Routing with two gateways

From: Matthias Haack (clearwater_at_bigfoot.com)
Date: 07/30/04 

Date: Fri, 30 Jul 2004 19:33:55 +0200

Hi,

currently I am trying to setup my routing table to route everything
through the default gateway except for three networks which should be
routed through a vpn. My problem is that the second gateway lies within
one of the three networks.

Table that doesn't work (due to a cycle I think):

Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
A.B.0.0 W.X.Y.Z 255.255.0.0 U 0 0 0 tun0
C.D.0.0 W.X.Y.Z 255.255.0.0 U 0 0 0 tun0
W.X.0.0 W.X.Y.Z 255.255.0.0 U 0 0 0 tun0 <=X
0.0.0.0 10.0.0.138 0.0.0.0 UG 0 0 0 eth0

As long as line X is not within the table it works but without the
network W.X.0.0. With that line I think (i.e.) W.X.1.1 is routed to
W.X.Y.Z then line X matches again and so on...

Is there a way to set up this properly without replacing my default
route? Even using iptables would be fine...

Matthias

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