I want to host a server for playing Open TTD. I have set up port forwarding on my Smart Hub exactly as per instructions, port 3979 TCP/UCP and 3978 UCL. I have assigned both of these to my Galaxy Tablet.
Open Port Checker cannot find these. It says ports are closed.
I know the tablet can host the game when host and client are on the same router. Why don't these port forwarding rules work?