From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anders Fugmann <afu@fugmann.dhs.org>
Subject: Re: NEW vs INVALID
Date: Tue, 01 Oct 2002 11:05:10 +0200
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To: Cedric Blancher <blancher@cartel-securite.fr>
Cc: netfilter@lists.netfilter.org

Cedric Blancher wrote:
> By the way, I was wondering why --syn was "only" equivalent to :
> 	--tcp-flags SYN,ACK,RST SYN
> 
> And not to :
> 	--tcp-flags SYN,ACK,RST,FIN SYN
> 
The tcp-flags would then not match packets with the SYN & FIN bits set, 
which is actually connection request, with should be closed immdiatly 
after opening. The syn-fin is widly used to scan hosts, and should be 
dropped. But still - it is a connection request and should therfore be 
caught by --syn.

Regards
Anders Fugmann

-- 
Neo: 'Can you fly that thing?'
Trinity: 'Not yet'.
$ apt-get install pilot-prg-v212helicopter.