### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [August 20, 2025, 10:34pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/1 "2025-08-20T22:34:41Z")
Server Version#: 1.42.1.10060
While I’ve done my best to investigate the issue on my own, I’ve run up to a brick wall now. I am unable to claim my Plex server through the web app, while running on a local machine. The machine running PMS is running Ubuntu Server, if that matters.
When I attempt to press the “Claim Server” button, it simply spins for a second and returns to saying “Claim Server”. The logs seem to indicate some kind of connection issue regarding connections through port 443. I have allowed that port through Ubuntu’s UFW firewall, but that didn’t seem to change anything.
[Logs.zip](https://forums.plex.tv/uploads/short-url/2oE1e8LRd2Ot9PigbtkFZaMUMdV.zip) (154.5 KB)
---
### Author:  [@FordGuy61](https://forums.plex.tv/u/FordGuy61)
#### Post date: [August 20, 2025, 10:50pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/2 "2025-08-20T22:50:32Z")
Plex Media Server cannot communicate with hosts at plex.tv.
- Verify the network settings are correct: ip address, default gateway, network mask.
- Configure the server to use a public DNS such as 1.1.1.1 (Cloudflare), 8.8.8.8 (Google), or 9.9.9.9 (Quad9).
- Drop the firewall, at least temporarily, for testing purposes.
You can also try the [User Credential Reset Utility](https://github.com/ChuckPa/UserCredentialReset).
---
### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [August 20, 2025, 11:26pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/3 "2025-08-20T23:26:50Z")
Firewall disabled, DNS is already set to 1.1.1.1, No change. I did make sure to restart the server after disabling the firewall.
As for my network settings, I’m not entirely sure I understand which set you’re referring to. Server? Client? Router?
---
### Author:  [@FordGuy61](https://forums.plex.tv/u/FordGuy61)
#### Post date: [August 20, 2025, 11:56pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/4 "2025-08-20T23:56:38Z")
The server. It cannot talk to systems at plex.tv. That is why claiming fails.
If the settings are incorrect, then the server would have trouble accessing any site on the Internet, but it never hurts to double check them.
Examples from my Ubuntu server:
This shows the IP address and netmask.
```auto
$ ifconfig
enp1s0: flags=4163 mtu 1500
inet 192.168.1.46 netmask 255.255.255.0 broadcast 192.168.1.255
```
This shows the gateway. It is usually the IP address of your router (unless you’ve multiple networks, routers, etc.).
```auto
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.254 0.0.0.0 UG 100 0 0 enp1s0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 enp1s0
$
```
---
### Author:  [@FordGuy61](https://forums.plex.tv/u/FordGuy61)
#### Post date: [August 21, 2025, 8:06pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/6 "2025-08-21T20:06:42Z")
Went over this again and had someone else take a look as well.
It is not a DNS problem. Otherwise there would be DNS lookup failures in the log file.
Something is blocking the Plex server communicating on port 443 to hosts at plex.tv.
Port 443 is the https port, so it is not normally blocked by firewalls.
You mentioned the Ubuntu firewall was disabled. Maybe double check it is still down or re-issue `sudo ufw disable` to make sure?
Anything else in your network that could block the traffic?
---
### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [August 22, 2025, 5:16am UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/7 "2025-08-22T05:16:10Z")
This is a bog standard home wifi network, there shouldn’t be anything in the way, and I wouldn’t even begin to know where to look.
I disabled the firewall, ran a clean install. Nothing seems to have changed. Is it possible I have to forward the https port? Should I try pinging something over https first?
---
### Author:  [@ChuckPa](https://forums.plex.tv/u/ChuckPa)
#### Post date: [August 22, 2025, 6:09am UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/8 "2025-08-22T06:09:25Z")
Looking at your forum account, I see an IPv6 address without IPv4
The forums are IPv4 and IPv6
Try this, You should get this response:
```auto
[chuck@lizum ~.2005]$ curl http://plex.tv
308 Permanent Redirect
308 Permanent Redirect
nginx
[chuck@lizum ~.2006]$
```
When you look at the WAN IP of your modem router, do you see both IPv4 and IPv6 ?
I suspect you’ll only see IPv6
---
### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [August 22, 2025, 2:47pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/9 "2025-08-22T14:47:27Z")
When I run that curl command from my server, this is the response I get.
`curl: (7) Failed to connect to plex.tv port 80 after 24 ms: Couldn’t connect to server`
I’m not sure what the IP address tied to my forum account has to do with it. However, as far as I’m able to tell, I have both an IPv4 and IPv6 address on the router.
Edit: Just because I was curious, I ran that same command with [http://google.com](http://google.com) and [https://google.com](https://google.com) and was able to get a response both times.
---
### Author:  [@ChuckPa](https://forums.plex.tv/u/ChuckPa)
#### Post date: [August 22, 2025, 9:03pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/10 "2025-08-22T21:03:15Z")
I’m convinced there is a firewall / block somewhere between your server and plex.tv or your provider no longer supports IPv4.
1. plex.tv – bare domain is its own site (the services in the cloud
2. forums.plex.tv – this site
3. www.plex.tv – Account management and streaming video gateway
\*\* Plex.tv
```auto
[chuck@lizum Downloads.2018]$ nslookup plex.tv
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: plex.tv
Address: 52.17.59.150
Name: plex.tv
Address: 52.209.82.108
[chuck@lizum Downloads.2019]$
```
\*\* www.plex.tv
```auto
[chuck@lizum Downloads.2019]$ nslookup www.plex.tv
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: www.plex.tv
Address: 104.18.36.51
Name: www.plex.tv
Address: 172.64.151.205
Name: www.plex.tv
Address: 2606:4700:4400::ac40:97cd
Name: www.plex.tv
Address: 2606:4700:4400::6812:2433
[chuck@lizum Downloads.2020]$
```
\*\* forums.plex.tv
```auto
[chuck@lizum Downloads.2020]$ nslookup forums.plex.tv
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
forums.plex.tv canonical name = plex.hosted-by-discourse.com.
