Use APKPure App
Get Set Up Port Forwarding on a Router old version APK for Android
Accessing Your Router on Windows, Accessing Your Router on MacForwarding a Port
This App teaches you how to open a specific port on your router so that an application can access your network. Opening specific ports can allow games, servers, BitTorrent clients, and other applications to work through the usual security of your router that otherwise does not permit connections to these ports, though having open ports also leaves your network vulnerable to attacks