netdev - Re: two gateways with one NIC

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Message-ID: <461A7472.4030604@trash.net>
Date:	Mon, 09 Apr 2007 19:14:26 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	wagtail@....ie
CC:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	netdev@...r.kernel.org
Subject: Re: two gateways with one NIC

W Agtail wrote:
> Thanks Patrick for your comments too.
> It seems that you can't mix PREROUTING with --sport or -o.

-o only works after routing.

> I've also changed the ip rule tables to higher numbers, so I now have:
> iptables -t mangle -A PREROUTING -p tcp --dport 8088 -i eth0 -j MARK
> --set-mark 1
> iptables -t mangle -A PREROUTING -p tcp --dport 8089 -i eth0 -j MARK
> --set-mark 2


You should really read some iptables tutorial or at least the manpage.
Its quite easy to set up what you want, but you're again not properly
marking the return traffic.

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