Redirection interface.<br>
<br>
<br>
The IETF datatracker status page for this draft is:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-ietf-cdni-redirection/" r=
el=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/draft-=
ietf-cdni-redirection/</a><br>
<br>
There&#39;s also a htmlized version available at:<br>
<a href=3D"https://tools.ietf.org/html/draft-ietf-cdni-redirection-12" rel=
=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/draft-ietf-cd=
ni-redirection-12</a><br>
<br>
A diff from the previous version is available at:<br>
<a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-redirection-=
12" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdiff?url2=
=3Ddraft-ietf-cdni-redirection-12</a><br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org/" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
Internet-Drafts are also available by anonymous FTP at:<br>
<a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=3D"noreferrer" target=
=3D"_blank">ftp://ftp.ietf.org/internet-drafts/</a><br>
<br>
_______________________________________________<br>
CDNi mailing list<br>
<a href=3D"mailto:CDNi@ietf.org" target=3D"_blank">CDNi@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/cdni" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/cdni</a><br>
</blockquote></div></div></div>
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From nobody Fri Oct  9 04:36:31 2015
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Subject: [CDNi] I-D Action: draft-ietf-cdni-redirection-13.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 Content Delivery Networks Interconnection Working Group of the IETF.

        Title           : Request Routing Redirection Interface for CDN Interconnection
        Authors         : Ben Niven-Jenkins
                          Ray van Brandenburg
	Filename        : draft-ietf-cdni-redirection-13.txt
	Pages           : 31
	Date            : 2015-10-09

Abstract:
   The Request Routing Interface comprises of (1) the asynchronous
   advertisement of footprint and capabilities by a downstream Content
   Delivery Network (CDN) that allows an upstream CDN to decide whether
   to redirect particular user requests to that downstream CDN; and (2)
   the synchronous operation of an upstream CDN requesting whether a
   downstream CDN is prepared to accept a user request and of a
   downstream CDN responding with how to actually redirect the user
   request.  This document describes an interface for the latter part,
   i.e. the CDNI Request Routing Redirection interface.


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

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-redirection-13

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-redirection-13


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 Fri Oct  9 04:37:19 2015
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From: "Brandenburg, R. (Ray) van" <ray.vanbrandenburg@tno.nl>
To: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>, Ma Kevin <kevin.j.ma@ericsson.com>
Thread-Topic: [CDNi] Update of draft-ietf-cdni-redirection
Thread-Index: AQHRAN38q2luPuQAo0m62xCEZvIS1p5g5uswgAC5f4CAAWpFAA==
Date: Fri, 9 Oct 2015 11:32:42 +0000
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References: <73F3A4F6-FC5D-4BC8-BEEC-82F27BA3641F@tno.nl> <102272CE-9EF0-4959-B9E2-8A2F10147BF7@cisco.com> <A419F67F880AB2468214E154CB8A556206B64050@eusaamb103.ericsson.se> <B90EBF67-2395-4918-AAE2-6DA1E95175C9@cisco.com>
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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 Content Delivery Networks Interconnection Working Group of the IETF.

        Title           : CDNI Media Type Registration
        Author          : Kevin J. Ma
	Filename        : draft-ietf-cdni-media-type-05.txt
	Pages           : 6
	Date            : 2015-10-10

Abstract:
   This document defines the standard media type used by the Content
   Delivery Network Interconnection (CDNI) protocol suite, including the
   registration procedure and recommended usage of the required payload-
   type parameter .


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-media-type-05

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-media-type-05


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 Sat Oct 10 07:37:08 2015
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From: Kevin Ma J <kevin.j.ma@ericsson.com>
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updated to address genart and secdir comments.

> -----Original Message-----
> From: CDNi [mailto:cdni-bounces@ietf.org] On Behalf Of internet-
> drafts@ietf.org
> Sent: Saturday, October 10, 2015 10:35 AM
> To: i-d-announce@ietf.org
> Cc: cdni@ietf.org
> Subject: [CDNi] I-D Action: draft-ietf-cdni-media-type-05.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>  This draft is a work item of the Content Delivery Networks
> Interconnection Working Group of the IETF.
>=20
>         Title           : CDNI Media Type Registration
>         Author          : Kevin J. Ma
> 	Filename        : draft-ietf-cdni-media-type-05.txt
> 	Pages           : 6
> 	Date            : 2015-10-10
>=20
> Abstract:
>    This document defines the standard media type used by the Content
>    Delivery Network Interconnection (CDNI) protocol suite, including the
>    registration procedure and recommended usage of the required payload-
>    type parameter .
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/
>=20
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-cdni-media-type-05
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-media-type-05
>=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
> _______________________________________________
> CDNi mailing list
> CDNi@ietf.org
> https://www.ietf.org/mailman/listinfo/cdni


From nobody Mon Oct 12 05:41:27 2015
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Just FYI

>=20
> cdni Session=20
>    Wednesday, Morning Session I 0900-1130
>    Room Name: Rooms 411/412 size: 120
>    ---------------------------------------------
>=20


From nobody Tue Oct 13 07:31:34 2015
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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 Content Delivery Networks Interconnection Working Group of the IETF.

        Title           : CDNI Media Type Registration
        Author          : Kevin J. Ma
	Filename        : draft-ietf-cdni-media-type-06.txt
	Pages           : 6
	Date            : 2015-10-13

Abstract:
   This document defines the standard media type used by the Content
   Delivery Network Interconnection (CDNI) protocol suite, including the
   registration procedure and recommended usage of the required payload-
   type parameter .


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-media-type-06

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-media-type-06


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 Oct 13 07:33:01 2015
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updates to address genart, opsdir, and iana review comments.

> -----Original Message-----
> From: CDNi [mailto:cdni-bounces@ietf.org] On Behalf Of internet-
> drafts@ietf.org
> Sent: Tuesday, October 13, 2015 10:32 AM
> To: i-d-announce@ietf.org
> Cc: cdni@ietf.org
> Subject: [CDNi] I-D Action: draft-ietf-cdni-media-type-06.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>  This draft is a work item of the Content Delivery Networks
> Interconnection Working Group of the IETF.
>=20
>         Title           : CDNI Media Type Registration
>         Author          : Kevin J. Ma
> 	Filename        : draft-ietf-cdni-media-type-06.txt
> 	Pages           : 6
> 	Date            : 2015-10-13
>=20
> Abstract:
>    This document defines the standard media type used by the Content
>    Delivery Network Interconnection (CDNI) protocol suite, including the
>    registration procedure and recommended usage of the required payload-
>    type parameter .
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/
>=20
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-cdni-media-type-06
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-cdni-media-type-06
>=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
> _______________________________________________
> CDNi mailing list
> CDNi@ietf.org
> https://www.ietf.org/mailman/listinfo/cdni


From nobody Wed Oct 14 09:48:57 2015
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From: "Benoit Claise" <bclaise@cisco.com>
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Cc: cdni-chairs@ietf.org, menachemdodge1@gmail.com, draft-ietf-cdni-media-type.shepherd@ietf.org, draft-ietf-cdni-media-type.ad@ietf.org, cdni@ietf.org, draft-ietf-cdni-media-type@ietf.org
Subject: [CDNi] Benoit Claise's No Objection on draft-ietf-cdni-media-type-06: (with COMMENT)
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Benoit Claise has entered the following ballot position for
draft-ietf-cdni-media-type-06: No Objection

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Here is Menachem's OPS DIR review:

"Introduction and Scope" section 4th sentence
------------------------------------------------------------------

OLD:            To accomplish this aims, this document defines
SUGGEST:  To accomplish this aim, this document defines


I found that the organization of the document caused me some difficulty
because the definition of the media type and payload type parameter was
handled within the request to IANA. Normally a separate IANA section is
added at the end of the document which refers to the items in the main
document body.



From nobody Wed Oct 14 13:20:54 2015
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Subject: [CDNi] Stephen Farrell's No Objection on draft-ietf-cdni-media-type-06: (with COMMENT)
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Stephen Farrell has entered the following ballot position for
draft-ietf-cdni-media-type-06: No Objection

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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------


The secdir review [1] suggests to check some ABNF. I'd say that
would be a good plan as errors like that are more of a pain
later.

[1] https://www.ietf.org/mail-archive/web/secdir/current/msg06093.html



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To: "Peterson, Jon <jon.peterson@neustar.biz> (jon.peterson@neustar.biz)" <jon.peterson@neustar.biz>
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From: "Peterson, Jon" <jon.peterson@neustar.biz>
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Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
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If I recall the substance of my comment was that the cdni-redirection
mechanism works for HTTPS redirection a lot more securely than for DNS
redirection, and that the particular problem with DNS redirection when
using HTTPS (that you will end up seeing a surprising certificate on the
other side of your TLS connection) should be noted since DNS redirection
is in scope of cdni-redirection draft. I don't think the problem needs to
be solved there, but it needs to be acknowledged. Because DNS responses
are insecure (barring DNSSEC), then using DNS for redirection can
introduce the problems discussed in draft-fieau-https-delivery-delegation.
Dropping in a reference to that draft, or summarizing the problem, would
suffice.

I don't think the text below really captures that. If this is super
confusing I can send text.

Jon Peterson
Neustar, Inc.

On 10/15/15, 5:25 AM, "Francois Le Faucheur (flefauch)"
<flefauch@cisco.com> wrote:

>Hi Jon,
>
>We=B9ll wait a couple more days to hear back from you on the point below,
>and then move the document forward.
>
>Thanks
>
>Francois
>
>> On 7 Oct 2015, at 14:04, Francois Le Faucheur (flefauch)
>><flefauch@cisco.com> wrote:
>>=20
>> Jon,
>>=20
>> Can you confirm this new rev addresses your comment appropriately?
>> I believe the text that was added for that purpose is:
>> =B3
>> 3.1.  Redirection of encrypted traffic
>>=20
>>      The Redirection Interface defined in this document might be used to
>>=20
>>      redirect a request where the User Agent will subsequently attempt
>>to
>>=20
>>      establish a TLS session with the Redirection Target.  In such a
>>case,
>>=20
>>      any surrogate or request router to which the User Agent is
>>redirected
>>=20
>>      needs to be able to successfully complete the TLS handshake and to
>>=20
>>      perform encryption of the TLS channel.  Mechanisms to distribute
>>the
>>=20
>>      required information and/or configuration, such as private keys, to
>>=20
>>      surrogates and request routers in dCDNs are outside the scope of
>>this
>>=20
>>      document.
>> =B3
>>=20
>


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Hi all,

Overall, the RFC is very well written, and covers the topic in depth. I =
have a
number of suggestions below, many of which are very nitpicky. I will not =
be
offended if they are silently ignored :).

That much said, I do feel that the draft is a bit verbose in some areas. =
I've
included some of that in the nitpicks below as well. Maybe this is an
editorial issue though, but also see Question 2) below.

Caveat 1: I'm not a crypto person, so I can't vouch for the strength of =
the
symmetric and asymmetric algorithms chosen. They seem fine to me though.

Caveat 2: I have not read all the other CDNI RFCs / drafts thoroughly, =
so I
have not validated all the Interface sections in this draft for =
correctness
with those RFCs.

Caveat 3: I did not thorough editorial editing / suggestions here, such =
as
grammar or spelling.

And thanks for adding KID_NUM :).

Cheers,

-- Leif


Questions
---------

1) On Signing Package Attributes:

This is mostly an observation, but why is the "Signing Package =
Attribute"
needed? What problem does that solve? It sort of hides otherwise useful
information when debugging, log analysis ("which KID_NUM's are being =
used")
etc. Could this step be optional, such that the URL is kept intact with =
the ET
/ KID_NUM / MD query parameters if so desired?

It'd also make it easier / cheaper to do some obvious and quick =
evaluations
which does not require cryptographic ("expensive") operations. Such as, =
making
sure the ET is not expired, that the KID_NUM is supported, and that the =
request
does have an MD at all. This is now slightly harder, since you have to
un-base64 the string into at least a temp buffer on the stack (but be =
aware of
stack overflows :)  before any other validations can be performed.

In any implementation of this, I would definitely suggest that the =
"cheap"
validations be done first (time, KID_NUM validity, CIP etc.). One use =
case of URI
signatures is (as mentioned before) to make various DDoS attacks, or =
screen
scraping, harder. As such, it needs to be "cheap" on the edge nodes.

2) On CDNI interfaces vs URI signing in general

I understand that the point of this RFC is for integration with CDNI. =
And it
mentions that the specifications are usable by non-CDNI implementations =
and
services. My gut tells me that this RFC could be easier to read and =
implement,
if this was split up into two RFCs. One just for the URI signing
implementation, and one specifically for the CDNI integration portions.

3) URI Path selection

We've discussed this in the past, and perhaps this is outside of the =
scope of
this revision, but I miss a component for URI path selection. With this =
I
mean, some way to say that only certain portions of the path of a URI =
should
be used for the signature. A couple of requirements I've dealt with =
myself
include:

   a) Specify the number  (prefix) of path components that should be =
use. So,
   e.g. "PS=3D3" indicating, use only the first three path components.

   b) Selectors, like "PS=3D1,3-5,9", using path component 1, 3, 4, 5 =
and 9 in
   the signature, but nothing else.

I know this could get arbitrarily complex, but curious to hear if anyone =
else
has had these requirements. If so, maybe this is worth revisiting?


Things to consider
------------------

Page 7:

It says

  "Note that the signed Redirection URI SHOULD maintain the same level =
of
  security as the original Signed URI."

What is the reason why this is only a SHOULD? Why not MUST? Or maybe =
even
the even stronger

  " ... MUST maintain the same, or higher, level of security ....".

As I read the current text, it would be allowed to not even sign the
Redirection URI?


Page 9:

It could be useful to allow expressing the client IP as a subnet, for =
two
reasons

	1) Privacy
	2) Flexibility (such as NAT or transparent proxy layers)

Allowing for the signature to be verified for e.g. a /24 would therefore =
be
useful IMO.

1) is sort of touched on in Section 10, but just says it should be =
removed
from logging. I don't think this is strong enough, with pervasive =
monitoring
of networks. 2) is of course obvious when a UA sits behind a layer of 2 =
or
more intermediaries or middle-boxes, such that the source IP can be =
different
for the various requests.


Page 12-13 (Section 2.5 primarily):

The text says that the UA is allowed to append additional attributes =
after the
URI signature. Section 2.5 talks a little bit about the issues with =
this, and
a RECOMMEND to ignore query strings passed after the the Signing Package
Attribute.

This seems to weak to me, and potentially fragile. In addition, I can =
think of
many other ways where this could be abuse. For example, if a CDN allows =
the
additional query parameters, it could be very easy to perform cache =
busting
attacks. I think we should either

	 1) Simply not allow this   - or -
	 2) Have an additional URI Signature Information Element, to
	    declare intent.

With 2), the URI would specify if additional parameters are allowed =
after the
signature or not.


Page 15:

Sometimes, it could be useful to allow a URI signature to not only skip =
the
scheme, but also the host portion. For example, people use domain =
sharding
still (at least until H2 is more used). As such, it might make sense to =
allow
the same signed URI to hit 2 or more different shards within the =
sharding.

If we added another URI Signature Information Element to indicate this, =
we
could easily change the algorithm such that the "base" string is from =
the
first "/" in the path and forward.


Page 23:

Section 5.2 looks odd, I think there were some editing / copy-paste =
issues
here? Needs editing I think.

