I have multiple friends who have shared their Plex Server with me. I was on Time Warner until about 2 weeks ago. I have never had a problem when on TWC. Since switching to ATT I have had nothing but problems. It doesn’t matter what device I connect from or what server I connect to, anytime I try to play a movie it buffers every 20 seconds or so. I can stream google, youtube, hbo, showtime or any other service from these same devices and it works fine. My speeds are over 900 up and down. The really odd thing that I found in troubleshooting is that I can play a 720P movie on its highest setting and it works. If I play a 1080P movie I can turn it down to 2mb or below quality and it will work. So it gives you the illusion that the speed is not fast enough. Even though it is. I called At&t and of course they were no help. They said the problem was Plex even though I could prove to them that it wasn’t. That being said is there something special that has to be done to get this working on AT&T Uverse? I put one device on the DMZ opening it up to all services and it still didn’t work. My specific router is pace 5268AC.
Just an update on this. Today I tried it at work. We have two internet connections. We have one TWC Fiber connection and one AT&T Fiber Connection. Both Business Class. I tried using Plex from the web on AT&T from different computers and it does the exact same thing as my house. I switch my connection to TWC and it works with no problem. So there is definitely something going on within AT&T. I just have no idea what the problem is.
It’s probably the router that AT&T provides. There are some threads that talk about it. Not sure how to fix it, other than putting their router/modem into dumb modem mode and installing a router that you can control better.
I was under that same impression yesterday but now that it is happening at work that would rule out that possibility. Work is Business Class Fiber. It is not under an AT&T router/Modem. It is all Cisco Gear which I control. So I know that it isn’t in the gear. Because that same gear is connected to the TWC connection. Everything between the pc’s and the internet are the same. The only difference is the providers.
I’ve noticed the same problem since switching to ATT Gigapower at home. Have you had an luck identifying the problem?
Yeah same here. Had brighthouse no issue get gigapower now plex is on dialup.
I’ve been using AT&T Gigapower with very little issue since around November. It took a while to get the firewall settings working but has been fine since.
Something is weird I can direct play with Emby fine 40-50mbits. Plex direct play hits about 10mbit then buffers. ONly plays smooth around 5-7mbits.
Just did a test with openvpn direct connection remote play I can stream original files with Emby at 50mbit with Plex 5-6.5mbit.
Tested this with Plex for ShieldTV, Linux, and Windows all the same. Clients: Android, chrome web player all the same result. Emby streams just fine over vpn and without using their app and chrome player.???
Older version of plex fixes this issue running 1.3.4.3285 I just pulled 50-60mbit remotely!!! Doing some more testing.
Interesting…I have had AT&T GigFiber for about a year now, and have had ZERO issues. I am on the 1.3.4 building which you stated above as working better.
@daveposh said:
Older version of plex fixes this issue running 1.3.4.3285 I just pulled 50-60mbit remotely!!! Doing some more testing.
That is interesting. This sounds vaguely familiar to the topics discussed over in the Plex Pass Forums. I don’t know if you have access to them but people have been saying similar problems that newer versions of Plex make remote streaming really sucky.
I’ve been lurking a lot trying to follow this issue, as I am suffering from the same problems.
https://forums.plex.tv/discussion/263713/slower-speeds-from-remote-server#latest
https://forums.plex.tv/discussion/263782/remote-access#latest
Also there are a couple comments in this reddit thread saying that people are still having trouble remotely streaming from Plex, even though they can saturate upload on FTP transfers. And that’s for PMS 1.5.0.
All I know is that this is a widespread problem and I know that there are quite a few threads and comments trying to diagnose what’s the problem. I hope that it can be fixed soon, as to me it’s a lot more important to have a smooth remote stream than any other feature. The web app can look pretty all day but it doesn’t matter if I have problems streaming remotely. :neutral:
As well as a tool called iperf3 https://iperf.fr/iperf-download.php
I’d blame the routing/switching/peering…
For me its not a peering issue. All I did is switch versions plex 1.3 to 1.4. I can direct stream with emby just fine and on Plex 1.3.4. Other people are seeing this same issue with the recent versions of Plex. I bet it has something to due with the newer feature upload limits.
I just changed to AT&T GigaPower too and have a 5268AC router that my server is wired directly into (might get a separate router if determined that will help), but I’m nor real adept at router configuration. Has anyone gotten Plex working through that config?
Has anyone been able to resolve this issue? I upgraded last week to AT&T GigaPower and since have not been able to remotely access my server. I see no point in maintaining my Plex Plass if I can’t use it.
I’m in the same boat. We just recently made the switch and now out of network it’s an indirect connection, but internally it’s obviously fine connecting to the local host address. The way I have it connected is from the ATT modem/router to my firewall (pfsense) which then goes to my vmware box. To my understanding I think this could be resolved by putting the ATT modem/router into dumb mode by removing all the routing features of it and running everything through pfsense. However, we have some things that need a direct connection without going through our main firewall. If someone has any ideas I’m welcome to them. Thanks!
@Zalera said:
I’m in the same boat. We just recently made the switch and now out of network it’s an indirect connection, but internally it’s obviously fine connecting to the local host address. The way I have it connected is from the ATT modem/router to my firewall (pfsense) which then goes to my vmware box. To my understanding I think this could be resolved by putting the ATT modem/router into dumb mode by removing all the routing features of it and running everything through pfsense. However, we have some things that need a direct connection without going through our main firewall. If someone has any ideas I’m welcome to them. Thanks!
I was able to fix the problem. The problem didn’t sit at the ATT modem/router end. It was at the firewall. I did some further digging and found that it was the VPN that was causing the problem. However, Plex wasn’t suppose to be going through the VPN. I double checked all of my settings and they were correct since Plex was suppose to bypass the VPN and go directly out. I had to turn off the VPN, then restart the VPN, and then reboot the firewall. Everything works now 
How to get Plex remote access working on AT&T Fiber/U-verse:
- Access Pace modem and go to firewall section and select your personal router in the “Applications, Pinholes and DMZ” section.
- Set your personal router to be in DMZPlus mode (allowing the public IP address generated by AT&T to be passed directly to your router).
- Power off your router, then the AT&T supplied one. After this is done, power on the AT&T router and wait until the “Service” light illuminates. This can take some time, mine took almost 2 minutes before it was back up again. Then power on your personal router. After it reboots, it should have the public IP address generated by AT&T.
- Access your personal router’s firmware webpage. Reserve a local IP address for the server that is running Plex Media Server. This will insure that if the computer gets rebooted, it will have the same static internal IP.
- Next go to the port forwarding section of your router’s interface and set an open port of “32400” on the static IP that you assigned to your Plex server (this is the port that Plex uses for transmitting data remotely).
- Finally, go into Plex Media Server under settings and check the port forwarding box and make sure that the empty port field is filled in with the number “32400”.
- Click reconnect, and you should be connected and good to go. If this doesn’t work at first, don’t panic. Exit fully from Plex and restart the app and it should connect.
Hopefully this helps out other people, I just recently made the switch from cable to fiber and man are these upload speeds nice. 
