We've recently switched our Playstation from connecting via Wifi through our isp's router to going via Ethernet cable through the Family Zone box.
Since the change we've had problems with Fortnite loading and the Playstation Network test gives an error during it's NAT test.
This is the description of the error:
Please check that the firewall settings on your router or access point do not block UDP Ports 3478 and 3479.
This is while we are in Play mode and Fortnite has been enabled for the age profile the ps4 is on.
Any help would be much appreciated. Being without Fortnite is glorious for us but I get reminded of this problem hourly....