It also says "Advertise "MD" Information Element (i.e.  EC-DSA) to =
indicate
support for symmetric key method". I'm not sure I follow this, we only =
use
HMAC for the symmetric keys. Maybe it should say "HMAC" instead of =
"EC-DSA"?


Page 24-25:

In the documentation for the properties, there's always a section for
"Mandatory-to-specify". However, as far as I can tell it is always "no", =
so
why bother listing this for every property? Can't we just say that =
properties
are never mandatory, and reduce the docs to document the default for =
each one?=20



Nitpicks
--------

Page 3:

I think we should drop the HMAC terminology and just refer / link to =
existing
RFCs (just as you did referring to RFC 6707. Maybe a short sentence for =
each
reference?

I'd just drop the first paragraph in section 1.2, it's verbose and
superfluous. The title is sufficient IMO, or could be improved with e.g.

    Background and overview on URI Signing


Page 5:

It says

  "In addition, it checks whether the IP address of the HTTP request =
matches
  that in the Signed URI and if the time window is still valid"


However, the IP address is optional in the signature generation. Maybe =
change
"In addition" to "If applicable" ?


Page 6-7:

In the overview, maybe it'd be useful to show an example signed URL, =
with a
very brief explanation of the components (as a picture). This would help =
the
in-depth explanations of all the components further down the road.


Page 7-8:

Figure 2: and the text is slightly confusing to me. The text says that =
in the
case where the Downstream CDN does not have a trust relationship with =
the CSP,
it must use asymmetric encryption. This makes sense, but I'm not sure I =
see or
understand this in Picture 2? I guess I'm not sure what the picture is =
trying
to tell, since it looks the same for both HTTP and DNS :).=20


Page 10:

It says

  "Note: The time, including time zone, on the entities that generate =
and
   validate the signed URI need to be in sync (e.g.  NTP is used)."


Maybe it should be worded more strongly, such as MUST? And perhaps also
clarify what it should be in sync with? One could read this is being in =
sync
with the CSP, whereas the intent of this Note is that all servers should =
be in
sync with a universal time source, using e.g. NTP.


Page 15:

Why do we retain the :// ? Is that just a convenience? Ease of =
implementation?
It obviously adds no value to the signature.


Page 15:

It also says

  "Get the current time in seconds since epoch (as an integer)."

time_t can be either 32-bit or 64-bit, it might be worthwhile to say =
that ET
is a signed 64-bit integer type to cover all bases?


Page 22 (Section 4.3)

The first paragraph reads oddly. "Note the steps are to be skipped if =
the
...". What steps? I believe it refers to the steps in Section 4.2?

As discussed above in "Question" section, it might be worth pointing out =
which
elements are worthwhile to validate before doing cryptographic =
operations
(such as CIP and ET).


Page 28 - 31:

It's unfortunate that the pictures in Section 6.1 and Section 6.2 wraps =
over
multiple pages.

Page 34-35:

The security considerations are valid, but the vulnerability of replay =
attacks
seems like a stretch. If the service is vulnerable to a replay attack, =
it
really should use something stronger than URI signatures. This was =
pointed out
early on in the document as well, so I feel this section sort of murks =
the
water a little.


From nobody Fri Oct 16 00:49:27 2015
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Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
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Hi Jon,

> On 16 Oct 2015, at 00:52, Peterson, Jon <jon.peterson@neustar.biz> =
wrote:
>=20
>=20
> If I recall the substance of my comment was that the cdni-redirection
> mechanism works for HTTPS redirection a lot more securely than for DNS
> redirection, and that the particular problem with DNS redirection when
> using HTTPS (that you will end up seeing a surprising certificate on =
the
> other side of your TLS connection) should be noted since DNS =
redirection
> is in scope of cdni-redirection draft. I don't think the problem needs =
to
> be solved there, but it needs to be acknowledged. Because DNS =
responses
> are insecure (barring DNSSEC), then using DNS for redirection can
> introduce the problems discussed in =
draft-fieau-https-delivery-delegation.
> Dropping in a reference to that draft, or summarizing the problem, =
would
> suffice.

The challenge with writing a paragraph like that is that =
draft-fieau-https-delivery-delegation misunderstands how DNS works and =
the security issue it highlights doesn=92t exist in practice.

=46rom the slides for draft-fieau-https-delivery-delegation from the =
last IETF, Section 5 of draft-fieau-https-delivery-delegation states:

=93=94=94
   In this case, the DNS resolver,
   when it queries for the hostname associated with the uCDN URL, will
   be served a DNS response (such as CNAME) that will direct the client
   to the dCDN.  However, in an HTTPS environment, this will result in
   the client containing a domain other than the one originally
   specified by the URL inputted by the end user.  Consequently, this
   will almost certainly result in a security failure when the browser
   attempts to negotiate TLS with the web server it contacts, as the
   change in domain name will be indistinguishable from a malicious
   attacker.
=93=94=94

How DNS redirection works is that the User Agent does a resolution for =
foo.example and it gets a response for foo.example. The fact a CNAME is =
present & resolved by the DNS resolver is invisible to the User Agent =
(evidenced by the fact the URL bar in the browser doesn=92t change =
domain name/hostname when DNS redirection is performed). Therefore as =
long as the IP address(es) in the DNS response presents the correct =
certificate for foo.example and has the correct credentials (e.g. =
Private key for foo.example) to complete the TLS handshake & =
encrypt/decrypt traffic on that TLS session the User Agent will not =
complain. This is how DNS-based HTTPS redirection is done in CDNs today =
where typically a CSP will provide their certificate & private key to =
the CDN so the CDN can terminate TLS sessions successfully on the CSP=92s =
behalf. which means if HTTPS redirection is insecure for CDNI then HTTPS =
redirection used by CDNs in the wild today (without CDNI) is also =
insecure (which it isn=92t).

IMO I think the real problem is a different thing that =
draft-slovetskiy-cdni-https-delegation-approaches hints at without =
stating explicitly. That is how far will a CSP trust delegating its =
credentials (e.g. Private key) given that the consequences of leakage of =
those credentials are very bad. There are possible solutions to avoid =
the CSP having to distribute their credentials (e.g. Keyless SSL) but =
from the perspective of the redirection draft they=92re out of scope =
IMO.

HTH
Ben


>=20
> I don't think the text below really captures that. If this is super
> confusing I can send text.
>=20
> Jon Peterson
> Neustar, Inc.
>=20
> On 10/15/15, 5:25 AM, "Francois Le Faucheur (flefauch)"
> <flefauch@cisco.com> wrote:
>=20
>> Hi Jon,
>>=20
>> We=B9ll wait a couple more days to hear back from you on the point =
below,
>> and then move the document forward.
>>=20
>> Thanks
>>=20
>> Francois
>>=20
>>> On 7 Oct 2015, at 14:04, Francois Le Faucheur (flefauch)
>>> <flefauch@cisco.com> wrote:
>>>=20
>>> Jon,
>>>=20
>>> Can you confirm this new rev addresses your comment appropriately?
>>> I believe the text that was added for that purpose is:
>>> =B3
>>> 3.1.  Redirection of encrypted traffic
>>>=20
>>>     The Redirection Interface defined in this document might be used =
to
>>>=20
>>>     redirect a request where the User Agent will subsequently =
attempt
>>> to
>>>=20
>>>     establish a TLS session with the Redirection Target.  In such a
>>> case,
>>>=20
>>>     any surrogate or request router to which the User Agent is
>>> redirected
>>>=20
>>>     needs to be able to successfully complete the TLS handshake and =
to
>>>=20
>>>     perform encryption of the TLS channel.  Mechanisms to distribute
>>> the
>>>=20
>>>     required information and/or configuration, such as private keys, =
to
>>>=20
>>>     surrogates and request routers in dCDNs are outside the scope of
>>> this
>>>=20
>>>     document.
>>> =B3
>>>=20
>>=20
>=20
> _______________________________________________
> CDNi mailing list
> CDNi@ietf.org
> https://www.ietf.org/mailman/listinfo/cdni


From nobody Fri Oct 16 08:20:34 2015
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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 Content Delivery Networks Interconnection Working Group of the IETF.

        Title           : CDNI Logging Interface
        Authors         : Francois Le Faucheur
                          Gilles Bertrand
                          Iuniana Oprescu
                          Roy Peterkofsky
	Filename        : draft-ietf-cdni-logging-20.txt
	Pages           : 57
	Date            : 2015-10-16

Abstract:
   This memo specifies the Logging interface between a downstream CDN
   (dCDN) and an upstream CDN (uCDN) that are interconnected as per the
   CDN Interconnection (CDNI) framework.  First, it describes a
   reference model for CDNI logging.  Then, it specifies the CDNI
   Logging File format and the actual protocol for exchange of CDNI
   Logging Files.


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

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-logging-20

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

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


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>How DNS redirection works is that the User Agent does a resolution for
>foo.example and it gets a response for foo.example. The fact a CNAME is
>present & resolved by the DNS resolver is invisible to the User Agent
>(evidenced by the fact the URL bar in the browser doesn=B9t change domain
>name/hostname when DNS redirection is performed).

It is certainly invisible to the browser when every dCDN holds the private
key of every uCDN that might redirect to it, as you stipulate below. If
that is an operational requirement of the DNS redirection mechanism in
cdni-redirection, it needs to be made explicit. The proposed text just
says that "any surrogate or request router to which the User Agent is
redirected needs to be able to successfully complete the TLS handshake"
etc., which could be read to imply that as a solution, but not if you
don't understand what the problem is in the first place. I was asking that
this acknowledge the problem, not specify a solution.

Moreover, the substance of my comment was that the problem is different
for DNS redirection than it is for HTTPS redirection. HTTPS redirection
shouldn't require every dCDN to have every uCDNs private keying material.
The proposed text treats this like the two methods have the same
properties.

> Therefore as long as the IP address(es) in the DNS response presents the
>correct certificate for foo.example and has the correct credentials (e.g.
>Private key for foo.example) to complete the TLS handshake &
>encrypt/decrypt traffic on that TLS session the User Agent will not
>complain. This is how DNS-based HTTPS redirection is done in CDNs today
>where typically a CSP will provide their certificate & private key to the
>CDN so the CDN can terminate TLS sessions successfully on the CSP=B9s
>behalf. which means if HTTPS redirection is insecure for CDNI then HTTPS
>redirection used by CDNs in the wild today (without CDNI) is also
>insecure (which it isn=B9t).

Identifying a known workaround does not mean there isn't a problem. That
there is a workaround is proof there is a problem.

>IMO I think the real problem is a different thing that
>draft-slovetskiy-cdni-https-delegation-approaches hints at without
>stating explicitly. That is how far will a CSP trust delegating its
>credentials (e.g. Private key) given that the consequences of leakage of
>those credentials are very bad. There are possible solutions to avoid the
>CSP having to distribute their credentials (e.g. Keyless SSL) but from
>the perspective of the redirection draft they=B9re out of scope IMO.

The fact that there are two drafts trying to improve the workaround does
not convince me that the problem isn't worth noting.

Jon Peterson
Neustar, Inc.


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From nobody Fri Oct 16 10:40:40 2015
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Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
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Hi Jon,

> On 16 Oct 2015, at 17:06, Peterson, Jon <jon.peterson@neustar.biz> =
wrote:
>=20
>=20
>> How DNS redirection works is that the User Agent does a resolution =
for
>> foo.example and it gets a response for foo.example. The fact a CNAME =
is
>> present & resolved by the DNS resolver is invisible to the User Agent
>> (evidenced by the fact the URL bar in the browser doesn=B9t change =
domain
>> name/hostname when DNS redirection is performed).
>=20
> It is certainly invisible to the browser when every dCDN holds the =
private
> key of every uCDN that might redirect to it, as you stipulate below.

I explained how it is done in the majority of cases today. That isn=92t =
the only solution, Keyless SSL is another for example.

> If
> that is an operational requirement of the DNS redirection mechanism in
> cdni-redirection, it needs to be made explicit.

It=92s not an operational requirement IMO, the operational requirement =
is that the dCDN is able to successfully complete the TLS handshake and =
to perform encryption (and decryption) of the TLS channel.

> The proposed text just
> says that "any surrogate or request router to which the User Agent is
> redirected needs to be able to successfully complete the TLS =
handshake"
> etc., which could be read to imply that as a solution, but not if you
> don't understand what the problem is in the first place. I was asking =
that
> this acknowledge the problem, not specify a solution.

Good, that=92s what we were trying to do, maybe the text we used needs =
some refinement to be better understandable to others but we worded it =
the way it is to explicitly avoid suggesting a solution.

> Moreover, the substance of my comment was that the problem is =
different
> for DNS redirection than it is for HTTPS redirection.

> HTTPS redirection
> shouldn't require every dCDN to have every uCDNs private keying =
material.
> The proposed text treats this like the two methods have the same
> properties.

I think it may depend what angle you view the problem from. =46rom my =
angle of view the problem is that the dCDN needs to successfully =
complete the TLS handshake and to perform encryption of the TLS channel. =
What the dCDN needs in order to do that is the same in both cases: =
private keys, or some other mechanism such as Keyless SSL that will =
enable the dCDN to complete the handshake and encrypt/decrypt the =
traffic.

The fact that for a lot of HTTPS 302 redirection cases the dCDN will be =
redirecting to a hostname under the dCDN=92s control (but that is not =
guaranteed) may make being able to successfully complete the TLS =
handshake and to perform encryption of the TLS channel easier for the =
dCDN but it doesn=92t change the basic problem of what the dCDN needs in =
order to do its job. And for (at least some) cases where the 302 =
redirection is to a hostname not under control of the dCDN the =
properties are the same for both DNS & HTTPS 302 redirection.

>> Therefore as long as the IP address(es) in the DNS response presents =
the
>> correct certificate for foo.example and has the correct credentials =
(e.g.
>> Private key for foo.example) to complete the TLS handshake &
>> encrypt/decrypt traffic on that TLS session the User Agent will not
>> complain. This is how DNS-based HTTPS redirection is done in CDNs =
today
>> where typically a CSP will provide their certificate & private key to =
the
>> CDN so the CDN can terminate TLS sessions successfully on the CSP=B9s
>> behalf. which means if HTTPS redirection is insecure for CDNI then =
HTTPS
>> redirection used by CDNs in the wild today (without CDNI) is also
>> insecure (which it isn=B9t).
>=20
> Identifying a known workaround does not mean there isn't a problem. =
That
> there is a workaround is proof there is a problem.

I=92m not sure I=92d call the way that the majority of CDN delivered =
HTTPS traffic is delivered a workaround myself (I only described the =
most common mechanism, there are others mechanisms that don=92t rely on =
sharing the private key and which are used in the wild, e.g. Keyless =
SSL).

But that=92s off-topic so let=92s move on.

>=20
>> IMO I think the real problem is a different thing that
>> draft-slovetskiy-cdni-https-delegation-approaches hints at without
>> stating explicitly. That is how far will a CSP trust delegating its
>> credentials (e.g. Private key) given that the consequences of leakage =
of
>> those credentials are very bad. There are possible solutions to avoid =
the
>> CSP having to distribute their credentials (e.g. Keyless SSL) but =
from
>> the perspective of the redirection draft they=B9re out of scope IMO.
>=20
> The fact that there are two drafts trying to improve the workaround =
does
> not convince me that the problem isn't worth noting.

The problem is worth noting, which is what we did, as noted above it =
seems our text needs more work.

