From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pascal Italiaander <pc-secure@home.nl>
Subject: Re: Ip handling
Date: Thu, 19 Jun 2003 01:51:40 +0200
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You wrote:
> Does anyone know of a way to make say all connections from the outside
> going to my outside IP address Appear to be coming from my local lan of
> 192.168.0.1

Did you know that this is spoofing ??

So you want to allow spoofing , bad idea.

To aproach your problem, I would rather match on MAC address.

example:

iptables -I INPUT -p all -m mac --mac-source 10:20:30:40:05:06 -m \
	state state NEW -j ACCEPT
iptables -I OUTPUT -p all -m state ESTABLISHED,RELATED -j ACCEPT

have fun

Pascal