| UPnP didn't work when I was setting up the 360 and even putting it into the DMZ didn't work (perhaps an issue w/ my router). But opening up these ports worked like a charm.
As far as hacking, those ports are only open to those IP addresses. While I understand and appreciate that the 360 and the PS3 are computers underneath, I doubt anyone will be snooping onto my network and actually able to access anything on either console. |