How Do I Change The NAT Type?

You need to open up your network to the internetz a bit more than it is currently. Depending on what router you have, there are multiple ways of doing this. Go google "what is my ip address" and use one of the links to find out your IP address. Now type this into the address bar of a web browser. This should take you to the router page of your network. Now go to portforward.com and follow the links to find your router EXACTLY. You will need to locate your router and then locate the model number on it. Once you find it, click on it in the portforward.com page and follow the steps to forward your ports. If you need the PS3 online ports, just google for them. Make sure you get the port type and pot range correct. Also, if you have an older router you can only forward the same ports to one (1) device on your home network.