[LARTC] Serious Routing problem

["Segree, Gareth" <Gareth.Segree@gleanerjm.com>]

It might seem like I'm asking this question in vain but let me post it for
the last time.

I have a server with two interfaces 128.187.2.0/16 and 128.187.1.0/16 that
was setup by a vendor (I dont think there is any ip routing enabled).

I have a hosts on two hubs (server card 1 is on hub 1 128.187.2.1 and server
card 2 is on hub 2 128.187.1.1) 

I have a firewall with two interface cards with the following eth1:
128.187.3.1/24 [hub 1] and eth2: 128.187.4.1/24 [hub 2].

I want each side to talk to the other in the event that one of the network
card goes down.

I have a firewall setup like the following.

eth1: 128.187.3.1/24 and eth2: 128.187.4.1/24 - with clients on each side of
the lan with default gateway being the interface that it is connected to.

I have done the following:
echo 1 > /proc/sys/net/ipv4/ip_forward
ip route replace 128.187.1.1 dev eth1
ip route replace 128.187.2.1 dev eth2

From the firewall I can ping 128.187.1.1 & 128.187.2.1.

clients from the 128.187.3.0 side can't ping 128.187.2.1 and clients from
the 128.187.4.0 side can't ping 128.187.1.1.

How can I allow hosts on the eth1: 128.187.3.1/24 to ping 128.187.2.1 and
hosts on eth2: 128.187.4.1/24 to ping 128.187.1.1.

Thanks in Advance.


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