Port Forward not working

[pbolduc]

Well i've compared your port forward with my port forward. The only difference I can see is in your NAT rule. Mine looks like this: WAN -> TCP -> * -> * -> * -> 3389 -> PC -> 3389 -> RDP Description

Is the phone and the computer on the same remote network?

Make sure the offsite computer doesn't have a software firewall blocking outbound TCP 3389. Sounds more like a remote computer problem then an OPNSense firewall problem if a remote cellphone app connects through the OPNSense router and not the remote computer.

Things to try: From the Remote computer can you remote telnet to port 3389. E.g telnet <public-ip> 3389

Does it show as the port being open? If it is open it will show a flashing cursor and a blank screen. If it fails it will return: Could not open connection to the host, on port 3389.

From the remote computer in question, are you able to use RDP to another computer on the local network to another PC without any routing?