Help me connect to a VPN (L2TP connection failed)

[pask0o0]

Hey guys, so I have 1 pc in my office that won't connect to a VPN no mater what I try. A bit of a backstory, we have 3 office PC-s, and we need to start working remotly. The college that set up server and VPN is a proffesional, he does networks even for airports and that stuff. What I want to say is that I am 100% sure that VPN that he set up works. And other 2 PC-s connect to a VPN with no problem. Only 1 PC dosen't want to connect. When I try to connect it says: “L2TP connection attempt failed". So far I tryied everything I found on google or reedit or github. I even put fresh instal of windows 11, and I even tried a fresh instal of windows 10. Nothing. So guys plese if you know any way to get that PC to connect I would be happy. Btw if it helps, here are the specs of the PC in question: Gigabyte eagle AX B650 motherboard, Ryzen 7 9700X, 32GB of DDR5 crucial Ram, samsung 980 pro, RTX 4060. And yea before you ask. I even updated Lan, Bios, Wifi and every driver I could think of.

[Sawa Takahashi]

The simple thing to do is find what differs between those computers. Connection type (wifi, ethernet), which network they are using (home, same office, different office), the time of day (work hours, evening hours, night hours, week-ends).

If everything is the same for all three computers, then I'd check the credentials for connecting to the VPN. I don't know your particular VPN but some require you download a file to your computer (be sure the file is the right one and that it isn't corrupt) and/or username/password (make sure case is respected and special symbols are the right ones).

If that basic troubleshooting yields no answers to your issue, then you should probably try a variation on your hardware. Switch from wifi to ethernet or vice versa, use a dongle instead of motherboard's hardware.

Last thing I could think of is using a third-party app instead of Windows services.

Hope that helps somehow

[pask0o0]

35 minutes ago, Sawa Takahashi said:

The simple thing to do is find what differs between those computers. Connection type (wifi, ethernet), which network they are using (home, same office, different office), the time of day (work hours, evening hours, night hours, week-ends).

If everything is the same for all three computers, then I'd check the credentials for connecting to the VPN. I don't know your particular VPN but some require you download a file to your computer (be sure the file is the right one and that it isn't corrupt) and/or username/password (make sure case is respected and special symbols are the right ones).

If that basic troubleshooting yields no answers to your issue, then you should probably try a variation on your hardware. Switch from wifi to ethernet or vice versa, use a dongle instead of motherboard's hardware.

Last thing I could think of is using a third-party app instead of Windows services.

Hope that helps somehow

Alredy tried everything I can. I can't change my motherborad. But we all work at the same time.

[Windows7ge]

What credentials are being used to connect these computers? Does every client have their own or are the same credentials being used on all three because a limit can be enforced by the server to only allow so many client sessions from the same user.

 

If the credentials are different did you validate that the credentials are valid and work on any other computer?

 

It would be best to get the attention of the person who setup the hosting server. It makes things easier if your office is using client side software he expects you are using because he may have seen this error before and knows the common causes.

[Sawa Takahashi]

1 minute ago, pask0o0 said:

Alredy tried everything I can. I can't change my motherborad. But we all work at the same time.

A motherboard change seems overkill to me. Just try using a USB dongle to connect to wifi or ethernet. It will bypass the motherboard wifi/ethernet without changing the motherboard itself.

I know VPN connections are a pain to troubleshoot but you and the one who set up the VPN are the only ones that should meddle with this (for obvious security reasons).

Have a nice day !