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Problem with Connecting to a VPN

I have a couple of VPN connections that work fine. But, one specific connection gives me the following error: "It was not possible to verify the identity of the server". Using my Android phone with the same exact login credentials, I am able to connect to the VPN without any problems. However, when I try to do so from my computer, I get the above message.

I have a Surface Pro 6 with Windows 10 updated to the most recent update (20H2).

Any suggestions on how to get this to work?

Thanks.

Steve

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The explanation of error 778 is “It was not possible to verify the identity of the server“. There are several possible causes of this problem.

1.The network connectivity has problem. Please verify the network connectivity of VPN server. We could ping the server from the client with the server’s IP address. And L2TP uses the UDP 1701, please verify the port was opened.

2.The VPN server can’t authenticate the user account. So please check the about all settings.

In addition, have you looked all related logs in the VPN client and the VPN server? To troubleshoot this issue, these logs are very useful.

To check about all settings about L2TP VPN setup, please refer to the link below,

Checklist: Implementing a VPN Remote Access Server Design


Best Regards,

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>But when I am outside my home and try to connect through a different WiFi, I get the error previously posted

Does your router allow  VPN connection from outside ? what is your router manufacturer name and serial number

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I am able to connect to the VPN with my phone from any Wifi outside the home. I am not able to connect to the VPN with my Surface Pro 6 outside my home.

I am using an ASUS RT-AC66U router with VPN capabilities.

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I am able to connect to the VPN with my phone from any Wifi outside the home. I am not able to connect to the VPN with my Surface Pro 6 outside my home.

I am using an ASUS RT-AC66U router with VPN capabilities.

VPN blocked on Windows 10

 

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if you can not connect to VPN try these steps

Open Device Manager (winlogo+X)

Find Network Adapters

Uninstall WAN Miniport (IP), WAN Miniport(IPv6) and WAN Miniport (PPTP).

Click Action > Scan for hardware changes

The adapters you just uninstalled should come back

Try connecting again

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I can try that, but I am able to connect to other VPNs, just not the one home VPN. That is what is so frustrating. 

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Yes I understand your frustration. It happens to all of us then we won't give up until we find the solution.

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Has anyone found a solution in the meantime?

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Just thought I would respond and say I have not found any solution for this problem.

I am able to connect to the same specific VPN with my phone, but cannot connect to this same specific VPN with my computer.

I am able to connect to other VPNs on both my phone and computer without any problem.

I have tried every solution suggested. None of them works.

Thanks.

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Last updated April 24, 2024 Views 5,602 Applies to: