netdev - Re: Connection tracking and vlan

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Message-ID: <20091030165500.GA8789@gondor.apana.org.au>
Date:	Fri, 30 Oct 2009 12:55:00 -0400
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Adayadil Thomas <adayadil.thomas@...il.com>,
	netdev@...r.kernel.org, Patrick McHardy <kaber@...sh.net>
Subject: Re: Connection tracking and vlan

On Fri, Oct 30, 2009 at 05:19:30PM +0100, Eric Dumazet wrote:
>
> No, Abayadi needs firewall rules (or RPF), before entering conntrack.

rp_filter doesn't help because routing occurs after conntrack,
so IP fragments from the untrusted side may have already been
folded into a fragment from the trusted side.

Yes netfilter rules pre-conntrack would help but I bet there
are a lot folks out there who don't have them.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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