I have the Plex Media Server installed on a OS X 10.8 Mini and it's behind double-NAT from my public IP. I've been able to connect to it directly before (must be using the voodoo of UPNP) but am running into the problem of the Remote Access repeatedly turning itself off after a couple of hours. When I turn Remote Access back on, more often than not it also shows that a link can't be established and a relay connection doesn't work either.
Due to the double-NAT, I'm not keen to try a port forward, but in these situations a relay connection should still be able to be established, but it isn't for some reason.
I've tried toggling IPV6, setting a static IP for the Mini, setting secure connections to disabled/preferred/required, but Remote Access just keeps switching itself off and doesn't work even when it's switched on.
Has anyone else run into the same issue or something similar?