From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ramin Alidousti <ramin@cannon.eng.us.uu.net>
Subject: Re: ssh
Date: Mon, 24 Jun 2002 09:56:30 -0400
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To: Maciej Soltysiak <solt@dns.toxicfilms.tv>
Cc: Antony Stone <Antony@Soft-Solutions.co.uk>, netfilter@lists.samba.org

On Mon, Jun 24, 2002 at 03:47:49PM +0200, Maciej Soltysiak wrote:

> > 1. You can't.   Netfilter / IPtables works by port number, not by content, so 
> > you can only filter by port number.
> Hmm, maybe you could...
> Look:
> 1. look for a openingpacket with ssh connection characteristics, say a
>    version string and mark packets, use recent module, put them to a
>    seperate chain. something like that.

Yes. Very expensive though and not full-proof in case of fragments.

Ramin

> 2. filter by port number.
> 
> What do you think?
> 
> Maciej
>