Re: [conex] Stephen Farrell's No Objection on draft-ietf-conex-tcp-modifications-09: (with COMMENT)

Stephen Farrell <stephen.farrell@cs.tcd.ie> Fri, 09 October 2015 11:07 UTC

Return-Path: <stephen.farrell@cs.tcd.ie>
X-Original-To: conex@ietfa.amsl.com
Delivered-To: conex@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D3D511B360C; Fri, 9 Oct 2015 04:07:23 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.011
X-Spam-Level:
X-Spam-Status: No, score=-4.011 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, MIME_8BIT_HEADER=0.3, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pMJ1-YI_-xu3; Fri, 9 Oct 2015 04:07:21 -0700 (PDT)
Received: from mercury.scss.tcd.ie (mercury.scss.tcd.ie [134.226.56.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 74A171B3607; Fri, 9 Oct 2015 04:07:21 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1]) by mercury.scss.tcd.ie (Postfix) with ESMTP id 1F37DBE59; Fri, 9 Oct 2015 12:07:20 +0100 (IST)
Received: from mercury.scss.tcd.ie ([127.0.0.1]) by localhost (mercury.scss.tcd.ie [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id OX6_5JcTiw7f; Fri, 9 Oct 2015 12:07:20 +0100 (IST)
Received: from [134.226.63.110] (cswireless63-110.scss.tcd.ie [134.226.63.110]) by mercury.scss.tcd.ie (Postfix) with ESMTPSA id D8464BE54; Fri, 9 Oct 2015 12:07:18 +0100 (IST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cs.tcd.ie; s=mail; t=1444388839; bh=AwRTcEe1cJK9Tg50XInMxbJFs2ByyYdZDqbU18LuqwM=; h=Subject:To:References:Cc:From:Date:In-Reply-To:From; b=2PcseQgx7RdgLAC2sL2f2Hf18MlfpgmsQSnLL0az9vUBoR5GMqc1Siw5+EFhWcPjN x9reQqf9moOcVy9IeOakEMs4RiSU3RdYOmgZVLAH4HoXoM+xrlJ39ktVsN61T4k9ND tS5lMyJShsxAM1KeLG09nOSWoklHoxRZM4/o2nE8=
To: Mirja Kühlewind <mirja.kuehlewind@tik.ee.ethz.ch>, The IESG <iesg@ietf.org>
References: <20151001115619.27054.3625.idtracker@ietfa.amsl.com> <56178C5B.1000609@tik.ee.ethz.ch>
From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
Openpgp: id=D66EA7906F0B897FB2E97D582F3C8736805F8DA2; url=
Message-ID: <56179FE6.1000700@cs.tcd.ie>
Date: Fri, 09 Oct 2015 12:07:18 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0
MIME-Version: 1.0
In-Reply-To: <56178C5B.1000609@tik.ee.ethz.ch>
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
Archived-At: <http://mailarchive.ietf.org/arch/msg/conex/8C0ThMECOxf23bARMKMKQxWiNBg>
Cc: draft-ietf-conex-tcp-modifications.ad@ietf.org, draft-ietf-conex-tcp-modifications@ietf.org, conex-chairs@ietf.org, conex@ietf.org
Subject: Re: [conex] Stephen Farrell's No Objection on draft-ietf-conex-tcp-modifications-09: (with COMMENT)
X-BeenThere: conex@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Congestion Exposure working group discussion list <conex.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/conex>, <mailto:conex-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/conex/>
List-Post: <mailto:conex@ietf.org>
List-Help: <mailto:conex-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/conex>, <mailto:conex-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 09 Oct 2015 11:07:24 -0000


On 09/10/15 10:43, Mirja Kühlewind wrote:
> Hi Stephan,
> 
> quick reply to you comment below. The two points below are discussed in
> draft-ietf-conex-destopt as ConEx is signaled in the IP layer and the
> attacks would (from my point of view) only interfere with the signaling
> (and not any additional algorithms that are used in TCP to decide when
> to set a marking).
> 
> draft-ietf-conex-destopt even has an own section on "Mitigating flooding
> attacks by using preferential drop". I guess that's what you've been
> looking for, right?
> 
> Further, draft-ietf-conex-destopt says in the security section that
> IPsec AH can be used to detect changes to ConEx information. Actually it
> does not say what to do if such changes are detected. I'll check with my
> co-authors if we can add some more information here.
> 
> Regarding draft-ietf-conex-tcp-modifications, I've added two sentences
> at the beginning of the security section to say that these issues are
> discussed in draft-ietf-conex-destopt. Is that okay for you?

Seems good, thanks,
S.

> 
> Mirja
> 
> 
> 
> On 01.10.2015 13:56, Stephen Farrell wrote:
>> Stephen Farrell has entered the following ballot position for
>> draft-ietf-conex-tcp-modifications-09: 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-conex-tcp-modifications/
>>
>>
>>
>> ----------------------------------------------------------------------
>> COMMENT:
>> ----------------------------------------------------------------------
>>
>>
>> Seems like a fine thing to experiment with. I hope the results
>> are interesting.
>>
>> The security considerations really ought take into account or at
>> least mention potential misbehaviour by middleboxes and also how
>> conex might be affected by DoS attacks.
>>
>