To forward(open) ports, You have to assign a static ip address on PS3 like 192.168.1.10, with subnet mask of 255.255.255.0, and gateway 192.168.1.1, DNS1 as 192.168.1.1 and DNS2 as 4.2.2.2 , After that open setup page of router by typing http://192.168.1.1 in browser’s address bar, and typing password as "admin" and no user name. Go to security tab, and disable block anonymous internet requests. Go to applications and gaming tab. Now Forward the ports you have to this static ip address, which you assign to your PS3. Make sure the firmware of router is latest.