Port forwarding for Plex is not working

[marvin_unnamed]

Hello,

I have opened port 32400 (TCP) for Plex in the Fritz!Box 7520 for IPv4 and IPv6. I have deactivated the relay and enabled remote access in the Plex Media Server. However, others cannot access my Plex media library. Clicking the “Try Again” button did not change anything.

Both the manual port option and the automatic option produce the same result. Even trying a different port than 32400 did not work.

The Fritz!Box tells me that the port forwarding has worked, but port checkers cannot access my public IP.

I have checked that the device is correct using cmd. I have also tried to set up the Windows Firewall using outgoing rules, but it did not work.

I have currently disabled my VPN.

As a test, I briefly set myself as an exposed host, but it did not work either.

I have also restarted the router and the Plex Media Server.

Version 1.31.1.6782

What else could I try? Does anyone have any ideas?

Regards

[tom80H]

If your forwarded port isn’t visible from the outside that sound like your ISP might be blocking that particular traffic.
Another scenario could be your ISP placing you in a CGNAT where your router’s WAN IP address is no longer a publicly routable IPv4 address but “hidden” within the ISP’s network.

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…

[marvin_unnamed]

@tom80H

If your forwarded port isn’t visible from the outside that sound like your ISP might be blocking that particular traffic.
Another scenario could be your ISP placing you in a CGNAT where your router’s WAN IP address is no longer a publicly routable IPv4 address but “hidden” within the ISP’s network.

I tested a bit further, I can do it in a Linux Mint VM. That means it must be because of the Windows Firewall.

[marvin_unnamed]

Avast Antivirus seems to have been the problem for me. Although that has been disabled for weeks, it seems to have been a nuisance. I uninstalled the program, since then everything works as it should.