You will have to do this in your router's set up on the computer. The instructions that came with it should tell you how to get there. Once in look around for port forwarding. Most times these sections have a space for applications- you can put whatever you like in here, PlayStation 3 as an example. Then, just enter the ports as listed above and hit the Apply/ Save Settings/ OK button (different routers label these differently). It's really a somewhat simple thing to do.