[clug] A Routing problem

Martijn van Oosterhout kleptog at svana.org
Wed Oct 20 16:01:57 GMT 2004

You may be able to do this using rules. Maybe something like:

ip rule add dev eth2 to table 500 pref 500
ip rule add dev eth0 to table 501 pref 501

ip route add dev eth2 table 500
ip route add dev eth0 table 501

Be aware this is asymmetric routing and you'll get all the issues
related to that. I'm not totally sure about the syntax, nor whether the
"dev" argument represents the incoming interface, but it should point
you in the right direction.

Hope this helps,

On Wed, Oct 20, 2004 at 07:38:52PM +1000, Stephen Hodgman wrote:
> I have a question regarding routing.  I have a linux system with three 
> interfaces say eth0, eth1 & eth2
> On eth0 is network (say)
> I want traffic entering eth1, destined for to be routed 
> to eth0 - always
> I want traffic entering from eth2 destined for to be 
> routed to eth2 - always
> The reason is that there is a route either way but I only want one 
> device to route directly.
> Can this be done?  It seems to require routing tables based on source 
> address/interface.
> I would appreciate knowing how this can be done.
> TIA.
> -- 
> Steve Hodgman
> Ph: +61 2 6285 3460
> Fax: +61 2 6285 3459
> Mobile:	+61 407 182 355
> steve at namsys.com.au
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Martijn van Oosterhout   <kleptog at svana.org>   http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
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