We have an application server that our company's branches connect to. Right now, they can connect because the E.R.P app developer configured our main router for port forwarding. They connect by typing
126.96.36.199:9001/forms/servlet into a web browser. 188.8.131.52 is the router's interface connected to the ISP (184.108.40.206 made up).
Our internal subnet is on the 192.168.1.0/24 subnet, the server in question is 192.168.1.25. We have 2 ISPs connected to 2 different routers, one is for backup in case the primary goes down. I want to configure the backup router (Cisco RV042) for port forwarding but I am a bit confused regarding which ports and addresses to use.
Assume 220.127.116.11 is the IP address of the second router's interface connected to the ISP. How would I forward this to my application server?