It is also worth noting IMO that neither of the two drafts actually =
describe or mention the problem we are discussing but merely hint at it =
and then attribute the cause of it to the presence of a CNAME in the =
call flow, rather than the true cause which is lack of ability of the =
dCDN to successfully complete the TLS handshake.

Anyway, does this proposal get us closer to some text you=92d be happy =
with?

=3D=3D=3DOLD=3D=3D=3D
The Redirection Interface defined in this document might be used to =
redirect a request where the User Agent will subsequently attempt to =
establish a TLS session with the Redirection Target.  In such a case, =
any surrogate or request router to which the User Agent is redirected =
needs to be able to successfully complete the TLS handshake and to =
perform encryption of the TLS channel.  Mechanisms to distribute the =
required information and/or configuration, such as private keys, to =
surrogates and request routers in dCDNs are outside the scope of this =
document.
=3D=3D=3DNEW=3D=3D=3D
The Redirection Interface defined in this document might be used to =
redirect a request where the User Agent will subsequently attempt to =
establish a TLS session with the Redirection Target. In such a case, any =
surrogate or request router to which the User Agent is redirected needs =
to be able to successfully complete the TLS handshake and to perform =
encryption of the TLS channel.

The private key for the host in the RT is needed in order to =
successfully establish a TLS session. The most widespread mechanism =
currently used by (non-interconnected) CDNs is for the owner of the host =
in the RT sharing their private key with their CDN(s) of choice. In =
cases where the owner of the host is not willing to share their private =
key, other mechanisms that allow the owner to not share their private =
key are used, for example Keyless SSL [REF].

CDNI by definition implies that a Content Provider=92s content will be =
delivered by CDNs other than the CDN with which the Content Provider has =
a direct business relationship. Therefore, while CDNI does not introduce =
any new technical requirements on dCDNs when establishing TLS sessions, =
Content Providers may be less willing to have their private key shared =
with dCDNs than they are with their chosen CDN(s) in a =
non-interconnected scenario.

Mechanisms to distribute the required information and/or configuration =
to surrogates and request routers in dCDNs to enable a dCDN to =
successfully complete TLS handshakes and to perform encryption of the =
TLS channel for a particular host, such as private keys or the URI/IP =
address of a key server, are outside the scope of this document.

[REF] =
https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical-details=
/ =
<https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical-detail=
s/>
=3D=3D=3DEND=3D=3D=3D

Ben

>=20
> Jon Peterson
> Neustar, Inc.
>=20


--Apple-Mail=_12DB28E3-9E6F-43CC-8025-38149828C7A8
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=windows-1252

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Hi Jon,<div class=3D""><br class=3D""></div><div =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
16 Oct 2015, at 17:06, Peterson, Jon &lt;<a =
href=3D"mailto:jon.peterson@neustar.biz" =
class=3D"">jon.peterson@neustar.biz</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><br =
class=3D""><blockquote type=3D"cite" class=3D"">How DNS redirection =
works is that the User Agent does a resolution for<br =
class=3D"">foo.example and it gets a response for foo.example. The fact =
a CNAME is<br class=3D"">present &amp; resolved by the DNS resolver is =
invisible to the User Agent<br class=3D"">(evidenced by the fact the URL =
bar in the browser doesn=B9t change domain<br class=3D"">name/hostname =
when DNS redirection is performed).<br class=3D""></blockquote><br =
class=3D"">It is certainly invisible to the browser when every dCDN =
holds the private<br class=3D"">key of every uCDN that might redirect to =
it, as you stipulate below.</div></blockquote><div><br class=3D""></div>I =
explained how it is done in the majority of cases today. That isn=92t =
the only solution, Keyless SSL is another for example.</div><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""> If<br =
class=3D"">that is an operational requirement of the DNS redirection =
mechanism in<br class=3D"">cdni-redirection, it needs to be made =
explicit.</div></blockquote><div><br class=3D""></div>It=92s not an =
operational requirement IMO, the operational requirement is that the =
dCDN is able to successfully complete the TLS handshake and to perform =
encryption (and decryption) of the TLS channel.</div><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""> The =
proposed text just<br class=3D"">says that "any surrogate or request =
router to which the User Agent is<br class=3D"">redirected needs to be =
able to successfully complete the TLS handshake"<br class=3D"">etc., =
which could be read to imply that as a solution, but not if you<br =
class=3D"">don't understand what the problem is in the first place. I =
was asking that<br class=3D"">this acknowledge the problem, not specify =
a solution.<br class=3D""></div></blockquote><div><br =
class=3D""></div>Good, that=92s what we were trying to do, maybe the =
text we used needs some refinement to be better understandable to others =
but we worded it the way it is to explicitly avoid suggesting a =
solution.</div><div><br class=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D"">Moreover, the substance of my comment was =
that the problem is different<br class=3D"">for DNS redirection than it =
is for HTTPS redirection.</div></blockquote></div><div><blockquote =
type=3D"cite" class=3D""><div class=3D""> HTTPS redirection<br =
class=3D"">shouldn't require every dCDN to have every uCDNs private =
keying material.<br class=3D"">The proposed text treats this like the =
two methods have the same<br =
class=3D"">properties.</div></blockquote><div><br class=3D""></div>I =
think it may depend what angle you view the problem from. =46rom my =
angle of view the problem is that the dCDN needs to successfully =
complete the TLS handshake and to perform encryption of the TLS channel. =
What the dCDN needs in order to do that is the same in both cases: =
private keys, or some other mechanism such as Keyless SSL that will =
enable the dCDN to complete the handshake and encrypt/decrypt the =
traffic.</div><div><br class=3D""></div><div>The fact that for a lot of =
HTTPS 302 redirection cases the dCDN will be redirecting to a hostname =
under the dCDN=92s control (but that is not guaranteed) may make being =
able to&nbsp;successfully complete the TLS handshake and to perform =
encryption of the TLS channel easier for the dCDN but it doesn=92t =
change the basic problem of what the dCDN needs in order to do its job. =
And for (at least some) cases where the 302 redirection is to a hostname =
not under control of the dCDN the properties are the same for both DNS =
&amp; HTTPS 302 redirection.</div><div><br class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D""><blockquote type=3D"cite" =
class=3D"">Therefore as long as the IP address(es) in the DNS response =
presents the<br class=3D"">correct certificate for foo.example and has =
the correct credentials (e.g.<br class=3D"">Private key for foo.example) =
to complete the TLS handshake &amp;<br class=3D"">encrypt/decrypt =
traffic on that TLS session the User Agent will not<br =
class=3D"">complain. This is how DNS-based HTTPS redirection is done in =
CDNs today<br class=3D"">where typically a CSP will provide their =
certificate &amp; private key to the<br class=3D"">CDN so the CDN can =
terminate TLS sessions successfully on the CSP=B9s<br class=3D"">behalf. =
which means if HTTPS redirection is insecure for CDNI then HTTPS<br =
class=3D"">redirection used by CDNs in the wild today (without CDNI) is =
also<br class=3D"">insecure (which it isn=B9t).<br =
class=3D""></blockquote><br class=3D"">Identifying a known workaround =
does not mean there isn't a problem. That<br class=3D"">there is a =
workaround is proof there is a problem.<br =
class=3D""></div></blockquote><div><br class=3D""></div>I=92m not sure =
I=92d call the way that the majority of CDN delivered HTTPS traffic is =
delivered a workaround myself (I only described the most common =
mechanism, there are others mechanisms that don=92t rely on sharing the =
private key and which are used in the wild, e.g. Keyless =
SSL).</div><div><br class=3D""></div><div>But that=92s off-topic so =
let=92s move on.</div><div><br class=3D""></div><div><blockquote =
type=3D"cite" class=3D""><div class=3D""><br class=3D""><blockquote =
type=3D"cite" class=3D"">IMO I think the real problem is a different =
thing that<br class=3D"">draft-slovetskiy-cdni-https-delegation-approaches=
 hints at without<br class=3D"">stating explicitly. That is how far will =
a CSP trust delegating its<br class=3D"">credentials (e.g. Private key) =
given that the consequences of leakage of<br class=3D"">those =
credentials are very bad. There are possible solutions to avoid the<br =
class=3D"">CSP having to distribute their credentials (e.g. Keyless SSL) =
but from<br class=3D"">the perspective of the redirection draft they=B9re =
out of scope IMO.<br class=3D""></blockquote><br class=3D"">The fact =
that there are two drafts trying to improve the workaround does<br =
class=3D"">not convince me that the problem isn't worth noting.<br =
class=3D""></div></blockquote><div><br class=3D""></div>The problem is =
worth noting, which is what we did, as noted above it seems our text =
needs more work.</div><div><br class=3D""></div><div>It is also worth =
noting IMO that neither of the two drafts actually describe or mention =
the problem we are discussing but merely hint at it and then attribute =
the cause of it to the presence of a CNAME in the call flow, rather than =
the true cause which is lack of ability of the dCDN to successfully =
complete the TLS handshake.</div><div><br class=3D""></div><div>Anyway, =
does this proposal get us closer to some text you=92d be happy =
with?</div><div><br class=3D""></div><div>=3D=3D=3DOLD=3D=3D=3D</div><div>=
<div class=3D"">The Redirection Interface defined in this document might =
be used to redirect a request where the User Agent will subsequently =
attempt to establish a TLS session with the Redirection Target. &nbsp;In =
such a case, any surrogate or request router to which the User Agent is =
redirected needs to be able to successfully complete the TLS handshake =
and to perform encryption of the TLS channel. &nbsp;Mechanisms to =
distribute the required information and/or configuration, such as =
private keys, to surrogates and request routers in dCDNs are outside the =
scope of this document.</div><div class=3D"">=3D=3D=3DNEW=3D=3D=3D</div><d=
iv class=3D""><div class=3D""><div>The Redirection Interface defined in =
this document might be used to redirect a request where the User Agent =
will subsequently attempt to establish a TLS session with the =
Redirection Target. In such a case, any surrogate or request router to =
which the User Agent is redirected needs to be able to successfully =
complete the TLS handshake and to perform encryption of the TLS =
channel.</div><div><br class=3D""></div><div>The private key for the =
host in the RT is needed in order to successfully establish a TLS =
session. The most widespread mechanism currently used by =
(non-interconnected) CDNs is for the owner of the host in the RT sharing =
their private key with their CDN(s) of choice. In cases where the owner =
of the host is not willing to share their private key, other mechanisms =
that allow the owner to not share their private key are used, for =
example Keyless SSL [REF].</div><div><br class=3D""></div><div>CDNI by =
definition implies that a Content Provider=92s content will be delivered =
by CDNs other than the CDN with which the Content Provider has a direct =
business relationship. Therefore, while CDNI does not introduce any new =
technical requirements on dCDNs when establishing TLS sessions, Content =
Providers may be less willing to have their private key shared with =
dCDNs than they are with their chosen CDN(s) in a non-interconnected =
scenario.</div><div><br class=3D""></div><div>Mechanisms to distribute =
the required information and/or configuration to surrogates and request =
routers in dCDNs to enable a dCDN to successfully complete TLS =
handshakes and to perform encryption of the TLS channel for a particular =
host, such as private keys or the URI/IP address of a key server, are =
outside the scope of this document.</div><div><br =
class=3D""></div><div>[REF]&nbsp;<a =
href=3D"https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical=
-details/" =
class=3D"">https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-techni=
cal-details/</a></div></div><div =
class=3D"">=3D=3D=3DEND=3D=3D=3D</div></div></div><div><br =
class=3D""></div><div>Ben</div><div><br class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D""><br class=3D"">Jon Peterson<br =
class=3D"">Neustar, Inc.<br class=3D""><br =
class=3D""></div></blockquote></div><br class=3D""></div></body></html>=

--Apple-Mail=_12DB28E3-9E6F-43CC-8025-38149828C7A8--


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From: Kevin Ma J <kevin.j.ma@ericsson.com>
To: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>, "cdni@ietf.org" <cdni@ietf.org>
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From: "Peterson, Jon" <jon.peterson@neustar.biz>
To: Ben Niven-Jenkins <ben@niven-jenkins.co.uk>
Thread-Topic: [CDNi] Jon's commet on draft-ietf-cdni-redirection
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Date: Fri, 16 Oct 2015 23:12:36 +0000
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Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
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Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
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Jon,

> On 17 Oct 2015, at 00:12, Peterson, Jon <jon.peterson@neustar.biz> =
wrote:
>=20
> Of course it depends on what angle you look at the problem from, but =
if there's no problem with HTTPS redirection (302 over TLS from uCDN to =
dCDN), and no problem with DNS redirection with DNSSEC, but there is a =
problem when you do DNS redirection without DNSSEC, I would ordinarily =
locate the problem there.

Ah, OK, I think I=E2=80=99m starting to understand now. If I have =
understood correctly, what you would like is for the redirection =
interface to acknowledge that without DNSSEC a malicious DNS resolver =
could return DNS responses (IP addresses/CNAMEs/whatever) that steer the =
User Agent to a malicious server. DNSSEC would prevent that because =
responses would need to be signed and a malicious DNS resolver would =
therefore not be able to return malicious responses as it would not be =
able to generate properly signed DNS responses.

Do I have that correct?

If that=E2=80=99s the concern we can definitely include some text in the =
document about it.

However, that concern applies to HTTP & HTTPS redirection as well. If a =
CDN is performing HTTP redirection and the URI it is redirecting to =
contains a host (instead of an IP address) then DNS responses to resolve =
that host could also be hijacked by a malicious DNS resolver.

In the case of encrypted traffic, regardless of whether DNS based or =
HTTPS based redirects are used, if DNSSEC is not used then the DNS =
response hijacking problem still exists, except that when a User Agent =
tries to connect to the malicious server in the DNS response, the =
malicious server will not be able to deliver content to the User Agent =
as the malicious server will not be able to establish a TLS session with =
the User Agent.=20

However as the malicious DNS resolver is still able to steer traffic to =
a malicious server via a malicious DNS response, DNS response hijacking =
could still be used to mount what is effectively a DoS attack against =
the CDN/Content Provider. This is because the User Agent won=E2=80=99t =
be able to receive the content that it wants because it is being told to =
retrieve it from a server that it can=E2=80=99t establish a TLS session =
to.

Therefore, my suggestion would be that we include some text saying that =
if DNSSEC is not used, then there is the possibility that domains used =
for redirection (whether that is DNS redirection, HTTP redirection or =
HTTPS redirection) could have their DNS responses hijacked and bad =
things could result. The type of number of bad things a malicious actor =
could do is much greater with HTTP traffic than with HTTPS traffic but =
for HTTPS traffic the number of bad things a malicious actor could =
achieve is not zero, but they are limited to DoS rather than injection =
of their own content.

If you agree with the above I can propose some text to describe the =
problem.
=20
> The insecurity of redirecting with the DNS (in the absence of DNSSEC) =
is moreover a problem much bigger than CDNs. There was a draft a few =
years ago called the "HARD problem" draft, where "HARD" stood for "high =
assurance re-direction" that looked at this as a general problem =
involving applications beyond HTTP like XMPP, and noting that it =
happened for resource records like SRV beyond CNAME. It has been a known =
issue for a variety of virtual hosting architectures, which have =
properties similar to CDN interconnection, for some time. I have a tough =
time understanding why we wouldn't want to acknowledge it as the problem =
here.  Saying the problem is the difficulty in getting keys to establish =
a TLS connection is to me sort of like saying the problem with being =
tied to a stone at the bottom of a lake is that you don't have a scuba =
tank.
>=20
> But really, this was an offhand remark at a mic. If no else cares, do =
what you'd like over my objections. I think the new proposed text is =
more helpful to implementers, but it is solution text rather than =
problem text, and does not differentiate the situation for HTTPS and =
insecure DNS, so it doesn't address my concern.

