Just curious if anyone specifically has a similar environment where two or more people are using two or more PS4s with two or more copies of Destiny on a single network with a single public IP.

UPnP is enabled and "works", however a post here (http://www.playstationlifestyle.net/201 ... orkaround/) alludes to issues with PS4's (or possibly Destiny's?) UPnP implementation. I see dynamic ports being opened in my NAT rules, however only a single console can open 3074.

The odd thing is that we can play together, however it is intermittent. One of us will get dropped at random points in the game (either in the middle of a mission or between loading destination), and after a few minutes the dropped player can connect again. If we join a PSN party outside of Destiny then try to play together, it absolutely never works.

The odd thing is that using this exact same configuration these two consoles can play Diablo 3 over PSN no problem, so this is why I am specifically asking regarding Destiny. I plan on making a similar post on the Bungie forums but wanted to start here.

But does the CoD workaround mentioned in the linked post (running the network test on both consoles before starting the game) work for Destiny as well?

Well this is solved now. Turns out after assuring me he was connected via ethernet he was connected via wireless. Never had a chance to check this before.

The wireless AP is a good distance from the PS4 so that likely accounts for the intermittent dropping after enabling UPnP; so far 30 minutes without dropping.

Edit: And no the internet test thing didn't have an affect prior to switching to LAN connection

I should note that the Wireless AP is a Ubiquiti Unifi, so there wasn't any double NAT going on.