Manually forwarding a port
If UPnP/NAT-PMP is not available or does not work, it will be necessary to forward the port manually. A forwarded port is needed for any P2P client you use, not just µTorrent. Since we want to forward a single port, we need to set the listen port for µTorrent:
To set a single port, navigate to Options > Preferences > Connections
Click "random port" once, and note the port number provided. This will be the port number you will be forwarding in your router. (You may also assign a port number of your choice)
Uncheck "Randomize port each time µTorrent starts." The port number will no longer change each time µTorrent is started.