Name: plex.hosted-by-discourse.com
Address: 184.105.99.43
Name: plex.hosted-by-discourse.com
Address: 2602:fd3f:3:ff01::2b
[chuck@lizum Downloads.2021]$
```
At this point, the best next step is to contact your ISP and confirm `plex.tv` (the IPv4 addresses above) are not blocked.
---
### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [August 23, 2025, 2:32am UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/11 "2025-08-23T02:32:51Z")
> [@ChuckPa](#):
>
> or your provider no longer supports IPv4.
I can rule that out rather quickly. Spectrum internet supports both IPv4 and IPv6.
Performing nslookup just now has returned the following.
Plex.tv
```auto
stationmaster@stationmainframe:~$ nslookup plex.tv
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: plex.tv
Address: 52.209.82.108
Name: plex.tv
Address: 52.17.59.150
```
www.plex.tv
```auto
stationmaster@stationmainframe:~$ nslookup www.plex.tv
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: www.plex.tv
Address: 172.64.151.205
Name: www.plex.tv
Address: 104.18.36.51
Name: www.plex.tv
Address: 2606:4700:4400::6812:2433
Name: www.plex.tv
Address: 2606:4700:4400::ac40:97cd
```
forums.plex.tv
```auto
stationmaster@stationmainframe:~$ nslookup forums.plex.tv
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
forums.plex.tv canonical name = plex.hosted-by-discourse.com.
Name: plex.hosted-by-discourse.com
Address: 184.105.99.43
Name: plex.hosted-by-discourse.com
Address: 2602:fd3f:3:ff01::2b
```
Performing the curl command still returns the same results. (Which is to say, that it cannot communicate.)
I have checked my router settings, and as far as I can tell, there is no indication of any kind of firewall.
---
### Author:  [@ChuckPa](https://forums.plex.tv/u/ChuckPa)
#### Post date: [August 23, 2025, 2:56am UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/12 "2025-08-23T02:56:32Z")
What other equipment is running on your LAN between your computer (PMS server) and the ISP’s modem/router ? (Make & Model please if anything other than a simple switch)
---
### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [August 23, 2025, 3:10am UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/13 "2025-08-23T03:10:53Z")
You overestimate me, my good man. (Though I understand the need to account for every variable.)
The only thing between my router and the PMS server is an ethernet cable.
---
### Author:  [@ChuckPa](https://forums.plex.tv/u/ChuckPa)
#### Post date: [August 23, 2025, 3:17am UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/14 "2025-08-23T03:17:45Z")
Now for me to understand your ISP. (rolling eyes LOL)
When you look at the bottom of their modem/router, what model is it please ?
---
### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [August 23, 2025, 3:54am UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/15 "2025-08-23T03:54:09Z")
Sagemcom Fast 5280
Spectrum standard issue.
---
### Author:  [@FordGuy61](https://forums.plex.tv/u/FordGuy61)
#### Post date: [August 23, 2025, 9:09pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/16 "2025-08-23T21:09:33Z")
This is a strange one. I had Spectrum for years and never had trouble with them.
Try the nslookup & curl commands from another system and see if you have the same results. If on a Mac, use the terminal. On a PC, use the c:\ prompt.
---
### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [August 24, 2025, 9:38pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/17 "2025-08-24T21:38:13Z")
nslookup and curl both work as advertised on other machines, those are connected to the same network via 5ghz wifi.
---
### Author:  [@FordGuy61](https://forums.plex.tv/u/FordGuy61)
#### Post date: [August 28, 2025, 5:13pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/18 "2025-08-28T17:13:06Z")
I don’t know. To me, it seems the problem is with the Ubuntu installation, since nslookup & curl work on a different system. But troubleshooting such problems is beyond my Linux knowledge.
---
### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [August 29, 2025, 4:33am UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/19 "2025-08-29T04:33:01Z")
It’s possible. The Poweredge that it’s running on still has some bios level stuff floating around that I, admittedly, do not have the knowledge to interact with. The only thing I could think of would be the network controller having some dedicated filter, since it’s a former business machine, but that feels absurd.
---
### Author:  [@darganbright56](https://forums.plex.tv/u/darganbright56)
#### Post date: [August 29, 2025, 2:47pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/20 "2025-08-29T14:47:53Z")
This may not have any effect, but if you want to attempt a reversion back to an earlier PMS version, here is a link to [1.41.6.9685](https://downloads.plex.tv/plex-media-server-new/1.41.6.9685-d301f511a/debian/plexmediaserver_1.41.6.9685-d301f511a_amd64.deb). Just to rule out some issue with a recent version.
---
### Author:  [@ThePostmann](https://forums.plex.tv/u/ThePostmann)
#### Post date: [September 7, 2025, 7:05pm UTC](https://forums.plex.tv/t/unable-to-claim-plex-server/929857/21 "2025-09-07T19:05:41Z")
Well, time to finally put this to bed. The ultimate issue ended up being that my default gateway in my netplan file started at 192.168.0.1 when my new carriers IP range starts at 192.168.1.1. This explains why I could connect to it, but not receive any HTTP traffic.
[Next page](https://forums.plex.tv/t/unable-to-claim-plex-server/929857.md?page=2)