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Re: [v6ops] Fwd: New Version Notification for draft-taylor-v6ops-fragdrop-00.txt

Fernando Gont <fgont@si6networks.com> Tue, 23 October 2012 08:19 UTC

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Date: Tue, 23 Oct 2012 05:18:52 -0300
From: Fernando Gont <fgont@si6networks.com>
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Cc: "C. M. Heard" <heard@pobox.com>, IPv6 Ops WG <v6ops@ietf.org>
Subject: Re: [v6ops] Fwd: New Version Notification for draft-taylor-v6ops-fragdrop-00.txt
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On 10/16/2012 08:21 AM, Gert Doering wrote:
> Hi,
> 
> On Tue, Oct 16, 2012 at 08:07:08AM +0100, Brian E Carpenter wrote:
>> Use the flow label. This is one of the reasons we did RFC 6436, 6437 and 6438.
> 
> So how exactly is "filter based on an arbitrary value the attacker can
> control" better than "just let non-initial fragments through"?

I think Brian was referring to hashing, rather than filtering. And when
it comes to hashing, the FL is present in all fragments, while the
upper-layer header isn't.

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

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