Plex treats local devices as remote after a VLAN split
After the home network was divided into VLANs, a running in Docker on the Lab VLAN (192.168.20.0/24) began treating TVs, phones, and PCs on the Home VLAN (192.168.10.0/24) as remote devices. Entering the server's directly still allows normal login, library browsing, and media playback.
Routing between the VLANs works, the firewall allows traffic from Home to Lab, and Plex's port 32400 is reachable. Docker uses , and Plex listens on every .
Both address ranges are also listed as trusted networks in Plex, but its TV, mobile, and s continue to label the connection as remote. Restarting Plex and checking its network settings did not help, leaving discovery or local-connection detection across a VLAN or subnet boundary as the suspected cause.
Key points
- The is on the 192.168.20.0/24 Lab VLAN.
- TVs, phones, and PCs are on the 192.168.10.0/24 Home VLAN.
- Direct access by server IP allows normal login and playback.
- Routing, firewall access, port 32400, and trusted network settings have been checked.
- Plex apps still classify the server as remote after a restart.