Re: [v6ops] Some stats on IPv6 fragments and EH filtering on the Internet

joel jaeggli <joelja@bogus.com> Thu, 07 November 2013 19:06 UTC

Return-Path: <joelja@bogus.com>
X-Original-To: v6ops@ietfa.amsl.com
Delivered-To: v6ops@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 191CE11E81FF for <v6ops@ietfa.amsl.com>; Thu, 7 Nov 2013 11:06:05 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -102.279
X-Spam-Level:
X-Spam-Status: No, score=-102.279 tagged_above=-999 required=5 tests=[AWL=-0.279, BAYES_00=-2.599, J_CHICKENPOX_13=0.6, NO_RELAYS=-0.001, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id oi7PFKiCq6q8 for <v6ops@ietfa.amsl.com>; Thu, 7 Nov 2013 11:06:04 -0800 (PST)
Received: from nagasaki.bogus.com (nagasaki.bogus.com [IPv6:2001:418:1::81]) by ietfa.amsl.com (Postfix) with ESMTP id 9659911E8118 for <v6ops@ietf.org>; Thu, 7 Nov 2013 11:06:04 -0800 (PST)
Received: from wireless-a-1x-v6.meeting.ietf.org (wireless-a-1x-v6.meeting.ietf.org [IPv6:2001:67c:370:184:419e:c485:c804:a314] (may be forged)) (authenticated bits=0) by nagasaki.bogus.com (8.14.4/8.14.4) with ESMTP id rA7J5wx1045920 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Thu, 7 Nov 2013 19:05:58 GMT (envelope-from joelja@bogus.com)
Content-Type: multipart/signed; boundary="Apple-Mail=_9B848F55-8F16-445E-B2D0-1ED2A2291723"; protocol="application/pgp-signature"; micalg="pgp-sha1"
Mime-Version: 1.0 (Mac OS X Mail 7.0 \(1816\))
From: joel jaeggli <joelja@bogus.com>
In-Reply-To: <C1BEE5D4-FDC2-4E4B-947D-CEC9E4F05E5D@employees.org>
Date: Thu, 07 Nov 2013 11:05:58 -0800
Message-Id: <1CC52A18-ADA1-4987-9AB4-2D6C75379AA8@bogus.com>
References: <5278275C.50206@gont.com.ar> <alpine.DEB.2.02.1311050028410.26054@uplift.swm.pp.se> <52783535.9030200@si6networks.com> <20131105001243.53E28985D0D@rock.dv.isc.org> <527839C6.3000805@viagenie.ca> <2134F8430051B64F815C691A62D98318148100@XCH-BLV-504.nw.nos.boeing.com> <F4AB804C-2C8E-40EF-ACE9-0A901E4F5122@employees.org> <52784DD1.7020106@gont.com.ar> <BD308F06-C9E2-42EB-9D23-CFD3432F1A1D@employees.org> <52785F34.6020606@si6networks.com> <A9F99218-AB14-45AA-B29D-7E1D7E4B93FC@employees.org> <5278E639.3040606@inex.ie> <C4864CA1-C8F4-45D6-944A-0E8BA073D4A7@employees.org> <5278E986.9050409@inex.ie> <C1BEE5D4-FDC2-4E4B-947D-CEC9E4F05E5D@employees.org>
To: Ole Troan <otroan@employees.org>
X-Mailer: Apple Mail (2.1816)
X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.7 (nagasaki.bogus.com [IPv6:2001:418:1::81]); Thu, 07 Nov 2013 19:06:00 +0000 (UTC)
Cc: Fernando Gont <fgont@si6networks.com>, "v6ops@ietf.org" <v6ops@ietf.org>, Fernando Gont <fernando@gont.com.ar>
Subject: Re: [v6ops] Some stats on IPv6 fragments and EH filtering on the Internet
X-BeenThere: v6ops@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: v6ops discussion list <v6ops.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/v6ops>, <mailto:v6ops-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/v6ops>
List-Post: <mailto:v6ops@ietf.org>
List-Help: <mailto:v6ops-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/v6ops>, <mailto:v6ops-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 07 Nov 2013 19:06:05 -0000

On Nov 5, 2013, at 4:54 AM, Ole Troan <otroan@employees.org> wrote:

> Nick,
> 
>>> if you use one of these in the Internet core I cannot see any other choice than to
>>> allow forwarding of fragments. 
>> 
>> no, drop!  Because otherwise your infrastructure is wide open to control
>> plane attacks with ipv6 frags, with no means of defence!  If that happens,
>> then your entire network falls over.
> 
> why don't you filter out packets on the edge destined to your router's addresses?
> instead of what's effectively breaking IPv6 service across the network.

my routers actually do process unsolicited packets from from the internet (icmp echo for example, packets of any variety with a ttl of 1) and do need the control plane acl that reflects that.


> 
> cheers,
> Ole
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops