netdev - Re: two gateways with one NIC

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Message-ID: <20070409161142.GC2299@csclub.uwaterloo.ca>
Date:	Mon, 9 Apr 2007 12:11:42 -0400
From:	lsorense@...lub.uwaterloo.ca (Lennart Sorensen)
To:	W Agtail <wagtail@....ie>
Cc:	netdev@...r.kernel.org
Subject: Re: two gateways with one NIC

On Mon, Apr 09, 2007 at 04:56:20PM +0100, W Agtail wrote:
> Hi there, and thanks v. much for getting back to me on this one.
> I now have changed iptables on the web servers to the following:
> 
> iptables -t mangle -A POSTROUTING -p tcp --sport 8088 -o eth0 -j MARK
> --set-mark 1
> iptables -t mangle -A POSTROUTING -p tcp --sport 8089 -o eth0 -j MARK
> --set-mark 2
> 
> But I'm still seeing traffic being returned via gw2 for port 8088 :(
> Any ideas? Thanks.

Hmm, I know I have done something like this before (I made all port 80
traffic return through another host rather than the default gateway, but
it was about 3 years ago and I don't remember the exact syntax).

Does your logs show both mark 1 and 2 being used?

Are you sure that the syntax for the ip route rules is right?  I don't
remember if it was fwmark or something else.  I also remember I was
using a mark of 30000ish not, 1 or 2.  No idea if low numbers are
reserved or any such thing.

--
Len Sorensen
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