From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrea Rossato <mailing_list@istitutocolli.org>
Subject: Re: Modifying Source Ip on input/prerouting
Date: Wed, 11 Dec 2002 17:34:41 +0100
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Stephane Jourdois wrote:
> The problem is that I wan't to change the incoming traffic...
> What I would need is something similar to :
> 	-A PREROUTING -j SNAT --from-source xxx

what you need is probably

iptables -A OUTPUT -t nat -j DNAT --to 1.2.3.4

iptables tutorial says that output chain in nat table is broken. but i 
don't know if it still is.
andrea