From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pablo Neira Ayuso <pablo@netfilter.org>
Subject: Re: Follow packets in rules
Date: Wed, 13 Jun 2007 10:57:26 +0200
Message-ID: <466FB176.7040306@netfilter.org>
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To: Fabrice Rafart <fabrice.rafart@efs.sante.fr>
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Fabrice Rafart wrote:
> I look for a tool to follow a packets into rules of netfilter.
> 
> For example :
> 
> # iptables-test -s 192.168.1.1 -d 192.168.2.1 -p tcp --dport 25
> --> FORWARD line 1  : -p tcp --dport 25 -j SMTP
> --> SMTP line 3     : -s 192.168.1.0/24 -j DROP
> 
> This show me which rules matches the packet until the end.
> 
> Does this exist ?

check nfsim: http://ozlabs.org/~jk/projects/nfsim/

AFAIK, it's not actively maintained so probably you'll have to hack on 
it a bit.

-- 
The dawn of the fourth age of Linux firewalling is coming; a time of 
great struggle and heroic deeds -- J.Kadlecsik got inspired by J.Morris