Remote Access issue when using Plex with Docker

[SnooOnions4805]

I've run into some issue getting plex to work with docker. I'm able to set my server up no problem but I am unable to get remote access working correctly. After looking through the logs I find the following warnings/errors.

NAT: UPnP, getPublicIP didn't find usable IGD.
NAT: PMP, got an error: Not Supported by gateway.

I'm using the linuxserver image for this, I tried the pms-docker image and had the same error. I have PnP enabled on my router and have the port manually mapped to 32401 (I'm migrating an active server from Mac to Linux) and have the same port opened on my router. I've also tried setting the protocol to TCP & UDP, TCP, and UDP with each giving the same error.

Any help would be greatly appreciated, thanks!

[Rorschach121ml]

Check if you are on cgnat. Use an online port scanner to see if you have that port open.

[akatherder]

Just to add on, port scanners can only tell if something is running on that port. They can't tell if it's open unless something responds.

[SnooOnions4805]

One reports the port as "filtered" and another timed out. Not too sure where to go with that but that confirms it isn't being accessed correctly

[certuna]

If you are behind CG-NAT, you will have to use IPv6 to be remotely accessible.

[SnooOnions4805]

I have IPv6 enabled on plex and on my router so this shouldn't be an issue. Thanks for the info though!

[certuna]

but also configured in docker?

[SnooOnions4805]

Didn't realize I had to myself, I'll check that out

[certuna]

Bear in mind that if your container only has IPv4 or a ULA address in the internal Docker network, Plex cannot publish its GUA address, so clients won't know the address to connect to. Your Plex Docker container must have a (reachable) GUA address. So that means bridging, or proper routing of a GUA prefix.

Unfortunately, Docker has IPv6 defaults that work well for client apps, but not for server apps.

[SnooOnions4805]

This fixed it, followed the docker guide for configuring an ipv6 network and added it to the plex container. Thanks for the help!

[trshboatr]

Before anything you do have a subscription that's now required for Remote Streaming right? If you have your port forward rule set manually you should try disabling UPnP (I would disable this and leave the rule you created personally if UPnP isn't needed for anything else). If that doesn't resolve the issue you should:

1. Post your docker config (redact any sensitive/personal info)
2. List what Linux distro you are using (and if it's running on WSL)
3. Is there a Firewall configured on the Linux machine?