From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Lopes <lopsch@lopsch.com>
Subject: Re: matching the first packet of a connection
Date: Wed, 04 May 2005 20:11:11 +0200
Message-ID: <4279103F.9080601@lopsch.com>
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Thomas Jones schrieb:
> 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
> 
> 
or something like this:
-p tcp --tcp-flags ALL SYN -m state --state NEW