Remote connection available on 5g but not wifi remotely

Server Version#: 1.43.0.10492
Player Version#: 4.156.0
<If providing server logs please do NOT turn on verbose logging, only debug logging should be enabled>

All plex apps I use whether it be on plex mobile app, android TV app or desktop app aren’t able to remote connect to plex server over wifi outside of local network, but are able to connect through mobile data. Any ideas to what could be causing this? I’m using plex linuxserver io image in docker compose.

Would wiping my config file and starting with a fresh plex docker container remedy this or is this more of a router issue?

That sounds more like an issue with your network setup/config, not Plex. Specifically the remote network from which you try to connect to your server.
If you had an issue with the server’s remote access configuration, you should also see issues when connecting from a 5G connection.

Could be an issue with the DNS configured in the remote network (WIFI) or some filtering.

How would I go about tackling this? The weird thing is everything was working fine before. I unclaimed the server one day and reclaimed it and boom everything broke besides cellular.

I would start checking the router config of the remote network (WIFI). Specifically have a look what DNS server it’s using and try changing it to Google (8.8.8.8 or 8.8.4.4) or CloudFlare (1.1.1.1).
Beyond that, it’ll very much depend on what kind of router this is (make, model).

So the router I’m using for the server local network is a tp link deco x60 and it’s dns is already set to 8.8.8.8, 8.8.4.4. The remote router is a optimum provided router/modem combo which doesn’t have a setting for dns change. I just don’t understand why break now after years of the remote connection working.

So nuking the plex container and config folder wouldn’t change a thing you think?

In Plex Media Server Settings → Remote Access, does it say “Fully accessible outside your network”?

If it does show “Fully accessible…”, then play something via the mobile network. Monitor playback via Plex Dashboard → Now Playing + Expanded View. Is the connection local, remote, or indirect?

So it is fully accessible, but only works on 5g cellular data. It only doesn’t connect on external wifi networks.

This is on 5g cellular. On wifi I get server is unavailable.

Do you know if it’s ALL files that won’t work for you, or only ones that require transcoding? I’m having a similar issue. It started with the latest server update. Anything that can Direct Play works okay, but a file that requires transcoding (as does the one in your screenshot) doesn’t work. It WILL work, however, on my cell, with wifi turned off, which I think is what’s happening for you, if I understood your post.

I WAS able to get files to work if I “optimized” them through Plex. But that’s a pain because it creates two versions of the file and cuts your storage in half. You might try taking that file above and optimizing it for TV through Plex and see if you can play it on your wifi devices. You have to go to the menu (three dots) and choose “play version” I think, and then choose the plex version you optimized. That should at least tell you if it’s a connection problem or not.

BTW, I also tried deleting the config folder data (and transcoding folder data) early on, and let Plex rebuild. No joy.

So no my issue isn’t transcode. Transcoding works fine. My issue is remote access on external wifi, so anything outside my local network. The only remote connection that works is mobile data.

Please use Plex Dashboard. Would like to know if the connection is remote or indirect. That information is not displayed in the screenshot from Plex Dash.

If indirect, it is an indication that remote access is not working correctly.

If remote, then Plex remote access is working correctly, and the problem is on the far end.

I’m not able to get on a computer right now but here’s proof from plex mobile app that’s it’s a remote connection.

Thanks. That shows remote access is working and the connection is not via Plex Relay (indirect).

Have you tried from different remote locations on wi-fi?

As @tom80H mentions, this points to a problem at the remote site.

There is nothing to change on the server end.

So multiple people I share my libraries with experience the same issue where wifi on their local network shows plex server offline and when they switch to cellelur data it connects instantly.

The only thing I could try is attempt what @tom80H mentioned, but I need to buy a separate router with dns settings because the current router I have doesnt have a dns setting. The server is at my parents place that’s why I say I need to buy one for my place lol

@FordGuy61 this is what happens on my house wifi. The server is at my parents house.

@tom80H @FordGuy61 Thank you guys for the tremendous help. Tom was spot on with it being a DNS issue.