Direct Plex access

Hello everyone. I’m still an absolute beginner in the subject, please don’t swear too much.
I have TrueNAS 25.04. I installed Plex, specified the media folder, added the server via the web interface, everything worked out, the folder is visible, but when playing media, a message pops up from the folder that there is no direct access to Plex and playback is going through a repeater. Quality and speed are lost.
I have no need for Plex to be available over the internet. I want clients inside the network to connect to my server directly, without loss of quality and speed, but I don’t know what settings and where to register for this.

It’s been a while since i used plex, but if i remember correctly there was a setting in plex where you could define which subnets plex sees as local. By default it should only show the internal docker network that plex uses, but you should be able to add your LAN subnet and it should then play media directly.

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On Plex:

Enable Treat WAN, disable Relay - if not mistaken that should fix things for you.

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Unfortunately, it didn’t work. The TV and another PC do not see the Plex server

Oh - well that should at least have solved the relay issues. I was hoping you’d be lucky & it’d ‘just work’ for all your devices, but looks like @LarsR 's post is going to be next step & you’ll have to add your subnets: