How can I unlock PMS with Tailscale on Qnap?

Dear SKC176, thank you for your inquiry and support! The special thing is that when I access my PMS via a browser on my phone (via https:// :32400) I see direct play in the PMS dashboard for different ways of connecting (Wifi without Exit Node, 5G and Wifi with Exit Node). With Wifi (without Exit Node) I see the local LAN IP (of my phone). With 5G and Wifi incl. Exit Node, I see the IP address of Tailscale. In other situations, apps on my phone that access my QNAP (such as Qfile) work great in combination with Tailscale. Both with and without Exit Node and with or without WiFi. So my router, LAN, Talescale and QNAP work fine together.

With PlexAmp and previously with the Plex App (because as you know I can’t get Plex App to work on my phone anymore) I see in the PMS dashboard in case of PlexAmp or Wifi (without Exit Node) the local LAN IP (of my phone). With 5G or Wifi with Exit Node on, I don’t see an IP address (because I’m playing indirectly).

Plex apps use - as I read on the Internet - their own protocol (GDM: Good Day Mate) to find other Plex servers in the LAN. GDM also works with Tailscale (if the client is connected via Tailnet of course). This works for you too. I have no idea where to find the solution (other than on this forum).