you need to enter into your router normally by putting
http://192.168.0.1/ into your browser the usual defaul username is admin and the default password is password. then you need to check attached devices to see which ip in your network belongs to your pc. if possible set your ip up as static inside your router if not continue on. the final stage is to formard ports 9990-9998 to your network ip. which should be something like 192.168.0.4 or something to that effect. but the ports must be opened inside the router to your pc