IETF Logo Mail Archive

Re: New Version Notification for draft-huitema-6man-random-addresses-00.txt

Fernando Gont <fgont@si6networks.com> Wed, 15 July 2015 15:28 UTC

Return-Path: <fgont@si6networks.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 458901ACDED for <ipv6@ietfa.amsl.com>; Wed, 15 Jul 2015 08:28:41 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.902
X-Spam-Level:
X-Spam-Status: No, score=-1.902 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] 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 KpcdPhRhwqjD for <ipv6@ietfa.amsl.com>; Wed, 15 Jul 2015 08:28:38 -0700 (PDT)
Received: from web01.jbserver.net (web01.jbserver.net [IPv6:2a00:8240:6:a::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4D08A1ACDD2 for <ipv6@ietf.org>; Wed, 15 Jul 2015 08:28:38 -0700 (PDT)
Received: from [88.128.80.3] (helo=[10.54.147.200]) by web01.jbserver.net with esmtpsa (TLSv1.2:DHE-RSA-AES128-SHA:128) (Exim 4.85) (envelope-from <fgont@si6networks.com>) id 1ZFObq-00065N-Sc; Wed, 15 Jul 2015 17:28:34 +0200
Message-ID: <55A67B45.9020902@si6networks.com>
Date: Wed, 15 Jul 2015 12:24:53 -0300
From: Fernando Gont <fgont@si6networks.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
MIME-Version: 1.0
To: Tim Chown <tjc@ecs.soton.ac.uk>, Alexandru Petrescu <alexandru.petrescu@gmail.com>
Subject: Re: New Version Notification for draft-huitema-6man-random-addresses-00.txt
References: <20150701171258.28235.17688.idtracker@ietfa.amsl.com> <DM2PR0301MB06552EC00BF6C1045DC6AFB7A8A80@DM2PR0301MB0655.namprd03.prod.outlook.com> <55966D7D.40508@gmail.com> <58D79755-FAE3-4DDE-A054-86D5F1FF0B8C@ecs.soton.ac.uk> <EMEW3|69f5c1b5a5daf4f7291b59f86b7bccedr6EDeK03tjc|ecs.soton.ac.uk|58D79755-FAE3-4DDE-A054-86D5F1FF0B8C@ecs.soton.ac.uk>
In-Reply-To: <EMEW3|69f5c1b5a5daf4f7291b59f86b7bccedr6EDeK03tjc|ecs.soton.ac.uk|58D79755-FAE3-4DDE-A054-86D5F1FF0B8C@ecs.soton.ac.uk>
Content-Type: text/plain; charset="windows-1252"
Content-Transfer-Encoding: 8bit
Archived-At: <http://mailarchive.ietf.org/arch/msg/ipv6/UjR9fhNxHIlTuSZvlqfmu52q2Yg>
Cc: ipv6@ietf.org
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 15 Jul 2015 15:28:41 -0000

Hi, Tim,

On 07/15/2015 09:39 AM, Tim Chown wrote:
>> Indeed, changing the IID as the MAC address changes is a good idea.
>> It obviously enhances the privacy afforded. ...
> 
> There may be a little more to say on IID-MAC address mappings. A
> different perspective on this issue is the ‘first hop security’ (FHS)
> one. If a host changes its IP address and not its MAC address,
> relatively rapidly over a short space of time, then network devices
> using FHS may block the device from the network, viewing the changes
> as some kind of attack.
[...]

FWIW, this is one f the reasons for which I think the topic of
link-layer address randomization deserves a document on itself, and
there are a bunch of things to consider. I personally see link-layer src
addr randomization as pretty experimental, and think a bunch of issues
are going to pop up as we gain experience...

Cheers,
-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492

v2.23.0 | Report a Bug | By Email