I=E2=80=99d like to document the issues that affect CDNI redirection. =
The challenge for me in doing this is that I do not know what all those =
problems are and there has not been a clear description of the =
problem(s) to work off so I=E2=80=99m having to infer what they are =
(that comment is not aimed at you in particular, the two drafts on this =
topic do not provide a clear problem description IMO).

I also think there may be a mis-connect because I believe the problem =
you are trying to highlight applies to all redirection methods (DNS, =
HTTP & HTTPS), and you seem to think it only applies to DNS based =
redirection.

Once we have the problem agreed, I can propose text to describe it.

Ben

>=20
> Jon Peterson
> Neustar, Inc.
>=20
> From: Ben Niven-Jenkins <ben@niven-jenkins.co.uk =
<mailto:ben@niven-jenkins.co.uk>>
> Date: Friday, October 16, 2015 at 10:40 AM
> To: Jon Peterson <jon.peterson@neustar.biz =
<mailto:jon.peterson@neustar.biz>>
> Cc: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com =
<mailto:flefauch@cisco.com>>, "cdni@ietf.org <mailto:cdni@ietf.org>" =
<cdni@ietf.org <mailto:cdni@ietf.org>>
> Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
>=20
> Hi Jon,
>=20
>> On 16 Oct 2015, at 17:06, Peterson, Jon <jon.peterson@neustar.biz =
<mailto:jon.peterson@neustar.biz>> wrote:
>>=20
>>=20
>>> How DNS redirection works is that the User Agent does a resolution =
for
>>> foo.example and it gets a response for foo.example. The fact a CNAME =
is
>>> present & resolved by the DNS resolver is invisible to the User =
Agent
>>> (evidenced by the fact the URL bar in the browser doesn=C2=B9t =
change domain
>>> name/hostname when DNS redirection is performed).
>>=20
>> It is certainly invisible to the browser when every dCDN holds the =
private
>> key of every uCDN that might redirect to it, as you stipulate below.
>=20
> I explained how it is done in the majority of cases today. That =
isn=E2=80=99t the only solution, Keyless SSL is another for example.
>=20
>> If
>> that is an operational requirement of the DNS redirection mechanism =
in
>> cdni-redirection, it needs to be made explicit.
>=20
> It=E2=80=99s not an operational requirement IMO, the operational =
requirement is that the dCDN is able to successfully complete the TLS =
handshake and to perform encryption (and decryption) of the TLS channel.
>=20
>> The proposed text just
>> says that "any surrogate or request router to which the User Agent is
>> redirected needs to be able to successfully complete the TLS =
handshake"
>> etc., which could be read to imply that as a solution, but not if you
>> don't understand what the problem is in the first place. I was asking =
that
>> this acknowledge the problem, not specify a solution.
>=20
> Good, that=E2=80=99s what we were trying to do, maybe the text we used =
needs some refinement to be better understandable to others but we =
worded it the way it is to explicitly avoid suggesting a solution.
>=20
>> Moreover, the substance of my comment was that the problem is =
different
>> for DNS redirection than it is for HTTPS redirection.
>=20
>> HTTPS redirection
>> shouldn't require every dCDN to have every uCDNs private keying =
material.
>> The proposed text treats this like the two methods have the same
>> properties.
>=20
> I think it may depend what angle you view the problem from. =46rom my =
angle of view the problem is that the dCDN needs to successfully =
complete the TLS handshake and to perform encryption of the TLS channel. =
What the dCDN needs in order to do that is the same in both cases: =
private keys, or some other mechanism such as Keyless SSL that will =
enable the dCDN to complete the handshake and encrypt/decrypt the =
traffic.
>=20
> The fact that for a lot of HTTPS 302 redirection cases the dCDN will =
be redirecting to a hostname under the dCDN=E2=80=99s control (but that =
is not guaranteed) may make being able to successfully complete the TLS =
handshake and to perform encryption of the TLS channel easier for the =
dCDN but it doesn=E2=80=99t change the basic problem of what the dCDN =
needs in order to do its job. And for (at least some) cases where the =
302 redirection is to a hostname not under control of the dCDN the =
properties are the same for both DNS & HTTPS 302 redirection.
>=20
>>> Therefore as long as the IP address(es) in the DNS response presents =
the
>>> correct certificate for foo.example and has the correct credentials =
(e.g.
>>> Private key for foo.example) to complete the TLS handshake &
>>> encrypt/decrypt traffic on that TLS session the User Agent will not
>>> complain. This is how DNS-based HTTPS redirection is done in CDNs =
today
>>> where typically a CSP will provide their certificate & private key =
to the
>>> CDN so the CDN can terminate TLS sessions successfully on the CSP=C2=B9=
s
>>> behalf. which means if HTTPS redirection is insecure for CDNI then =
HTTPS
>>> redirection used by CDNs in the wild today (without CDNI) is also
>>> insecure (which it isn=C2=B9t).
>>=20
>> Identifying a known workaround does not mean there isn't a problem. =
That
>> there is a workaround is proof there is a problem.
>=20
> I=E2=80=99m not sure I=E2=80=99d call the way that the majority of CDN =
delivered HTTPS traffic is delivered a workaround myself (I only =
described the most common mechanism, there are others mechanisms that =
don=E2=80=99t rely on sharing the private key and which are used in the =
wild, e.g. Keyless SSL).
>=20
> But that=E2=80=99s off-topic so let=E2=80=99s move on.
>=20
>>=20
>>> IMO I think the real problem is a different thing that
>>> draft-slovetskiy-cdni-https-delegation-approaches hints at without
>>> stating explicitly. That is how far will a CSP trust delegating its
>>> credentials (e.g. Private key) given that the consequences of =
leakage of
>>> those credentials are very bad. There are possible solutions to =
avoid the
>>> CSP having to distribute their credentials (e.g. Keyless SSL) but =
from
>>> the perspective of the redirection draft they=C2=B9re out of scope =
IMO.
>>=20
>> The fact that there are two drafts trying to improve the workaround =
does
>> not convince me that the problem isn't worth noting.
>=20
> The problem is worth noting, which is what we did, as noted above it =
seems our text needs more work.
>=20
> It is also worth noting IMO that neither of the two drafts actually =
describe or mention the problem we are discussing but merely hint at it =
and then attribute the cause of it to the presence of a CNAME in the =
call flow, rather than the true cause which is lack of ability of the =
dCDN to successfully complete the TLS handshake.
>=20
> Anyway, does this proposal get us closer to some text you=E2=80=99d be =
happy with?
>=20
> =3D=3D=3DOLD=3D=3D=3D
> The Redirection Interface defined in this document might be used to =
redirect a request where the User Agent will subsequently attempt to =
establish a TLS session with the Redirection Target.  In such a case, =
any surrogate or request router to which the User Agent is redirected =
needs to be able to successfully complete the TLS handshake and to =
perform encryption of the TLS channel.  Mechanisms to distribute the =
required information and/or configuration, such as private keys, to =
surrogates and request routers in dCDNs are outside the scope of this =
document.
> =3D=3D=3DNEW=3D=3D=3D
> The Redirection Interface defined in this document might be used to =
redirect a request where the User Agent will subsequently attempt to =
establish a TLS session with the Redirection Target. In such a case, any =
surrogate or request router to which the User Agent is redirected needs =
to be able to successfully complete the TLS handshake and to perform =
encryption of the TLS channel.
>=20
> The private key for the host in the RT is needed in order to =
successfully establish a TLS session. The most widespread mechanism =
currently used by (non-interconnected) CDNs is for the owner of the host =
in the RT sharing their private key with their CDN(s) of choice. In =
cases where the owner of the host is not willing to share their private =
key, other mechanisms that allow the owner to not share their private =
key are used, for example Keyless SSL [REF].
>=20
> CDNI by definition implies that a Content Provider=E2=80=99s content =
will be delivered by CDNs other than the CDN with which the Content =
Provider has a direct business relationship. Therefore, while CDNI does =
not introduce any new technical requirements on dCDNs when establishing =
TLS sessions, Content Providers may be less willing to have their =
private key shared with dCDNs than they are with their chosen CDN(s) in =
a non-interconnected scenario.
>=20
> Mechanisms to distribute the required information and/or configuration =
to surrogates and request routers in dCDNs to enable a dCDN to =
successfully complete TLS handshakes and to perform encryption of the =
TLS channel for a particular host, such as private keys or the URI/IP =
address of a key server, are outside the scope of this document.
>=20
> [REF] =
https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical-details=
/ =
<https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical-detail=
s/>
> =3D=3D=3DEND=3D=3D=3D
>=20
> Ben
>=20
>>=20
>> Jon Peterson
>> Neustar, Inc.
>>=20
>=20


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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; -webkit-line-break: after-white-space;" =
class=3D"">Jon,<div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On 17 Oct 2015, at 00:12, =
Peterson, Jon &lt;<a href=3D"mailto:jon.peterson@neustar.biz" =
class=3D"">jon.peterson@neustar.biz</a>&gt; wrote:</div><div =
class=3D""><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; font-size: 14px; =
font-family: Calibri, sans-serif;" class=3D""><div class=3D""><br =
class=3D"">
</div>
<div class=3D"">Of course it depends on what angle you look at the =
problem from, but if there's no problem with HTTPS redirection (302 over =
TLS from uCDN to dCDN), and no problem with DNS redirection with DNSSEC, =
but there is a problem when you do DNS redirection without
 DNSSEC, I would ordinarily locate the problem =
there.</div></div></div></blockquote><div><br class=3D""></div>Ah, OK, I =
think I=E2=80=99m starting to understand now. If I have understood =
correctly, what you would like is for the redirection interface to =
acknowledge that without DNSSEC a malicious DNS resolver could return =
DNS responses (IP addresses/CNAMEs/whatever) that steer the User Agent =
to a malicious server. DNSSEC would prevent that because responses would =
need to be signed and a malicious DNS resolver would therefore not be =
able to return malicious responses as it would not be able to generate =
properly signed DNS responses.</div><div><br class=3D""></div><div>Do I =
have that correct?</div><div><br class=3D""></div><div>If that=E2=80=99s =
the concern we can definitely include some text in the document about =
it.</div><div><br class=3D""></div><div>However, that concern applies to =
HTTP &amp; HTTPS redirection as well. If a CDN is performing HTTP =
redirection and the URI it is redirecting to contains a host (instead of =
an IP address) then DNS responses to resolve that host could also be =
hijacked by a malicious DNS resolver.</div><div><br =
class=3D""></div><div>In the case of encrypted traffic, regardless of =
whether DNS based or HTTPS based redirects are used, if DNSSEC is not =
used then the DNS response hijacking problem still exists, except that =
when a User Agent tries to connect to the malicious server in the DNS =
response, the malicious server will not be able to deliver content to =
the User Agent as the malicious server will not be able to establish a =
TLS session with the User Agent.&nbsp;</div><div><br =
class=3D""></div><div>However as the malicious DNS resolver is still =
able to steer traffic to a malicious server via a malicious DNS =
response, DNS response hijacking could still be used to mount what is =
effectively a DoS attack against the CDN/Content Provider. This is =
because the User Agent won=E2=80=99t be able to receive the content that =
it wants because it is being told to retrieve it from a server that it =
can=E2=80=99t establish a TLS session to.</div><div><br =
class=3D""></div><div>Therefore, my suggestion would be that we include =
some text saying that if DNSSEC is not used, then there is the =
possibility that domains used for redirection (whether that is DNS =
redirection, HTTP redirection or HTTPS redirection) could have their DNS =
responses hijacked and bad things could result. The type of number of =
bad things a malicious actor could do is much greater with HTTP traffic =
than with HTTPS traffic but for HTTPS traffic the number of bad things a =
malicious actor could achieve is not zero, but they are limited to DoS =
rather than injection of their own content.</div><div><br =
class=3D""></div><div>If you agree with the above I can propose some =
text to describe the problem.</div><div>&nbsp;<br class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D""><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; font-size: 14px; font-family: Calibri, sans-serif;" =
class=3D"">

