Hey. do the costume setup in network setup in the ps3, put everything on auto but not the dns. there you put 4.2.2.2 and 4.2.2.3. helped for me:D

You need to enter the router configuration. How you do this varies by model, but usually involves typing your gateway address into a web browser. Then, you need to assign your Ps3 an internal IP address and activate port triggering or forwarding (depending on the sophistication of your device) to send information on the designated ports to the Ps3