From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: How to SNAT in PREROUTING table for local machine
Date: Fri, 20 Jun 2008 12:22:50 +0200
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References: <004a01c8d204$fb1022e0$1402a8c0@nemesisk7>
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To: Tobias Krummen <tobias.krummen@t-online.de>
Cc: netfilter@vger.kernel.org

Tobias Krummen wrote:
> So, is there a way to change the source ip-address of incoming packets 
> with the given possibilities of netfilter, or are there other tools to 
> get this done?

You need to add an INPUT chain to the NAT table to do this
and adjust the HOOK2MANIP macro to deal with this.