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From: Alex Satrapa <alex@lintelsys.com.au>
To: zze-Proxy GRALL O ext FTRD/SVA/LAN <ograll.ext@rd.francetelecom.com>
Cc: netfilter@lists.netfilter.org
Subject: Re: Apply rules to 1 UDP port but port used as a socket: possible?
Date: Wed, 11 Feb 2004 14:00:16 +1100	[thread overview]
Message-ID: <40299AC0.80104@lintelsys.com.au> (raw)
In-Reply-To: <D4EF10CCEB2CE742BEEA9838C590B0E80113FA41@ftrdmel2.rd.francetelecom.fr>

zze-Proxy GRALL O ext FTRD/SVA/LAN wrote:
> I'm trying to use a socket (on port 1727) to decode some proprietary UDP 
> packets. When I've decoded them I want to apply a DNAT rule (and then a 
> SNAT  too) to this port using a filter on @IP:port source for all 
> following packets…

So do you have Machine F which is the firewall, and machines A, B and C which are the ultimate destinations, and you want to have UDP packets from machine X (elsewhere) being sent to A, B or C  by F based on some information in the first packet F receives from a new host X? You could write your "monitor" to set up new rules based on the first packets that arrive, with the remainder being "deflected" by the firewall rules.




  parent reply	other threads:[~2004-02-11  3:00 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-02-10 13:16 Apply rules to 1 UDP port but port used as a socket: possible? zze-Proxy GRALL O ext FTRD/SVA/LAN
2004-02-11  0:25 ` Antony Stone
2004-02-11  3:00 ` Alex Satrapa [this message]
  -- strict thread matches above, loose matches on Subject: below --
2004-02-10 13:18 zze-Proxy GRALL O ext FTRD/SVA/LAN
2004-02-11  7:53 ` Henrik Nordstrom

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