[andreasbleck]

For the ports, looking at this example at the side, 7777:7777 should be fine (start port:end port), but you need to specify the right ip for your computer and do it 2 times, 1 for TCP and 1 for UDP, look at this example, my router configured (should look like the bottom part of your router config)

To get your local ip (mine for example is 192.168.1.31) open cmd and type ipconfig like this:

The lan ip is the one named IP Address...