LAN to LAN routing on WiFi router

zhark

I have a ZYXEL EMG3525 router and a Linux firewall. Behind the firewall there are a few subnets 10.1.X 10.2X etc. The ip of the router is 10.0.0.1 and the ip of the firewall is 10.0.0.2

I need to add a static route for 10.1.X and 10.2.X with GW of 10.0.0.2 to the router but when I try to add a static route the only options I have for interface is “ETHWAN” and “WWAN”. I don’t want either of these I want to route LAN to LAN. Does anyone know if this is even possible on this device - it seems to be a fairly standard routing setup?

Any insight would be helpful. Thanks in advance.