My router will respond to UPNP actions for port forwarding. However the software is unable to do so under Ubuntu as the library for it isn't installed by default. So can we please have what library is used for this support in Plex Media Server in order to install the right one on Ubuntu (or other supported GNU/Linux distributions). In windows once the UPNP host service was set to start Automatically and Started then the Remote Access would work; under Linux however no such luck.
The ports for it are opened under the computers firewall with the right protocols.