how to unblock port in universal media server ps4

My network setup is a little bit exotic my router/firewall is a Linux box, so I have all of the network diagnostic tools at my disposable. Manually opening port 3074 on one PS4 worked of course for that console, but the 2nd console was still out of luck. When I tried to rely solely on UPnP for PS4, both consoles would have Moderate NAT and the corresponding lag and matchmaking problems. UPnP solved the problem fine on my PS3s and I got Open NAT on both consoles. I happen to have multiple PS4s in my house, and I could not for the life of me get both consoles to have Open NAT in CoD Ghosts. My theory is that there is some logic in the PS4’s firmware that attempts to determine whether the network has a UPnP-enabled router and dynamically enables or disables UPnP, or just forces you to keep UPnP on. For whatever reason, the PS4 has no option for UPnP. The PS3 firmware’s network settings has a setting to allow you to toggle UPnP support on and off. This automates what used to be the old game of figuring out how to manually forward the ports on your router by yourself to allow you to play certain games online, or be able to run a Minecraft server or what have you. UPnP is a network protocol that allows devices on a network to communicate with a UPnP-enabled router and request ports be opened and forwarded through the router’s firewall.

How to unblock port in universal media server ps4