Loss of remote connection and restoration via the "retry button"

Server Version#: 1.40.0.7998
Player Version#: —

Strange behaviour (since last update?):
Plex server setup for remote access. Worked without any problems.
Now:
The server is not accessible. On the administration interface for remote access it says “not accessible from outside” (see screenshot)
On that same page, pushing the retry button will immediately show “fully accessable” (see screenshot) - and the server is accessible from outside.
But after a few minutes the server is unavailable again. Pushing the button will make it immediately available again, but after a few minutes…

I haven’t changed anything at the firewall, router or Plex-setup.


only pressing “try again” leads to

From your symptoms, I’d say you’ll need to switch from UPnP to a manually created port forwarding.

I do have a manual port setup in the FritzBox.
Worked like charme and I didn’t change anything at the Fritzbox-Settings.
:thinking:
And what’s strange: When I hit the “test” button it switches to “everything’s fine” - just to not work again after a while…

If you do have that, you’ll need to tick the checkbox in your above screenshot and tell Plex the public port number you’ve used your port forwarding.

Strange. Haven’t seen that it was unchecked. Since I configured the standard port for port forwarding, I’m quite sure it worked without that checkbox. But I’ll give it a try… :blush:

… and it seems that the unchecked checkbox was the solution.
Thanks @OttoKerner! :pray:

I have had the same issue as the initial post.


With the last update, I lost the connection to my internet. If it reconnects though, it is for less than a second. I have never touched the setting for my router or plex since I set everything up over 6 years ago. This is the first time that I have had this problem.

If I may add to Otto,

  1. Remote Access will always turn Green when you click it (Opportunistically)
    – If it’s unable to verify the connection (Plex.tv replies) then it turns RED again a few seconds later

There are to parts to making Remote Access always work.

Configuring the Synology

If your Synology Firewall is enabled, Ensure you’ve created a rule which allows DSM port 32400/TCP to accept traffic.
– ALL inbound PMS traffic for Remote Access will come here.

Configuring the modem/router

This is where things usually go awry.
Modem/routers can be configured manually or automatically.

  • Manual port forwarding is where you create a NAT/Gaming/Port Forwarding rule in the modem router to send all traffic received on the port you want to use to port 32400 of the Syno.
    Every modem/router should allow you to log into it (directly or have an app for your phone or browser URL for cloud-based devices)

  • Automatic port forwarding is where PMS sends a request for a port to be allocated (UPnP - Universal Plug-n-Play protocol — Often known as ‘Plug-N-Pray protocol’).
    – With UPnP, there is table of the allocations. The most common failure of UPnP is when that table fills and no more can be allocated. This is where you need to go into the modem/router and delete the old entries.

  • The most stable method is:

  1. Decide on which WAN (Internet facing) port you want opened (5120 → 65535)
  2. Confirm your Synology’s DEFAULT ethernet port is configured as STATIC assigned (so it doesn’t change)
  3. Sign into the modem/router and create the NAT/Gaming/Port Forwarding rule from the port you want to use to Syno_IP_Address:32400/tcp
  4. Open Settings - Server - Remote Access
  5. Switch to Manual Port mode
  6. Type in the port number (the WAN port number)
  7. Click “Retry”

My pfsense router

My Plex configuration

If anyone needs help finding where the settings are in their modem/router,
Please share the Make and Model here. We’ll lookup the manual pages for it and then point you to what you need to do.

@spiderff Did you try to check the “Manually specify public port” and enter the default port of 32400?
This solved the problem for me.
(seems to be a tiny buy)

Not working for me.

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.