I have seen several posts about VPNs not working with T-Mobile Home Internet. What is T-Mobile's plan to address this? I contacted my corporate IT department and they said it's not their VPN. All works fine on my old ATT home internet and Verizon Hotspot (work cell). Maybe I should drop T-Mobile Home Internet and go back to ATT.

SOLVED! After days with my IT department and then with Global Protect in Pali Alto, here's the bottom line. T-Mobile High speed broadband can't handle IPv6 dynamic IPs therefore can't communicate in internet. Global Protect can only handle IPv4.There are no settings on T-Mobile gate way to make it just use IPv4.Global Protect doesn't have a fix/VON software to fix this advanced IPv6 communication I can access my company's server for data files, outlook for email etc, but cannot access internet based apps like one login or any websites. Except MSN.com - explain that. Not even Google. Com.Have to switch to my Verizon cell data hotspot to my company laptop to access internet. Then switch back to T-mobile when done with internet T-Mobile is using advanced technology that companies are not ready to handle, and will take them a long time to become compatible.Since most users don't have IOv6, there's no rush to upgrade corporately. For example, they advise that all the scanner guns in our warehouse aren't compatible with IPv6, so if they upgrade VPNs now, none of the equipment would work in the warehouse.Nor are VPN providers putting resources into IPv6 compatibility.im so annoyed that I switched to the T-Mobile high speed broadband new technology that NO ONE at T-Mobile advised this would be an issue. Even calling tech support, they had no idea what the issue would be. After my IT department figured it out I HAD TO CALL BACK T-MOBILE AND BRUNG THEM UP TO SPEED. Am I in the twilight zone? Ridiculous So much for all this infrastructure across the US. If we get this new technology, then can't connect with old technology being used by 99% of corporations, then we're screwed until they decide to upgrade.How can this be such a mystery in 2021. IPv6 has been in development for more than 10 years. WHAT's the holdup and lack of warning of the issue.So annoyed that I switched to this with no heads up. I'm screwed now unless I switch back to my unreliable Cox cable internet that had service outages at least twice a week while I've been working from home.

Just got my new T Mobile gateway and set it up. Exact same issue with exact same VPN. Nothing works on it!

I can confirm that lowering MTU worked for me. I set it to 1300.

Well looks like two years later and this is still an issue… Tried calling T-Mobile tech support and they couldn't downgrade or upgrade my firmware. So they put in a ticket to engineering. Fingers crossed.

No luck so far. I even had T-Mobile roll back the version of my gateway's firmware, because I had heard that fixed the problem for some people. The service rep said he couldn't do it, but when I said I needed to cancel my service then, suddenly it became possible. It did get a little better, some web pages eventually load, but it's still not usable.I have one last thing to try. There are some people who say lowering the MTU setting for globalprotect to 1350 or less might solve the issue. I doubt it will work, but I'm going to try it. I don't have access to do it myself, but I'll try to get the IT guys to do it when I'm in the office on Tuesday. If you have admin access on your machine you can try it yourself:netsh int ipv4 set subinterface "Ethernet 2" mtu=1350Replace "Ethernet 2" (keep the quotes) with whatever name your computer uses for the globalprotect virtual interface in ipconfig.

GlobalProtect VPN not working with T-Mobile

VPN_on_5G
Newbie Caller
Hace 9 meses
I spoke with a T-Mobile support person on 19-FEB-2024 who said the MTU setting needs to be 1300. This is what I did and it works for me (W10); your mileage may vary.
Disconnect from GlobalProtect VPN

Open Windows Control Panel

Open Network and Sharing Center

Click Change Adapter Settings

Right-click the ethernet connection with the subheading PANGP Virtual Ethernet Adapter Secure

Select Properties

Click Yes

Click Configure

Click the Advanced tab

Click MTU

Change the value to 1300

Click OK

Close all windows

Connect to GlobalProtect VPN and wait several minutes to ensure you don’t lose internet connectivity
Sergiosc22
Roaming Rookie
Hace 10 meses
Venkatcyclops wrote:

Thats great. I tried that, but it didn't work. I first tried the 1300, did not do anything, but when I changed it to 1350 it worked for a couple of minutes. After that it didn't. No Internet when connected to LAN.

What happened to me was that at some random moments, MTU moved back to what it was, so I had to change again
Venkatcyclops
Network Novice
Hace 10 meses
When I spoke with escalated tech support, they mentioned that the issue between VPN and T mobile home Internet persists. So I need to switch to another Service provider, unfortunately.
It was working fine until three months ago. Until then I had only one network that is 2.4 GHz. Then I changed it to a 5 GHz , that's when problem started. Ever since then, I tried multiple things. Reset router to factory settings, created 2 separate networks for 5 GHz and 2.4 GHz.
I tried connecting to the router using a LAN cable, it worked for a few minutes, but eventually that also stopped.
Venkatcyclops
Network Novice
Hace 10 meses
Sorry, VPN
Venkatcyclops
Network Novice
Hace 10 meses
Thats great. I tried that, but it didn't work. I first tried the 1300, did not do anything, but when I changed it to 1350 it worked for a couple of minutes. After that it didn't. No Internet when connected to LAN.
Sergiosc22
Roaming Rookie
Hace 10 meses
Venkatcyclops wrote:

Same issue.

Just FYI, adjusting MTU as mentioned on this topic, resolved for me
Venkatcyclops
Network Novice
Hace 10 meses
Same issue.
AlfredD
Network Novice
Hace 10 meses
Good grief. My router had been working for 4 years with Global Protect and the same problem showed up suddenly last week… Upgrading the firmware did not fix the problem. Getting a new router and hope the problem would go away. I'm wondering what kind of tests did Palo Alto Networks do w/ major carriers…
Sergiosc22
Roaming Rookie
Hace 11 meses
dlanza0967 wrote:

Well looks like two years later and this is still an issue…

Tried calling T-Mobile tech support and they couldn't downgrade or upgrade my firmware. So they put in a ticket to engineering. Fingers crossed.

Good, my support guy wouldn't even do that. Then I got a survey where I said that I was dissatisfied and that my issue remains, they asked if they could get in contact, to which I said yes... But they never dis
dlanza0967
Newbie Caller
Hace 11 meses
Well looks like two years later and this is still an issue…

Tried calling T-Mobile tech support and they couldn't downgrade or upgrade my firmware. So they put in a ticket to engineering. Fingers crossed.