Hi all. I got Virgin broadband yesterday and I would like to forward ports for PS4 and PSN. I have the port numbers, but when it comes to inputting them into the router I've hit a problem. For example I want to forward port 80. So i put 80 into the local port boxes but what do I enter into the 'external port' boxes. I've tried inputting 80 into all boxes but it won't have it.
I'm trying to achieve NAT 1 (OPEN) and don't really want to use DMZ.