Re: [v6ops] [ipv6-wg] Extension Headers / Impact on Security Devices

Fernando Gont <fgont@si6networks.com> Fri, 26 June 2015 07:58 UTC

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Date: Fri, 26 Jun 2015 04:54:06 -0300
From: Fernando Gont <fgont@si6networks.com>
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To: Brian Haberman <brian@innovationslab.net>, v6ops@ietf.org
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Subject: Re: [v6ops] [ipv6-wg] Extension Headers / Impact on Security Devices
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On 06/17/2015 03:22 PM, Brian Haberman wrote:

>> fragment" of a single datagram coming in, this is probably not an
>> option for all those types of security controls (intrusion detectors,
>> First Hop Security mechanisms, Infrastructure ACLs) expected to work
>> mostly in wire speed. It is hence not an option for a number of
>> networks using such techniques which is why they usually drop all
>> extension headers except for AH, ESP and (in a few cases) FH. Doing
>> so is a reasonable decision from their side and will not exactly
>> encourage widespread development of new services using extension
>> headers. Which then raises the question: what's the benefit of this
>> thing called extension headers which do not provide much use today
>> and might - given there's a growing number of networks acting as
>> described - not provide much use tomorrow? This thing then seems to
>> add an undesirable layer of complexity.
> 
> Hmm... The old NFR platform, which I think got purchased by Checkpoint,
> performed fragmentation re-assembly prior to doing its analysis.  So, at
> least some products close that hole.

... for IPv6 traffic?

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