<div class=3D"">The insecurity of redirecting with the DNS (in the =
absence of DNSSEC) is moreover a problem much bigger than CDNs. There =
was a draft a few years ago called the "HARD problem" draft, where =
"HARD" stood for "high assurance re-direction" that looked at this
 as a general problem involving applications beyond HTTP like XMPP, and =
noting that it happened for resource records like SRV beyond CNAME. It =
has been a known issue for a variety of virtual hosting architectures, =
which have properties similar to CDN interconnection,
 for some time. I have a tough time understanding why we wouldn't want =
to acknowledge it as the problem here. &nbsp;Saying the problem is the =
difficulty in getting keys to establish a TLS connection is to me sort =
of like saying the problem with being tied to a stone
 at the bottom of a lake is that you don't have a scuba tank.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">But really, this was an offhand remark at a mic. If no =
else cares, do what you'd like over my objections. I think the new =
proposed text is more helpful to implementers, but it is solution text =
rather than problem text, and does not differentiate the situation
 for HTTPS and insecure DNS, so it doesn't address my =
concern.</div></div></div></blockquote><div><br class=3D""></div>I=E2=80=99=
d like to document the issues that affect CDNI redirection. The =
challenge for me in doing this is that I do not know what all those =
problems are and there has not been a clear description of the =
problem(s) to work off so I=E2=80=99m having to infer what they are =
(that comment is not aimed at you in particular, the two drafts on this =
topic do not provide a clear problem description IMO).</div><div><br =
class=3D""></div><div>I also think there may be a mis-connect because I =
believe the problem you are trying to highlight applies to all =
redirection methods (DNS, HTTP &amp; HTTPS), and you seem to think it =
only applies to DNS based redirection.</div><div><br =
class=3D""></div><div>Once we have the problem agreed, I can propose =
text to describe it.</div><div><br class=3D""></div><div>Ben</div><div><br=
 class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; font-size: 14px; font-family: =
Calibri, sans-serif;" class=3D"">
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Jon Peterson</div>
<div class=3D"">Neustar, Inc.</div>
<div class=3D""><br class=3D"">
</div>
<span id=3D"OLK_SRC_BODY_SECTION" class=3D"">
<div style=3D"font-family: Calibri; font-size: 11pt; text-align: left; =
border-width: 1pt medium medium; border-style: solid none none; padding: =
3pt 0in 0in; border-top-color: rgb(181, 196, 223);" class=3D"">
<span style=3D"font-weight:bold" class=3D"">From: </span>Ben =
Niven-Jenkins &lt;<a href=3D"mailto:ben@niven-jenkins.co.uk" =
class=3D"">ben@niven-jenkins.co.uk</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Date: </span>Friday, October =
16, 2015 at 10:40 AM<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">To: </span>Jon Peterson =
&lt;<a href=3D"mailto:jon.peterson@neustar.biz" =
class=3D"">jon.peterson@neustar.biz</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Cc: </span>"Francois Le =
Faucheur (flefauch)" &lt;<a href=3D"mailto:flefauch@cisco.com" =
class=3D"">flefauch@cisco.com</a>&gt;, "<a href=3D"mailto:cdni@ietf.org" =
class=3D"">cdni@ietf.org</a>" &lt;<a href=3D"mailto:cdni@ietf.org" =
class=3D"">cdni@ietf.org</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Subject: </span>Re: [CDNi] =
Jon's commet on draft-ietf-cdni-redirection<br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;" class=3D"">
Hi Jon,
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On 16 Oct 2015, at 17:06, Peterson, Jon &lt;<a =
href=3D"mailto:jon.peterson@neustar.biz" =
class=3D"">jon.peterson@neustar.biz</a>&gt; wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">How DNS redirection works is that =
the User Agent does a resolution for<br class=3D"">
foo.example and it gets a response for foo.example. The fact a CNAME =
is<br class=3D"">
present &amp; resolved by the DNS resolver is invisible to the User =
Agent<br class=3D"">
(evidenced by the fact the URL bar in the browser doesn=C2=B9t change =
domain<br class=3D"">
name/hostname when DNS redirection is performed).<br class=3D"">
</blockquote>
<br class=3D"">
It is certainly invisible to the browser when every dCDN holds the =
private<br class=3D"">
key of every uCDN that might redirect to it, as you stipulate =
below.</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
I explained how it is done in the majority of cases today. That isn=E2=80=99=
t the only solution, Keyless SSL is another for example.</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">If<br class=3D"">
that is an operational requirement of the DNS redirection mechanism =
in<br class=3D"">
cdni-redirection, it needs to be made explicit.</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
It=E2=80=99s not an operational requirement IMO, the operational =
requirement is that the dCDN is able to successfully complete the TLS =
handshake and to perform encryption (and decryption) of the TLS =
channel.</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">The proposed text just<br class=3D"">
says that "any surrogate or request router to which the User Agent is<br =
class=3D"">
redirected needs to be able to successfully complete the TLS =
handshake"<br class=3D"">
etc., which could be read to imply that as a solution, but not if you<br =
class=3D"">
don't understand what the problem is in the first place. I was asking =
that<br class=3D"">
this acknowledge the problem, not specify a solution.<br class=3D"">
</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
Good, that=E2=80=99s what we were trying to do, maybe the text we used =
needs some refinement to be better understandable to others but we =
worded it the way it is to explicitly avoid suggesting a solution.</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">Moreover, the substance of my comment was that the =
problem is different<br class=3D"">
for DNS redirection than it is for HTTPS redirection.</div>
</blockquote>
</div>
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">HTTPS redirection<br class=3D"">
shouldn't require every dCDN to have every uCDNs private keying =
material.<br class=3D"">
The proposed text treats this like the two methods have the same<br =
class=3D"">
properties.</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
I think it may depend what angle you view the problem from. =46rom my =
angle of view the problem is that the dCDN needs to successfully =
complete the TLS handshake and to perform encryption of the TLS channel. =
What the dCDN needs in order to do that is the same
 in both cases: private keys, or some other mechanism such as Keyless =
SSL that will enable the dCDN to complete the handshake and =
encrypt/decrypt the traffic.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">The fact that for a lot of HTTPS 302 redirection cases =
the dCDN will be redirecting to a hostname under the dCDN=E2=80=99s =
control (but that is not guaranteed) may make being able =
to&nbsp;successfully complete the TLS handshake and to perform =
encryption of the TLS
 channel easier for the dCDN but it doesn=E2=80=99t change the basic =
problem of what the dCDN needs in order to do its job. And for (at least =
some) cases where the 302 redirection is to a hostname not under control =
of the dCDN the properties are the same for both DNS
 &amp; HTTPS 302 redirection.</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">
<blockquote type=3D"cite" class=3D"">Therefore as long as the IP =
address(es) in the DNS response presents the<br class=3D"">
correct certificate for foo.example and has the correct credentials =
(e.g.<br class=3D"">
Private key for foo.example) to complete the TLS handshake &amp;<br =
class=3D"">
encrypt/decrypt traffic on that TLS session the User Agent will not<br =
class=3D"">
complain. This is how DNS-based HTTPS redirection is done in CDNs =
today<br class=3D"">
where typically a CSP will provide their certificate &amp; private key =
to the<br class=3D"">
CDN so the CDN can terminate TLS sessions successfully on the CSP=C2=B9s<b=
r class=3D"">
behalf. which means if HTTPS redirection is insecure for CDNI then =
HTTPS<br class=3D"">
redirection used by CDNs in the wild today (without CDNI) is also<br =
class=3D"">
insecure (which it isn=C2=B9t).<br class=3D"">
</blockquote>
<br class=3D"">
Identifying a known workaround does not mean there isn't a problem. =
That<br class=3D"">
there is a workaround is proof there is a problem.<br class=3D"">
</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
I=E2=80=99m not sure I=E2=80=99d call the way that the majority of CDN =
delivered HTTPS traffic is delivered a workaround myself (I only =
described the most common mechanism, there are others mechanisms that =
don=E2=80=99t rely on sharing the private key and which are used in the =
wild,
 e.g. Keyless SSL).</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">But that=E2=80=99s off-topic so let=E2=80=99s move =
on.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">IMO I think the real problem is a =
different thing that<br class=3D"">
draft-slovetskiy-cdni-https-delegation-approaches hints at without<br =
class=3D"">
stating explicitly. That is how far will a CSP trust delegating its<br =
class=3D"">
credentials (e.g. Private key) given that the consequences of leakage =
of<br class=3D"">
those credentials are very bad. There are possible solutions to avoid =
the<br class=3D"">
CSP having to distribute their credentials (e.g. Keyless SSL) but =
from<br class=3D"">
the perspective of the redirection draft they=C2=B9re out of scope =
IMO.<br class=3D"">
</blockquote>
<br class=3D"">
The fact that there are two drafts trying to improve the workaround =
does<br class=3D"">
not convince me that the problem isn't worth noting.<br class=3D"">
</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
The problem is worth noting, which is what we did, as noted above it =
seems our text needs more work.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">It is also worth noting IMO that neither of the two =
drafts actually describe or mention the problem we are discussing but =
merely hint at it and then attribute the cause of it to the presence of =
a CNAME in the call flow, rather than the true cause which
 is lack of ability of the dCDN to successfully complete the TLS =
handshake.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Anyway, does this proposal get us closer to some text =
you=E2=80=99d be happy with?</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">=3D=3D=3DOLD=3D=3D=3D</div>
<div class=3D"">
<div class=3D"">The Redirection Interface defined in this document might =
be used to redirect a request where the User Agent will subsequently =
attempt to establish a TLS session with the Redirection Target. &nbsp;In =
such a case, any surrogate or request router to which
 the User Agent is redirected needs to be able to successfully complete =
the TLS handshake and to perform encryption of the TLS channel. =
&nbsp;Mechanisms to distribute the required information and/or =
configuration, such as private keys, to surrogates and request
 routers in dCDNs are outside the scope of this document.</div>
<div class=3D"">=3D=3D=3DNEW=3D=3D=3D</div>
<div class=3D"">
<div class=3D"">
<div class=3D"">The Redirection Interface defined in this document might =
be used to redirect a request where the User Agent will subsequently =
attempt to establish a TLS session with the Redirection Target. In such =
a case, any surrogate or request router to which the User
 Agent is redirected needs to be able to successfully complete the TLS =
handshake and to perform encryption of the TLS channel.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">The private key for the host in the RT is needed in =
order to successfully establish a TLS session. The most widespread =
mechanism currently used by (non-interconnected) CDNs is for the owner =
of the host in the RT sharing their private key with their CDN(s)
 of choice. In cases where the owner of the host is not willing to share =
their private key, other mechanisms that allow the owner to not share =
their private key are used, for example Keyless SSL [REF].</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">CDNI by definition implies that a Content Provider=E2=80=99=
s content will be delivered by CDNs other than the CDN with which the =
Content Provider has a direct business relationship. Therefore, while =
CDNI does not introduce any new technical requirements on dCDNs
 when establishing TLS sessions, Content Providers may be less willing =
to have their private key shared with dCDNs than they are with their =
chosen CDN(s) in a non-interconnected scenario.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Mechanisms to distribute the required information and/or =
configuration to surrogates and request routers in dCDNs to enable a =
dCDN to successfully complete TLS handshakes and to perform encryption =
of the TLS channel for a particular host, such as private
 keys or the URI/IP address of a key server, are outside the scope of =
this document.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">[REF]&nbsp;<a =
href=3D"https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical=
-details/" =
class=3D"">https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-techni=
cal-details/</a></div>
</div>
<div class=3D"">=3D=3D=3DEND=3D=3D=3D</div>
</div>
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Ben</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D""><br class=3D"">
Jon Peterson<br class=3D"">
Neustar, Inc.<br class=3D"">
<br class=3D"">
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</div>
</div>
</span>
</div>

</div></blockquote></div><br class=3D""></div></body></html>=

--Apple-Mail=_A22E3252-FFF0-4A79-A2FC-08A27C39A87A--


From nobody Sat Oct 17 07:05:12 2015
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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 Content Delivery Networks Interconnection Working Group of the IETF.

        Title           : CDNI Control Interface / Triggers
        Authors         : Rob Murray
                          Ben Niven-Jenkins
	Filename        : draft-ietf-cdni-control-triggers-09.txt
	Pages           : 43
	Date            : 2015-10-17

Abstract:
   This document describes the part of the CDN Interconnection Control
   Interface that allows a CDN to trigger activity in an interconnected
   CDN that is configured to deliver content on its behalf.  The
   upstream CDN can use this mechanism to request that the downstream
   CDN pre-positions metadata or content, or that it invalidates or
   purges metadata or content.  The upstream CDN can monitor the status
   of activity that it has triggered in the downstream CDN.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-cdni-control-triggers/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-control-triggers-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-control-triggers-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/


From nobody Sat Oct 17 07:11:36 2015
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From: "Peterson, Jon" <jon.peterson@neustar.biz>
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From nobody Sun Oct 18 20:07:44 2015
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Subject: [CDNi] I-D Action: draft-ietf-cdni-footprint-capabilities-semantics-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 Content Delivery Networks Interconnection Working Group of the IETF.

        Title           : CDNI Request Routing: Footprint and Capabilities Semantics
        Authors         : Jan Seedorf
                          Jon Peterson
                          Stefano Previdi
                          Ray van Brandenburg
                          Kevin J. Ma
	Filename        : draft-ietf-cdni-footprint-capabilities-semantics-08.txt
	Pages           : 21
	Date            : 2015-10-18

Abstract:
   This document captures the semantics of the "Footprint and
   Capabilities Advertisement" part of the CDNI Request Routing
   interface, i.e., the desired meaning of "Footprint" and
   "Capabilities" in the CDNI context, and what the "Footprint and
   Capabilities Advertisement Interface (FCI)" offers within CDNI.  The
   document also provides guidelines for the CDNI FCI protocol.  It
   further defines a Base Advertisement Object, the necessary registries
   for capabilities and footprints, and guidelines how these registries
   may be extended in the future.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-cdni-footprint-capabilities-semantics/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-footprint-capabilities-semantics-08

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-footprint-capabilities-semantics-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/


From nobody Mon Oct 19 11:16:28 2015
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From: <frederic.fieau@orange.com>
To: "cdni@ietf.org" <cdni@ietf.org>
Thread-Topic: new version of draft-fieau-https-delivery-delegation
Thread-Index: AdEKmhCLa7AhQ9bZRpKpo0vV//oKFA==
Date: Mon, 19 Oct 2015 18:16:04 +0000
Message-ID: <23005_1445278565_56253365_23005_18168_1_1BD328329726EF4E91AE924BB1B4CB9E0FDEA09D@OPEXCLILMA1.corporate.adroot.infra.ftgroup>
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Subject: [CDNi] new version of draft-fieau-https-delivery-delegation
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Dear all,

A new version of the draft related to HTTPS delegation in CDNI (draft-fieau=
-https-delivery-delegation-01) has been posted.

Here are the major changes:

-       Merged the two drafts related to the HTTPS delegation in CDNI topic=
: draft-fieau-https-delivery-delegation (Fieau, Oprescu), with draft-slovet=
skiy-cdni-https-delegation-approaches (Slovetskiy)

-       Added a section on Keyless SSL

-       Clarified the HTTPS delegation issues in CDNI

-       Clarified the DNS redirection section

Thanks for your review,

Best regards,
Frederic

___________________________________________________________________________=
______________________________________________

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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;">Dear 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;Arial&quot;,&quot;sans-serif&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;Arial&quot;,&quot;sans-serif&quot;">A new version of the draft=
 related to HTTPS delegation in CDNI (draft-fieau-https-delivery-delegation=
-01) has been posted.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&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;Arial&quot;,&quot;sans-serif&quot;">Here are the major changes=
:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;"><span style=3D"mso-=
list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.0=
pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Merged the two dra=
fts related to the HTTPS delegation in CDNI topic: draft-fieau-https-delive=
ry-delegation (Fieau, Oprescu), with draft-slovetskiy-cdni-https-delegation=
-approaches
 (Slovetskiy)<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;"><span style=3D"mso-=
list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.0=
pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Added a section on=
 Keyless SSL
<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;"><span style=3D"mso-=
list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.0=
pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Clarified the HTTP=
S delegation issues in CDNI<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.0p=
t;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;"><span style=3D"mso-=
list:Ignore">-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.0=
pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;">Clarified the DNS =
redirection section<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&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;Arial&quot;,&quot;sans-serif&quot;">Thanks for your review,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&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;Arial&quot;,&quot;sans-serif&quot;">Best regards,<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;">Frederic<o:p></o:p></span>=
</p>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

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pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
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a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el=
ectroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.

This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;
they should not be distributed, used or copied without authorisation.
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</PRE></body>
</html>

--_000_1BD328329726EF4E91AE924BB1B4CB9E0FDEA09DOPEXCLILMA1corp_--


From nobody Mon Oct 19 11:50:48 2015
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Cc: cdni-chairs@ietf.org, The IESG <iesg@ietf.org>, barryleiba@gmail.com, draft-ietf-cdni-media-type@ietf.org, cdni@ietf.org, rfc-editor@rfc-editor.org
Subject: [CDNi] Document Action: 'CDNI Media Type Registration' to Informational RFC (draft-ietf-cdni-media-type-06.txt)
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The IESG has approved the following document:
- 'CDNI Media Type Registration'
  (draft-ietf-cdni-media-type-06.txt) as Informational RFC

This document is the product of the Content Delivery Networks
Interconnection Working Group.

The IESG contact persons are Ben Campbell, Barry Leiba and Alissa Cooper.

A URL of this Internet Draft is:
https://datatracker.ietf.org/doc/draft-ietf-cdni-media-type/




Technical Summary
This document defines the standard media type used by the Content
Delivery Network Interconnection (CDNI) protocol suite, including the
registration procedure and recommended usage of the required payload-
type parameter .

Review and Consensus
There is strong working group consensus in support of this document.
The document is very brief as it only requests allocation of a single media type
and creation of a corresponding payload-type parameter registry.  It has been
reviewed by multiple active members of the working group.  It has also been
reviewed by former AD Jon Peterson.

Personnel
Document Shepherd: Francois Le Faucheur
Responsible Area Director: Barry Leiba


From nobody Mon Oct 19 14:48:45 2015
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Subject: [CDNi] I-D Action: draft-ietf-cdni-metadata-12.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 Content Delivery Networks Interconnection Working Group of the IETF.

