Port 443

[damageg]

Server Version#: 4.140.0
I’m running ipfire and the plex server (running on an Ubuntu 24.04 VM) is on the blue network.
When I setup remote access with port forwarding (no NAT), it initially connects then then disconnects. I did a tcpdump on the plex interface and I see two traffic patterns. The internal traffic (from green) is from a random port to 32400. The external traffic is from port 443 to a random port. The firewall is dropping packets with the error DROP_CTINVALID.

I added a firewall rule to allow traffic from port 443 to the plex server and the remote connection is stable. It seems like the plex remote servers are getting the packets mixed up after the initial connection.

I don’t see this anywhere in the documentation. Any ideas?

[tom80H]

The status indicator will show a green icon while it’s testing your remote access status.
So you best ignore that it seems to be briefly working… that’s just a false positive.

Not sure about your firewall situation.
Do you have a port forward in your router to correspond with what you describe (defined public port forwarding to tcp/32400 on the PMS host) and have you verified the router’s WAN IP is visible/accessible on the defined public port (e.g. using a service like canyouseeme.org)?

[damageg]

@tom80H

Do you have a port forward in your router to correspond with what you describe (defined public port forwarding to tcp/32400 on the PMS host) and have you verified the router’s WAN IP is visible/accessible on the defined public port (e.g. using a service like canyouseeme.org)?

I adjusted my port forwarding to be visible with canyouseeme. Thanks for that.
But still no luck.

[tom80H]

Did you already have a look at the related troubleshooting support article?

https://support.plex.tv/articles/200931138-troubleshooting-remote-access/

There’s also a guide with some more details on how to troubleshoot remote access issues.

The Basics of Remote Access Troubleshooting

When it comes to remote access, there’s a lot of different factors which can impact your setup. Some are under your own control, others not so much. First off… there’s a dedicated support article on troubleshooting your remote access. I strongly recommend you have a look at that. Find below some additional remarks on how to troubleshoot your remote access setup. Review your internet access / remote access configuration It’s good practice to review if Plex gets the correct public IP address…

[damageg]

I got it working. I don’t think it was working when I thought it was - false positive. Once I got the port forwarding right, it worked but it showed not working for a bit.