Hi everyone, I’m having an issue with my Unraid server and hope someone can help me figure this out.

Setup:

.Unraid server running the latest stable version.

.Plex is installed in Docker and assigned to a static IP via br0 interface: 192.168.1.30

.Other Docker containers (e.g., Jellyfin, qBittorrent, etc.) are on the bridge network with the host IP 192.168.1.25

.I have port forwarding set up on my router (Mikrotik AX3) to expose 192.168.1.30 to the internet — Plex is accessible externally and works fine.

.Nginx is installed on the Unraid server (host or Docker, I've tried both) and is meant to reverse proxy traffic to Plex using a domain name.

Port forwarding is set up on my Mikrotik AX3 router, and Plex is accessible from the internet. However, Nginx running on Unraid can’t reach 192.168.1.30, so reverse proxying via domain fails (502 Bad Gateway or timeout).

From Unraid’s terminal, ping 192.168.1.30 doesn’t work, though the IP is accessible from other devices on the LAN.

It feels like Unraid treats the br 0 container as a separate physical device.
Do I need to enable some kind of multicast or proxy ARP, or use a different approach to make internal communication possible between the host and the container on br0?

set that to enabled

Now everything works. Thank you very much.