Hi all, I hope someone can help me.
I have a Symantec Gateway Security appliance as the external gateway/firewall on my network. The external wan port is configured to the static ip from my isp, and the internal lan address is 192.168.0.33/24. Through a crossover cable, this device is connected to a Cisco switch, addressed as 192.168.0.42/24.
I recently added another similar gateway device, and configured the wan port on the new device as 192.168.0.35/24 and connected it to a port on the Cisco switch. I set the internal lan of this unit to 192.168.0.1/24.
I added a routing table entry on the new gateway to forward packets to the first gateway, through the wan port (destination ip:192.168.0.33/24, gateway:192.168.0.35, interface:WAN), and I can communicate with that subnet from the new network.
However I've tried adding a number of different routing table entries on the original router, to allow communication from the original subnet to the new one, to no avail. For example, I've tried the following:
- destination ip:192.168.0.1/24, gateway:192.168.0.35, interface:LAN
- destination ip:192.168.0.1/24, gateway:192.168.0.35, interface:WAN
- destination ip:192.168.0.1/24, gateway:192.168.0.33, interface:LAN
- destination ip:192.168.0.1/24, gateway:192.168.0.33, interface:WAN
- destination ip:192.168.0.1/24, gateway:192.168.0.42, interface:LAN
- destination ip:192.168.0.1/24, gateway:192.168.0.42, interface:WAN
None of which allowed me to ping the new gateway from a computer on the original network.
Does anyone have any thoughts? If you need more info, or if I haven't explained something properly, please let me know.