This is not correct. I've tried the LAN no-login settings and it does not work for many devices (Roku/smart tv/phones). They also fail if you're not on the same subnet as Plex.
For this infuriating reason, moving off of Plex is on my to-do list.
For this infuriating reason, moving off of Plex is on my to-do list.
edit:
You can also do this: https://support.plex.tv/articles/200890058-authentication-fo...