I now have a fully working router

Thank-you very much for your kind assistance, it’s hugely appreciated.

Kindest Regards,

Greg.

I just recently setup a linux box as a router with eth0 as 111.111.111.160 and eht1 as 192.168.1.254

computers on the 111 network could not get to the computers on the 192 network and vice versa.

My firewall is on the 111 network and when I put the route
192.168.1.0/24 in the router then all was well.

The reason is that all clients on the 111 network have gateways to the IP of the firewall, as well as does the eth0 of the linux router box. So any traffic destined for an IP that cant be found on the network is then directed to the firewall. For the 192 network, the eth0 111.111.111.160 routed traffic for the 111 network to the default gateway of eth0 which is the firewall, and it had no routing info.

The route 192.168.1.0/24 111.111.111.160 in the firewall basically states, any traffic from the 111 network destined for the 192 network goes to 111.111.111.160 network interface eth0 on the linux router box, and any traffic from the 192 network to the 111 network follows the route to the firewall and then is routed to the 111 network.

Hope this is not to confusing and actually is of some help

The HumbleNetAdmin