        Title           : CDN Interconnection Metadata
        Authors         : Ben Niven-Jenkins
                          Rob Murray
                          Matt Caulfield
                          Kevin J. Ma
	Filename        : draft-ietf-cdni-metadata-12.txt
	Pages           : 62
	Date            : 2015-10-19

Abstract:
   The Content Delivery Networks Interconnection (CDNI) metadata
   interface enables interconnected Content Delivery Networks (CDNs) to
   exchange content distribution metadata in order to enable content
   acquisition and delivery.  The CDNI metadata associated with a piece
   of content provides a downstream CDN with sufficient information for
   the downstream CDN to service content requests on behalf of an
   upstream CDN.  This document describes both a base set of CDNI
   metadata and the protocol for exchanging that metadata.



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

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-cdni-metadata-12

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-cdni-metadata-12


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 Mon Oct 19 15:49:44 2015
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Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
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Hi Jon,

> On 17 Oct 2015, at 19:09, Peterson, Jon <jon.peterson@neustar.biz> =
wrote:
>=20
> I wouldn't say the problem is that malicious attack, so much as it is =
a resolver's inability to distinguish normal redirection from an attack. =
DNSSEC lets you distinguish those things - if you get redirected to =
another domain, with DNSSEC you have a cryptographic assurance that the =
target domain sent you there, and without DNSSEC, you don't know if =
you're being redirected by the target domain or an attacker. Because =
DNSSEC is not widely available in the environments under consideration =
(yet), in practice this means that to get security for these =
applications when you do DNS redirection you end up doing the sorts of =
workarounds that you detailed in your last mail, the sorts of =
workarounds people are now trying to improve as HTTPS becomes more =
prevalent through measures like Keyless SSL.

Thanks for the great explanation. I understand why you see DNS as =
different to HTTPS redirection now :-)

> HTTPS redirection is different because the entity sending you the =
redirection (the 302) is sending it to you over TLS, when you've already =
established a security association and you have a cryptographic =
assurance that the redirection came from the target domain. An attacker =
who forges a DNS response to the original formation of that security =
association (as you try to dereference https://example.com =
<https://example.com/>) would simply result in that security association =
never being established. But in that case, you know it's an attack. =
That's what different - in the DNS you don't. So no, I think the =
situation is different for HTTPS redirection than for DNS redirection: =
in HTTPS redirection, it is clear when you receive the redirection =
response whether it came from an attacker or the target domain - you =
always know it was the target domain (to the degree you trust your =
crypto anyway).=20
>=20
> Yes, where we disagree is that I think specifying DNS as a redirection =
method has different security properties than specifying HTTPS as a =
redirection method. Doesn't mean there aren't workarounds to address =
DNS's situation, but I think eliding or skimming over these differences =
does implementers and future specifications a disservice - we should =
explain what they are.

I agree. I can have a go at some text for the case of DNS redirection of =
HTTPS traffic you describe above. Should we also leave in the text we =
already have (or the modified version I proposed)? And is it worth us =
adding text on the attack I describe below or do you think as it applies =
to all DNS resolutions in general it=E2=80=99s outside the scope of the =
redirection draft?

Thanks
Ben

> Now, it's not my intention here to burden the cdni-redirection =
document with detailing a solution for secure DNS redirection in the =
absence of DNSSEC. My mic comment merely suggested that, since people =
were talking about how to improve the workarounds, that describing the =
problem here seemed appropriate.
>=20
> Jon Peterson
> Neustar, Inc.
>=20
> From: Ben Niven-Jenkins <ben@niven-jenkins.co.uk =
<mailto:ben@niven-jenkins.co.uk>>
> Date: Saturday, October 17, 2015 at 4:44 AM
> To: Jon Peterson <jon.peterson@neustar.biz =
<mailto:jon.peterson@neustar.biz>>
> Cc: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com =
<mailto:flefauch@cisco.com>>, "cdni@ietf.org <mailto:cdni@ietf.org>" =
<cdni@ietf.org <mailto:cdni@ietf.org>>
> Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
>=20
> Jon,
>=20
>> On 17 Oct 2015, at 00:12, Peterson, Jon <jon.peterson@neustar.biz =
<mailto:jon.peterson@neustar.biz>> wrote:
>>=20
>> Of course it depends on what angle you look at the problem from, but =
if there's no problem with HTTPS redirection (302 over TLS from uCDN to =
dCDN), and no problem with DNS redirection with DNSSEC, but there is a =
problem when you do DNS redirection without DNSSEC, I would ordinarily =
locate the problem there.
>=20
> Ah, OK, I think I=E2=80=99m starting to understand now. If I have =
understood correctly, what you would like is for the redirection =
interface to acknowledge that without DNSSEC a malicious DNS resolver =
could return DNS responses (IP addresses/CNAMEs/whatever) that steer the =
User Agent to a malicious server. DNSSEC would prevent that because =
responses would need to be signed and a malicious DNS resolver would =
therefore not be able to return malicious responses as it would not be =
able to generate properly signed DNS responses.
>=20
> Do I have that correct?
>=20
> If that=E2=80=99s the concern we can definitely include some text in =
the document about it.
>=20
> However, that concern applies to HTTP & HTTPS redirection as well. If =
a CDN is performing HTTP redirection and the URI it is redirecting to =
contains a host (instead of an IP address) then DNS responses to resolve =
that host could also be hijacked by a malicious DNS resolver.
>=20
> In the case of encrypted traffic, regardless of whether DNS based or =
HTTPS based redirects are used, if DNSSEC is not used then the DNS =
response hijacking problem still exists, except that when a User Agent =
tries to connect to the malicious server in the DNS response, the =
malicious server will not be able to deliver content to the User Agent =
as the malicious server will not be able to establish a TLS session with =
the User Agent.=20
>=20
> However as the malicious DNS resolver is still able to steer traffic =
to a malicious server via a malicious DNS response, DNS response =
hijacking could still be used to mount what is effectively a DoS attack =
against the CDN/Content Provider. This is because the User Agent won=E2=80=
=99t be able to receive the content that it wants because it is being =
told to retrieve it from a server that it can=E2=80=99t establish a TLS =
session to.
>=20
> Therefore, my suggestion would be that we include some text saying =
that if DNSSEC is not used, then there is the possibility that domains =
used for redirection (whether that is DNS redirection, HTTP redirection =
or HTTPS redirection) could have their DNS responses hijacked and bad =
things could result. The type of number of bad things a malicious actor =
could do is much greater with HTTP traffic than with HTTPS traffic but =
for HTTPS traffic the number of bad things a malicious actor could =
achieve is not zero, but they are limited to DoS rather than injection =
of their own content.
>=20
> If you agree with the above I can propose some text to describe the =
problem.
> =20
>> The insecurity of redirecting with the DNS (in the absence of DNSSEC) =
is moreover a problem much bigger than CDNs. There was a draft a few =
years ago called the "HARD problem" draft, where "HARD" stood for "high =
assurance re-direction" that looked at this as a general problem =
involving applications beyond HTTP like XMPP, and noting that it =
happened for resource records like SRV beyond CNAME. It has been a known =
issue for a variety of virtual hosting architectures, which have =
properties similar to CDN interconnection, for some time. I have a tough =
time understanding why we wouldn't want to acknowledge it as the problem =
here.  Saying the problem is the difficulty in getting keys to establish =
a TLS connection is to me sort of like saying the problem with being =
tied to a stone at the bottom of a lake is that you don't have a scuba =
tank.
>>=20
>> But really, this was an offhand remark at a mic. If no else cares, do =
what you'd like over my objections. I think the new proposed text is =
more helpful to implementers, but it is solution text rather than =
problem text, and does not differentiate the situation for HTTPS and =
insecure DNS, so it doesn't address my concern.
>=20
> I=E2=80=99d like to document the issues that affect CDNI redirection. =
The challenge for me in doing this is that I do not know what all those =
problems are and there has not been a clear description of the =
problem(s) to work off so I=E2=80=99m having to infer what they are =
(that comment is not aimed at you in particular, the two drafts on this =
topic do not provide a clear problem description IMO).
>=20
> I also think there may be a mis-connect because I believe the problem =
you are trying to highlight applies to all redirection methods (DNS, =
HTTP & HTTPS), and you seem to think it only applies to DNS based =
redirection.
>=20
> Once we have the problem agreed, I can propose text to describe it.
>=20
> Ben
>=20
>>=20
>> Jon Peterson
>> Neustar, Inc.
>>=20
>> From: Ben Niven-Jenkins <ben@niven-jenkins.co.uk =
<mailto:ben@niven-jenkins.co.uk>>
>> Date: Friday, October 16, 2015 at 10:40 AM
>> To: Jon Peterson <jon.peterson@neustar.biz =
<mailto:jon.peterson@neustar.biz>>
>> Cc: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com =
<mailto:flefauch@cisco.com>>, "cdni@ietf.org <mailto:cdni@ietf.org>" =
<cdni@ietf.org <mailto:cdni@ietf.org>>
>> Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
>>=20
>> Hi Jon,
>>=20
>>> On 16 Oct 2015, at 17:06, Peterson, Jon <jon.peterson@neustar.biz =
<mailto:jon.peterson@neustar.biz>> wrote:
>>>=20
>>>=20
>>>> How DNS redirection works is that the User Agent does a resolution =
for
>>>> foo.example and it gets a response for foo.example. The fact a =
CNAME is
>>>> present & resolved by the DNS resolver is invisible to the User =
Agent
>>>> (evidenced by the fact the URL bar in the browser doesn=C2=B9t =
change domain
>>>> name/hostname when DNS redirection is performed).
>>>=20
>>> It is certainly invisible to the browser when every dCDN holds the =
private
>>> key of every uCDN that might redirect to it, as you stipulate below.
>>=20
>> I explained how it is done in the majority of cases today. That =
isn=E2=80=99t the only solution, Keyless SSL is another for example.
>>=20
>>> If
>>> that is an operational requirement of the DNS redirection mechanism =
in
>>> cdni-redirection, it needs to be made explicit.
>>=20
>> It=E2=80=99s not an operational requirement IMO, the operational =
requirement is that the dCDN is able to successfully complete the TLS =
handshake and to perform encryption (and decryption) of the TLS channel.
>>=20
>>> The proposed text just
>>> says that "any surrogate or request router to which the User Agent =
is
>>> redirected needs to be able to successfully complete the TLS =
handshake"
>>> etc., which could be read to imply that as a solution, but not if =
you
>>> don't understand what the problem is in the first place. I was =
asking that
>>> this acknowledge the problem, not specify a solution.
>>=20
>> Good, that=E2=80=99s what we were trying to do, maybe the text we =
used needs some refinement to be better understandable to others but we =
worded it the way it is to explicitly avoid suggesting a solution.
>>=20
>>> Moreover, the substance of my comment was that the problem is =
different
>>> for DNS redirection than it is for HTTPS redirection.
>>=20
>>> HTTPS redirection
>>> shouldn't require every dCDN to have every uCDNs private keying =
material.
>>> The proposed text treats this like the two methods have the same
>>> properties.
>>=20
>> I think it may depend what angle you view the problem from. =46rom my =
angle of view the problem is that the dCDN needs to successfully =
complete the TLS handshake and to perform encryption of the TLS channel. =
What the dCDN needs in order to do that is the same in both cases: =
private keys, or some other mechanism such as Keyless SSL that will =
enable the dCDN to complete the handshake and encrypt/decrypt the =
traffic.
>>=20
>> The fact that for a lot of HTTPS 302 redirection cases the dCDN will =
be redirecting to a hostname under the dCDN=E2=80=99s control (but that =
is not guaranteed) may make being able to successfully complete the TLS =
handshake and to perform encryption of  the TLS channel easier for the =
dCDN but it doesn=E2=80=99t change the basic problem of what the dCDN =
needs in order to do its job. And for (at least some) cases where the =
302 redirection is to a hostname not under control of the dCDN the =
properties are the same for both DNS & HTTPS 302 redirection.
>>=20
>>>> Therefore as long as the IP address(es) in the DNS response =
presents the
>>>> correct certificate for foo.example and has the correct credentials =
(e.g.
>>>> Private key for foo.example) to complete the TLS handshake &
>>>> encrypt/decrypt traffic on that TLS session the User Agent will not
>>>> complain. This is how DNS-based HTTPS redirection is done in CDNs =
today
>>>> where typically a CSP will provide their certificate & private key =
to the
>>>> CDN so the CDN can terminate TLS sessions successfully on the =
CSP=C2=B9s
>>>> behalf. which means if HTTPS redirection is insecure for CDNI then =
HTTPS
>>>> redirection used by CDNs in the wild today (without CDNI) is also
>>>> insecure (which it isn=C2=B9t).
>>>=20
>>> Identifying a known workaround does not mean there isn't a problem. =
That
>>> there is a workaround is proof there is a problem.
>>=20
>> I=E2=80=99m not sure I=E2=80=99d call the way that the majority of =
CDN delivered HTTPS traffic is delivered a workaround myself (I only =
described the most common mechanism, there are others mechanisms that =
don=E2=80=99t rely on sharing the private key and which are used in the =
wild, e.g. Keyless SSL).
>>=20
>> But that=E2=80=99s off-topic so let=E2=80=99s move on.
>>=20
>>>=20
>>>> IMO I think the real problem is a different thing that
>>>> draft-slovetskiy-cdni-https-delegation-approaches hints at without
>>>> stating explicitly. That is how far will a CSP trust delegating its
>>>> credentials (e.g. Private key) given that the consequences of =
leakage of
>>>> those credentials are very bad. There are possible solutions to =
avoid the
>>>> CSP having to distribute their credentials (e.g. Keyless SSL) but =
from
>>>> the perspective of the redirection draft they=C2=B9re out of scope =
IMO.
>>>=20
>>> The fact that there are two drafts trying to improve the workaround =
does
>>> not convince me that the problem isn't worth noting.
>>=20
>> The problem is worth noting, which is what we did, as noted above it =
seems our text needs more work.
>>=20
>> It is also worth noting IMO that neither of the two drafts actually =
describe or mention the problem we are discussing but merely hint at it =
and then attribute the cause of it to the presence of a CNAME in the =
call flow, rather than the true cause which is lack of ability of the =
dCDN to successfully complete the TLS handshake.
>>=20
>> Anyway, does this proposal get us closer to some text you=E2=80=99d =
be happy with?
>>=20
>> =3D=3D=3DOLD=3D=3D=3D
>> The Redirection Interface defined in this document might be used to =
redirect a request where the User Agent will subsequently attempt to =
establish a TLS session with the Redirection Target.  In such a case, =
any surrogate or request router to which the User Agent is redirected =
needs to be able to successfully complete the TLS handshake and to =
perform encryption of the TLS channel.  Mechanisms to distribute the =
required information and/or configuration, such as private keys, to =
surrogates and request routers in dCDNs are outside the scope of this =
document.
>> =3D=3D=3DNEW=3D=3D=3D
>> The Redirection Interface defined in this document might be used to =
redirect a request where the User Agent will subsequently attempt to =
establish a TLS session with the Redirection Target. In such a case, any =
surrogate or request router to which the User Agent is redirected needs =
to be able to successfully complete the TLS handshake and to perform =
encryption of the TLS channel.
>>=20
>> The private key for the host in the RT is needed in order to =
successfully establish a TLS session. The most widespread mechanism =
currently used by (non-interconnected) CDNs is for the owner of the host =
in the RT sharing their private key with  their CDN(s) of choice. In =
cases where the owner of the host is not willing to share their private =
key, other mechanisms that allow the owner to not share their private =
key are used, for example Keyless SSL [REF].
>>=20
>> CDNI by definition implies that a Content Provider=E2=80=99s content =
will be delivered by CDNs other than the CDN with which the Content =
Provider has a direct business relationship. Therefore, while CDNI does =
not introduce any new technical requirements on dCDNs when establishing =
TLS sessions, Content Providers may be less willing to have their =
private key shared with dCDNs than they are with their chosen CDN(s) in =
a non-interconnected scenario.
>>=20
>> Mechanisms to distribute the required information and/or =
configuration to surrogates and request routers in dCDNs to enable a =
dCDN to successfully complete TLS handshakes and to perform encryption =
of the TLS channel for a particular host, such as private keys or the =
URI/IP address of a key server, are outside the scope of this document.
>>=20
>> [REF] =
https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical-details=
/ =
<https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical-detail=
s/>
>> =3D=3D=3DEND=3D=3D=3D
>>=20
>> Ben
>>=20
>>>=20
>>> Jon Peterson
>>> Neustar, Inc.
>>>=20
>>=20
>=20


