Hello,
I have tested across my VPN and non-VPN connection and neither show that remote access is successful. I can verify that both IP ports are open when testing from a tool as well as know that on my router the port is open as well. I had previously had this configured and working well and now it is not at all.
Plex version: 1.1.4.2757
Mac Mini, running OS X (10.11.6)
Comcast Xfinity