iproute/iptables best?

[Gene Heskett]

Scenario:

1 machine, two net cards, two networks

How can we make the reply to an action go back out through the route 
it came in on?  As it exists, queries, ssh sessions etc coming in 
thru a vpn from one router are being replied to on the default 
gateways card that hits the other network.

Is iptables the best tool, or is iproute2 the best tool to do this?

Pointers to good docs etc appreciated.  Thanks.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
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Copyright 2005 by Maurice Eugene Heskett, all rights reserved.
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