--Apple-Mail=_0FC5F2CE-95D4-486E-9029-E00A4B402678
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; -webkit-line-break: after-white-space;" =
class=3D"">Hi Jon,<div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On 17 Oct 2015, at 19:09, =
Peterson, Jon &lt;<a href=3D"mailto:jon.peterson@neustar.biz" =
class=3D"">jon.peterson@neustar.biz</a>&gt; wrote:</div><div =
class=3D""><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space; font-size: 14px; =
font-family: Calibri, sans-serif;" class=3D""><div class=3D""><br =
class=3D"">
</div>
<div class=3D"">I wouldn't say the problem is that malicious attack, so =
much as it is a resolver's inability to distinguish normal redirection =
from an attack. DNSSEC lets you distinguish those things - if you get =
redirected to another domain, with DNSSEC you have a cryptographic
 assurance that the target domain sent you there, and without DNSSEC, =
you don't know if you're being redirected by the target domain or an =
attacker. Because DNSSEC is not widely available in the environments =
under consideration (yet), in practice this means
 that to get security for these applications when you do DNS redirection =
you end up doing the sorts of workarounds that you detailed in your last =
mail, the sorts of workarounds people are now trying to improve as HTTPS =
becomes more prevalent through measures
 like Keyless SSL.</div></div></div></blockquote><div><br =
class=3D""></div>Thanks for the great explanation. I understand why you =
see DNS as different to HTTPS redirection now :-)</div><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; font-size: 14px; font-family: =
Calibri, sans-serif;" class=3D"">

<div class=3D"">HTTPS redirection is different because the entity =
sending you the redirection (the 302) is sending it to you over TLS, =
when you've already established a security association and you have a =
cryptographic assurance that the redirection came from the target
 domain. An attacker who forges a DNS response to the original formation =
of that security association (as you try to dereference
<a href=3D"https://example.com/" class=3D"">https://example.com</a>) =
would simply result in that security association never being =
established. But in that case, you know it's an attack. That's what =
different - in the DNS you don't. So no, I think the situation is =
different
 for HTTPS redirection than for DNS redirection: in HTTPS redirection, =
it is clear when you receive the redirection response whether it came =
from an attacker or the target domain - you always know it was the =
target domain (to the degree you trust your crypto
 anyway).&nbsp;</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Yes, where we disagree is that I think specifying DNS as =
a redirection method has different security properties than specifying =
HTTPS as a redirection method. Doesn't mean there aren't workarounds to =
address DNS's situation, but I think eliding or skimming
 over these differences does implementers and future specifications a =
disservice - we should explain what they are. =
</div></div></div></blockquote><div><br class=3D""></div>I agree. I can =
have a go at some text for the case of DNS redirection of HTTPS traffic =
you describe above. Should we also leave in the text we already have (or =
the modified version I proposed)? And is it worth us adding text on the =
attack I describe below or do you think as it applies to all DNS =
resolutions in general it=E2=80=99s outside the scope of the redirection =
draft?</div><div><br =
class=3D""></div><div>Thanks</div><div>Ben</div><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; font-size: 14px; font-family: =
Calibri, sans-serif;" class=3D""><div class=3D"">Now, it's not my =
intention here to burden the cdni-redirection document with detailing a =
solution for secure DNS redirection in the absence of
 DNSSEC. My mic comment merely suggested that, since people were talking =
about how to improve the workarounds, that describing the problem here =
seemed appropriate.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Jon Peterson</div>
<div class=3D"">Neustar, Inc.</div>
<div class=3D""><br class=3D"">
</div>
<span id=3D"OLK_SRC_BODY_SECTION" class=3D"">
<div style=3D"font-family: Calibri; font-size: 11pt; text-align: left; =
border-width: 1pt medium medium; border-style: solid none none; padding: =
3pt 0in 0in; border-top-color: rgb(181, 196, 223);" class=3D"">
<span style=3D"font-weight:bold" class=3D"">From: </span>Ben =
Niven-Jenkins &lt;<a href=3D"mailto:ben@niven-jenkins.co.uk" =
class=3D"">ben@niven-jenkins.co.uk</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Date: </span>Saturday, =
October 17, 2015 at 4:44 AM<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">To: </span>Jon Peterson =
&lt;<a href=3D"mailto:jon.peterson@neustar.biz" =
class=3D"">jon.peterson@neustar.biz</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Cc: </span>"Francois Le =
Faucheur (flefauch)" &lt;<a href=3D"mailto:flefauch@cisco.com" =
class=3D"">flefauch@cisco.com</a>&gt;, "<a href=3D"mailto:cdni@ietf.org" =
class=3D"">cdni@ietf.org</a>" &lt;<a href=3D"mailto:cdni@ietf.org" =
class=3D"">cdni@ietf.org</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Subject: </span>Re: [CDNi] =
Jon's commet on draft-ietf-cdni-redirection<br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;" class=3D"">
Jon,
<div class=3D""><br class=3D"">
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On 17 Oct 2015, at 00:12, Peterson, Jon &lt;<a =
href=3D"mailto:jon.peterson@neustar.biz" =
class=3D"">jon.peterson@neustar.biz</a>&gt; wrote:</div>
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; font-size: 14px; font-family: =
Calibri, sans-serif;" class=3D"">
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Of course it depends on what angle you look at the =
problem from, but if there's no problem with HTTPS redirection (302 over =
TLS from uCDN to dCDN), and no problem with DNS redirection with DNSSEC, =
but there is a problem when you do DNS redirection
 without DNSSEC, I would ordinarily locate the problem there.</div>
</div>
</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
Ah, OK, I think I=E2=80=99m starting to understand now. If I have =
understood correctly, what you would like is for the redirection =
interface to acknowledge that without DNSSEC a malicious DNS resolver =
could return DNS responses (IP addresses/CNAMEs/whatever) that steer
 the User Agent to a malicious server. DNSSEC would prevent that because =
responses would need to be signed and a malicious DNS resolver would =
therefore not be able to return malicious responses as it would not be =
able to generate properly signed DNS responses.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Do I have that correct?</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">If that=E2=80=99s the concern we can definitely include =
some text in the document about it.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">However, that concern applies to HTTP &amp; HTTPS =
redirection as well. If a CDN is performing HTTP redirection and the URI =
it is redirecting to contains a host (instead of an IP address) then DNS =
responses to resolve that host could also be hijacked by a malicious
 DNS resolver.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">In the case of encrypted traffic, regardless of whether =
DNS based or HTTPS based redirects are used, if DNSSEC is not used then =
the DNS response hijacking problem still exists, except that when a User =
Agent tries to connect to the malicious server in the
 DNS response, the malicious server will not be able to deliver content =
to the User Agent as the malicious server will not be able to establish =
a TLS session with the User Agent.&nbsp;</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">However as the malicious DNS resolver is still able to =
steer traffic to a malicious server via a malicious DNS response, DNS =
response hijacking could still be used to mount what is effectively a =
DoS attack against the CDN/Content Provider. This is because
 the User Agent won=E2=80=99t be able to receive the content that it =
wants because it is being told to retrieve it from a server that it =
can=E2=80=99t establish a TLS session to.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Therefore, my suggestion would be that we include some =
text saying that if DNSSEC is not used, then there is the possibility =
that domains used for redirection (whether that is DNS redirection, HTTP =
redirection or HTTPS redirection) could have their DNS
 responses hijacked and bad things could result. The type of number of =
bad things a malicious actor could do is much greater with HTTP traffic =
than with HTTPS traffic but for HTTPS traffic the number of bad things a =
malicious actor could achieve is not zero,
 but they are limited to DoS rather than injection of their own =
content.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">If you agree with the above I can propose some text to =
describe the problem.</div>
<div class=3D"">&nbsp;<br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; font-size: 14px; font-family: =
Calibri, sans-serif;" class=3D"">
<div class=3D"">The insecurity of redirecting with the DNS (in the =
absence of DNSSEC) is moreover a problem much bigger than CDNs. There =
was a draft a few years ago called the "HARD problem" draft, where =
"HARD" stood for "high assurance re-direction" that looked
 at this as a general problem involving applications beyond HTTP like =
XMPP, and noting that it happened for resource records like SRV beyond =
CNAME. It has been a known issue for a variety of virtual hosting =
architectures, which have properties similar to CDN
 interconnection, for some time. I have a tough time understanding why =
we wouldn't want to acknowledge it as the problem here. &nbsp;Saying the =
problem is the difficulty in getting keys to establish a TLS connection =
is to me sort of like saying the problem with
 being tied to a stone at the bottom of a lake is that you don't have a =
scuba tank.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">But really, this was an offhand remark at a mic. If no =
else cares, do what you'd like over my objections. I think the new =
proposed text is more helpful to implementers, but it is solution text =
rather than problem text, and does not differentiate
 the situation for HTTPS and insecure DNS, so it doesn't address my =
concern.</div>
</div>
</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
I=E2=80=99d like to document the issues that affect CDNI redirection. =
The challenge for me in doing this is that I do not know what all those =
problems are and there has not been a clear description of the =
problem(s) to work off so I=E2=80=99m having to infer what they are
 (that comment is not aimed at you in particular, the two drafts on this =
topic do not provide a clear problem description IMO).</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">I also think there may be a mis-connect because I =
believe the problem you are trying to highlight applies to all =
redirection methods (DNS, HTTP &amp; HTTPS), and you seem to think it =
only applies to DNS based redirection.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Once we have the problem agreed, I can propose text to =
describe it.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Ben</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; font-size: 14px; font-family: =
Calibri, sans-serif;" class=3D"">
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Jon Peterson</div>
<div class=3D"">Neustar, Inc.</div>
<div class=3D""><br class=3D"">
</div>
<span id=3D"OLK_SRC_BODY_SECTION" class=3D"">
<div style=3D"font-family: Calibri; font-size: 11pt; text-align: left; =
border-width: 1pt medium medium; border-style: solid none none; padding: =
3pt 0in 0in; border-top-color: rgb(181, 196, 223);" class=3D"">
<span style=3D"font-weight:bold" class=3D"">From: </span>Ben =
Niven-Jenkins &lt;<a href=3D"mailto:ben@niven-jenkins.co.uk" =
class=3D"">ben@niven-jenkins.co.uk</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Date: </span>Friday, October =
16, 2015 at 10:40 AM<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">To: </span>Jon Peterson =
&lt;<a href=3D"mailto:jon.peterson@neustar.biz" =
class=3D"">jon.peterson@neustar.biz</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Cc: </span>"Francois Le =
Faucheur (flefauch)" &lt;<a href=3D"mailto:flefauch@cisco.com" =
class=3D"">flefauch@cisco.com</a>&gt;, "<a href=3D"mailto:cdni@ietf.org" =
class=3D"">cdni@ietf.org</a>" &lt;<a href=3D"mailto:cdni@ietf.org" =
class=3D"">cdni@ietf.org</a>&gt;<br class=3D"">
<span style=3D"font-weight:bold" class=3D"">Subject: </span>Re: [CDNi] =
Jon's commet on draft-ietf-cdni-redirection<br class=3D"">
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;" class=3D"">
Hi Jon,
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On 16 Oct 2015, at 17:06, Peterson, Jon &lt;<a =
href=3D"mailto:jon.peterson@neustar.biz" =
class=3D"">jon.peterson@neustar.biz</a>&gt; wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">How DNS redirection works is that =
the User Agent does a resolution for<br class=3D"">
foo.example and it gets a response for foo.example. The fact a CNAME =
is<br class=3D"">
present &amp; resolved by the DNS resolver is invisible to the User =
Agent<br class=3D"">
(evidenced by the fact the URL bar in the browser doesn=C2=B9t change =
domain<br class=3D"">
name/hostname when DNS redirection is performed).<br class=3D"">
</blockquote>
<br class=3D"">
It is certainly invisible to the browser when every dCDN holds the =
private<br class=3D"">
key of every uCDN that might redirect to it, as you stipulate =
below.</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
I explained how it is done in the majority of cases today. That isn=E2=80=99=
t the only solution, Keyless SSL is another for example.</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">If<br class=3D"">
that is an operational requirement of the DNS redirection mechanism =
in<br class=3D"">
cdni-redirection, it needs to be made explicit.</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
It=E2=80=99s not an operational requirement IMO, the operational =
requirement is that the dCDN is able to successfully complete the TLS =
handshake and to perform encryption (and decryption) of the TLS =
channel.</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">The proposed text just<br class=3D"">
says that "any surrogate or request router to which the User Agent is<br =
class=3D"">
redirected needs to be able to successfully complete the TLS =
handshake"<br class=3D"">
etc., which could be read to imply that as a solution, but not if you<br =
class=3D"">
don't understand what the problem is in the first place. I was asking =
that<br class=3D"">
this acknowledge the problem, not specify a solution.<br class=3D"">
</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
Good, that=E2=80=99s what we were trying to do, maybe the text we used =
needs some refinement to be better understandable to others but we =
worded it the way it is to explicitly avoid suggesting a solution.</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">Moreover, the substance of my comment was that the =
problem is different<br class=3D"">
for DNS redirection than it is for HTTPS redirection.</div>
</blockquote>
</div>
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">HTTPS redirection<br class=3D"">
shouldn't require every dCDN to have every uCDNs private keying =
material.<br class=3D"">
The proposed text treats this like the two methods have the same<br =
class=3D"">
properties.</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
I think it may depend what angle you view the problem from. =46rom my =
angle of view the problem is that the dCDN needs to successfully =
complete the TLS handshake and to perform encryption of the TLS channel. =
What the dCDN needs in order to do that is the same
 in both cases: private keys, or some other mechanism such as Keyless =
SSL that will enable the dCDN to complete the handshake and =
encrypt/decrypt the traffic.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">The fact that for a lot of HTTPS 302 redirection cases =
the dCDN will be redirecting to a hostname under the dCDN=E2=80=99s =
control (but that is not guaranteed) may make being able =
to&nbsp;successfully complete the TLS handshake and to perform =
encryption of
 the TLS channel easier for the dCDN but it doesn=E2=80=99t change the =
basic problem of what the dCDN needs in order to do its job. And for (at =
least some) cases where the 302 redirection is to a hostname not under =
control of the dCDN the properties are the same for
 both DNS &amp; HTTPS 302 redirection.</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D"">
<blockquote type=3D"cite" class=3D"">Therefore as long as the IP =
address(es) in the DNS response presents the<br class=3D"">
correct certificate for foo.example and has the correct credentials =
(e.g.<br class=3D"">
Private key for foo.example) to complete the TLS handshake &amp;<br =
class=3D"">
encrypt/decrypt traffic on that TLS session the User Agent will not<br =
class=3D"">
complain. This is how DNS-based HTTPS redirection is done in CDNs =
today<br class=3D"">
where typically a CSP will provide their certificate &amp; private key =
to the<br class=3D"">
CDN so the CDN can terminate TLS sessions successfully on the CSP=C2=B9s<b=
r class=3D"">
behalf. which means if HTTPS redirection is insecure for CDNI then =
HTTPS<br class=3D"">
redirection used by CDNs in the wild today (without CDNI) is also<br =
class=3D"">
insecure (which it isn=C2=B9t).<br class=3D"">
</blockquote>
<br class=3D"">
Identifying a known workaround does not mean there isn't a problem. =
That<br class=3D"">
there is a workaround is proof there is a problem.<br class=3D"">
</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
I=E2=80=99m not sure I=E2=80=99d call the way that the majority of CDN =
delivered HTTPS traffic is delivered a workaround myself (I only =
described the most common mechanism, there are others mechanisms that =
don=E2=80=99t rely on sharing the private key and which are used in the =
wild,
 e.g. Keyless SSL).</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">But that=E2=80=99s off-topic so let=E2=80=99s move =
on.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">IMO I think the real problem is a =
different thing that<br class=3D"">
draft-slovetskiy-cdni-https-delegation-approaches hints at without<br =
class=3D"">
stating explicitly. That is how far will a CSP trust delegating its<br =
class=3D"">
credentials (e.g. Private key) given that the consequences of leakage =
of<br class=3D"">
those credentials are very bad. There are possible solutions to avoid =
the<br class=3D"">
CSP having to distribute their credentials (e.g. Keyless SSL) but =
from<br class=3D"">
the perspective of the redirection draft they=C2=B9re out of scope =
IMO.<br class=3D"">
</blockquote>
<br class=3D"">
The fact that there are two drafts trying to improve the workaround =
does<br class=3D"">
not convince me that the problem isn't worth noting.<br class=3D"">
</div>
</blockquote>
<div class=3D""><br class=3D"">
</div>
The problem is worth noting, which is what we did, as noted above it =
seems our text needs more work.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">It is also worth noting IMO that neither of the two =
drafts actually describe or mention the problem we are discussing but =
merely hint at it and then attribute the cause of it to the presence of =
a CNAME in the call flow, rather than the true cause
 which is lack of ability of the dCDN to successfully complete the TLS =
handshake.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Anyway, does this proposal get us closer to some text =
you=E2=80=99d be happy with?</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">=3D=3D=3DOLD=3D=3D=3D</div>
<div class=3D"">
<div class=3D"">The Redirection Interface defined in this document might =
be used to redirect a request where the User Agent will subsequently =
attempt to establish a TLS session with the Redirection Target. &nbsp;In =
such a case, any surrogate or request router to which
 the User Agent is redirected needs to be able to successfully complete =
the TLS handshake and to perform encryption of the TLS channel. =
&nbsp;Mechanisms to distribute the required information and/or =
configuration, such as private keys, to surrogates and request
 routers in dCDNs are outside the scope of this document.</div>
<div class=3D"">=3D=3D=3DNEW=3D=3D=3D</div>
<div class=3D"">
<div class=3D"">
<div class=3D"">The Redirection Interface defined in this document might =
be used to redirect a request where the User Agent will subsequently =
attempt to establish a TLS session with the Redirection Target. In such =
a case, any surrogate or request router to which
 the User Agent is redirected needs to be able to successfully complete =
the TLS handshake and to perform encryption of the TLS channel.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">The private key for the host in the RT is needed in =
order to successfully establish a TLS session. The most widespread =
mechanism currently used by (non-interconnected) CDNs is for the owner =
of the host in the RT sharing their private key with
 their CDN(s) of choice. In cases where the owner of the host is not =
willing to share their private key, other mechanisms that allow the =
owner to not share their private key are used, for example Keyless SSL =
[REF].</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">CDNI by definition implies that a Content Provider=E2=80=99=
s content will be delivered by CDNs other than the CDN with which the =
Content Provider has a direct business relationship. Therefore, while =
CDNI does not introduce any new technical requirements
 on dCDNs when establishing TLS sessions, Content Providers may be less =
willing to have their private key shared with dCDNs than they are with =
their chosen CDN(s) in a non-interconnected scenario.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Mechanisms to distribute the required information and/or =
configuration to surrogates and request routers in dCDNs to enable a =
dCDN to successfully complete TLS handshakes and to perform encryption =
of the TLS channel for a particular host, such
 as private keys or the URI/IP address of a key server, are outside the =
scope of this document.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">[REF]&nbsp;<a =
href=3D"https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical=
-details/" =
class=3D"">https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-techni=
cal-details/</a></div>
</div>
<div class=3D"">=3D=3D=3DEND=3D=3D=3D</div>
</div>
</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Ben</div>
<div class=3D""><br class=3D"">
<blockquote type=3D"cite" class=3D"">
<div class=3D""><br class=3D"">
Jon Peterson<br class=3D"">
Neustar, Inc.<br class=3D"">
<br class=3D"">
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</div>
</div>
</span></div>
</div>
</blockquote>
</div>
<br class=3D"">
</div>
</div>
</div>
</span>
</div>

