@RicardoVR , I have a ER7206, I did the same thing and also tried UPNP and also Port Triggering but my Plex only shows connection for a few minutes and then display again "Not available outside your...

I'm trying to setup the remote access to plex server (port 32400), I tried using UPNP, NAT Virtual Server and Port Triggering... on each option the plex will detect the remote for just a few minutes...