netdev - Re: Passive OS fingerprint xtables match.

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Message-ID: <alpine.LSU.2.00.0902181629300.8034@fbirervta.pbzchgretzou.qr>
Date:	Wed, 18 Feb 2009 16:30:03 +0100 (CET)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	Evgeniy Polyakov <zbr@...emap.net>
cc:	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Netfilter Development Mailinglist 
	<netfilter-devel@...r.kernel.org>
Subject: Re: Passive OS fingerprint xtables match.


On Wednesday 2009-02-18 16:07, Evgeniy Polyakov wrote:
>
>As of IPv6 support - it could be fairly trivial, the only thing we need
>is to dereference TCP header with the appropriate offset anf get don't
>fragment bit (ipv6 does not have it, so we could check both entries).

But IPv6 can have Fragment Headers, serving about the same purpose.

>But... I do not have IPv6 network to test the changes (and definitely
>did not have it 6 years ago), so it was never implemented :)

There exist lots of free VM solutions - and I think UML existed
6 years ago, too.
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