Long term Plex user, from the very beginning, used to use it across Windows, and then later Synology NAS, stopped using it because there was a change which broke it for me, because it’s used on a Public IP range! Somewhere there is a post, to this effect. But recently added into to a new Synology N…

[image] 69jvb: which broke it for me, because it’s used on a Public IP range Can you please expand on this? Are you saying that your private LAN is numbered using a public IP address block?

It’s a security mitigation. The server must be claimed initially via a private IP range. It would seriously be in your best interest for compatibility (not just with Plex) to renumber your network correctly. The subnet you’re using is from the 141.245.0.0/16 block, which is a public “owned” by Br…

[image] dbirch: Why doesnt your LAN meet RFC-1948? I’m sure it was just a typo, but it should be RFC-1918 . Just so there’s no confusion if they decide to peruse the RFC.

[image] 69jvb: Plex claim doesn’t detect the IP Address in use, because it only sees the router address which is Public This is incorrect. You will need to use something like GitHub - ChuckPa/UserCredentialReset: User Credential Reset utility for Plex or get both you and the plex server on a …

what this ? Attempting to obtain server token from claim token Token obtained successfully

[image] 69jvb: Why does the other Plex work on the Synology NAS ? - this is more the question? No, it’s not really. You’re running in a completely unsupported configuration. When things fail or work in an unsupported environment, you don’t have the luxury of pointing and saying “look, here’…

You’re using Docker, so you have the option of obtaining and providing a claim token at container creation time ( https://plex.tv/claim ). That can be added to your compose file or your docker run or however Synology or Unraid do it to claim the server right from the start. But you’re completely ign…

It is perfectly possible to use a public IP space for the Plex server machinee. But you will have to do the claiming differently. You could use this script for instance: GitHub - ChuckPa/UserCredentialReset: User Credential Reset utility for Plex

[image] 69jvb: Client and Server are on the same network! Notice I stated local network. Again, referencing the RFC (1918) linked above, local (private) IP ranges must be in the following: 192.168.0.0/16 172.16.0.0/12 10.0.0.0/8 Your comment disappeared, so I can’t quote the “Absolute Foo…

[SOLVED - Not supported Config!]Cannot Configure Plex Media Server ? on UnRAID in Docker

Plex Media Server

dbirch December 20, 2025, 8:34pm 5

Why doesnt your LAN meet RFC-1948? See Server setup wizard not authorized - #9 by zaitsev_p

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[SOLVED - Not supported Config!]Cannot Configure Plex Media Server ? on UnRAID in Docker

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