From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Jones <admin@buddhalinux.com>
Subject: Re: matching the first packet of a connection
Date: Wed, 04 May 2005 12:57:07 -0500
Message-ID: <42790CF3.9090801@buddhalinux.com>
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To: Eric Leblond <eric@inl.fr>
Cc: netfilter@lists.netfilter.org

Eric Leblond wrote:

>Hi,
>
>I'm trying to match the first packet of a connection : for a TCP
>connection I want to match the first SYN packet received by the firewall
>and ignore the possible reemission, in fact I want to accept them.
>
>Is this possible ?
>
>I've try to use the conntrack module but I was not successful.
>
>BR,
>  
>
The "tcp filter" Table Match Operations provide:

-p tcp --syn

Thomas