</div></blockquote></div><br class=3D""></div></body></html>=

--Apple-Mail=_0FC5F2CE-95D4-486E-9029-E00A4B402678--


From nobody Fri Oct 23 00:02:44 2015
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From: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>
To: "cdni@ietf.org" <cdni@ietf.org>
Thread-Topic: IETF 94 CDNI WG Meeting - Slot Requests
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Hello,

Please unicast to Daryl and I your slot requests with draft name, duration =
requested and presenter name.

Cheers

Francois=


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To: Ben Niven-Jenkins <ben@niven-jenkins.co.uk>, "Peterson, Jon" <jon.peterson@neustar.biz>
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From: "Brandenburg, R. (Ray) van" <ray.vanbrandenburg@tno.nl>
To: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>, "cdni@ietf.org" <cdni@ietf.org>
Thread-Topic: [CDNi] Fwd: IPR Disclosure Juniper Networks, Inc.'s Statement about IPR related to draft-ietf-cdni-redirection
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Subject: Re: [CDNi] Fwd: IPR Disclosure Juniper Networks, Inc.'s Statement about IPR related to draft-ietf-cdni-redirection
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From: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>
To: "cdni@ietf.org" <cdni@ietf.org>
Thread-Topic: Draft agenda for Yokohama CDNI WG Meeting uploaded
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Subject: [CDNi] Draft agenda for Yokohama CDNI WG Meeting uploaded
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Folks,

Please review the draft agenda:
https://www.ietf.org/proceedings/94/agenda/agenda-94-cdni

Thanks

Francois

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e-break: after-white-space;" class=3D"">
<div class=3D"">Folks,</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Please review the draft agenda:</div>
<div class=3D""><a href=3D"https://www.ietf.org/proceedings/94/agenda/agend=
a-94-cdni" class=3D"">https://www.ietf.org/proceedings/94/agenda/agenda-94-=
cdni</a></div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Thanks</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Francois</div>
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From: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>
To: "cdni@ietf.org" <cdni@ietf.org>
Thread-Topic: Presentation Material for Yokohama
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Date: Mon, 26 Oct 2015 18:19:23 +0000
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Subject: [CDNi] Presentation Material for Yokohama
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To all presenters,

Please unicast to Daryl and I your draft presentations before the end of th=
e week, in any case by Sunday 1st November latest.

Thanks

Francois


On 26 Oct 2015, at 19:17, Francois Le Faucheur (flefauch) <flefauch@cisco.c=
om<mailto:flefauch@cisco.com>> wrote:

Folks,

Please review the draft agenda:
https://www.ietf.org/proceedings/94/agenda/agenda-94-cdni

Thanks

Francois


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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"">
<div class=3D"">To all presenters,</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Please unicast to Daryl and I your draft presentations befo=
re the end of the week, in any case by Sunday 1st November latest.</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Thanks</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Francois</div>
<div class=3D""><br class=3D"">
</div>
<br class=3D"">
<div>
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On 26 Oct 2015, at 19:17, Francois Le Faucheur (flefauch) &=
lt;<a href=3D"mailto:flefauch@cisco.com" class=3D"">flefauch@cisco.com</a>&=
gt; wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D"">
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space;" class=3D"">
<div class=3D"">Folks,</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Please review the draft agenda:</div>
<div class=3D""><a href=3D"https://www.ietf.org/proceedings/94/agenda/agend=
a-94-cdni" class=3D"">https://www.ietf.org/proceedings/94/agenda/agenda-94-=
cdni</a></div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Thanks</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D"">Francois</div>
</div>
</div>
</blockquote>
</div>
<br class=3D"">
</body>
</html>

--_000_0593BC0EAE784C219F4B54DA1DAD8117ciscocom_--


From nobody Tue Oct 27 06:14:32 2015
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From: Ben Niven-Jenkins <ben@niven-jenkins.co.uk>
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Subject: Re: [CDNi] Jon's commet on draft-ietf-cdni-redirection
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Hi Jon,

Would the following text address your comments, feel free to wordsmith =
it to your liking.

=3D=3D=3D
The redirection interface defined in this document enables a uCDN to =
return a DNS response on behalf of a dCDN. If DNSSEC is deployed User =
Agents can authenticate the DNS responses they receive, enabling them to =
distinguish between genuine responses (redirections) and malicious =
responses (redirections). Without DNSSEC a User Agent is unable to =
detect a malicious DNS redirect.  HTTPS redirection provides an =
additional layer of authentication via TLS because in order for the TLS =
handshake to complete, the server the User Agent connects to must =
authenticate itself to the User Agent.
=3D=3D=3D

Thanks
Ben





> On 22 Oct 2015, at 08:56, Ben Niven-Jenkins <ben@niven-jenkins.co.uk> =
wrote:
>=20
>>> The Redirection Interface defined in this document might be used to =
redirect a request where the User Agent will subsequently attempt to =
establish a TLS session with the Redirection Target. In such a case, any =
surrogate or request router to which the User Agent is redirected needs =
to be able to successfully complete the TLS handshake and to perform =
encryption of the TLS channel.
>>>=20
>>> The private key for the host in the RT is needed in order to =
successfully establish a TLS session. The most widespread mechanism =
currently used by (non-interconnected) CDNs is for the owner of the host =
in the RT sharing their private key with their CDN(s) of choice. In =
cases where the owner of the host is not willing to share their private =
key, other mechanisms that allow the owner to not share their private =
key are used, for example Keyless SSL [REF].
>>>=20
>>> CDNI by definition implies that a Content Provider=E2=80=99s content =
will be delivered by CDNs other than the CDN with which the Content =
Provider has a direct business relationship. Therefore, while CDNI does =
not introduce any new technical requirements on dCDNs when establishing =
TLS sessions, Content Providers may be less willing to have their =
private key shared with dCDNs than they are with their chosen CDN(s) in =
a non-interconnected scenario.
>>>=20
>>> Mechanisms to distribute the required information and/or =
configuration to surrogates and request routers in dCDNs to enable a =
dCDN to successfully complete TLS handshakes and to perform encryption =
of the TLS channel for a particular host, such as private keys or the =
URI/IP address of a key server, are outside the scope of this document.
>>>=20
>>> [REF] =
https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical-details=
/ =
<https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical-detail=
s/>

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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; -webkit-line-break: after-white-space;" =
class=3D"">Hi Jon,<div class=3D""><br class=3D""></div><div =
class=3D"">Would the following text address your comments, feel free to =
wordsmith it to your liking.</div><div class=3D""><br =
class=3D""></div><div class=3D"">=3D=3D=3D</div><div class=3D"">The =
redirection interface defined in this document enables a uCDN to return =
a DNS response on behalf of a dCDN. If DNSSEC&nbsp;is deployed User =
Agents can authenticate the DNS responses they receive, enabling them to =
distinguish between genuine&nbsp;responses (redirections) and malicious =
responses (redirections). Without DNSSEC a User Agent is unable to =
detect a&nbsp;malicious DNS redirect. &nbsp;HTTPS redirection provides =
an additional layer of authentication via TLS because in order for the =
TLS&nbsp;handshake to complete, the server the User Agent connects to =
must authenticate itself to the User Agent.<br =
class=3D""><div>=3D=3D=3D</div><div><br =
class=3D""></div><div>Thanks</div><div>Ben</div><div><br =
class=3D""></div><div><br class=3D""></div><div><br =
class=3D""></div><div><br class=3D""></div><div><br class=3D""><blockquote=
 type=3D"cite" class=3D""><div class=3D"">On 22 Oct 2015, at 08:56, Ben =
Niven-Jenkins &lt;<a href=3D"mailto:ben@niven-jenkins.co.uk" =
class=3D"">ben@niven-jenkins.co.uk</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><blockquote =
type=3D"cite" class=3D"" style=3D"font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant: normal; font-weight: normal; =
letter-spacing: normal; line-height: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div =
class=3D""><div class=3D"" style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
font-size: 14px; font-family: Calibri, sans-serif;"><span =
id=3D"OLK_SRC_BODY_SECTION" class=3D""><div class=3D""><div class=3D"" =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;"><div class=3D""><div =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""><div =
class=3D"" style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; font-size: 14px; font-family: =
Calibri, sans-serif;"><span id=3D"OLK_SRC_BODY_SECTION" class=3D""><div =
class=3D""><div class=3D"" style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div =
class=3D""><div class=3D""><div class=3D""><div class=3D""><div =
class=3D"">The Redirection Interface defined in this document might be =
used to redirect a request where the User Agent will subsequently =
attempt to establish a TLS session with the Redirection Target. In such =
a case, any surrogate or request router to which the User Agent is =
redirected needs to be able to successfully complete the TLS handshake =
and to perform encryption of the TLS channel.</div><div class=3D""><br =
class=3D""></div><div class=3D"">The private key for the host in the RT =
is needed in order to successfully establish a TLS session. The most =
widespread mechanism currently used by (non-interconnected) CDNs is for =
the owner of the host in the RT sharing their private key with their =
CDN(s) of choice. In cases where the owner of the host is not willing to =
share their private key, other mechanisms that allow the owner to not =
share their private key are used, for example Keyless SSL =
[REF].</div><div class=3D""><br class=3D""></div><div class=3D"">CDNI by =
definition implies that a Content Provider=E2=80=99s content will be =
delivered by CDNs other than the CDN with which the Content Provider has =
a direct business relationship. Therefore, while CDNI does not introduce =
any new technical requirements on dCDNs when establishing TLS sessions, =
Content Providers may be less willing to have their private key shared =
with dCDNs than they are with their chosen CDN(s) in a =
non-interconnected scenario.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Mechanisms to distribute the required =
information and/or configuration to surrogates and request routers in =
dCDNs to enable a dCDN to successfully complete TLS handshakes and to =
perform encryption of the TLS channel for a particular host, such as =
private keys or the URI/IP address of a key server, are outside the =
scope of this document.</div><div class=3D""><br class=3D""></div><div =
class=3D"">[REF]&nbsp;<a =
href=3D"https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-technical=
-details/" =
class=3D"">https://blog.cloudflare.com/keyless-ssl-the-nitty-gritty-techni=
cal-details/</a></div></div></div></div></div></div></div></span></div></d=
iv></blockquote></div></div></div></div></span></div></div></blockquote></=
div></blockquote></div><br class=3D""></div></body></html>=

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