How to fix my VPN connection using a Windows 11 laptop

Question

Hey,

I'm using a new Dell laptop with Windows 11 Enterprise. I'm trying to connect to my VPN, which is configured on an old windows server 2003 R2. The VPN connection works fine with windows 7 clients. But, with the Windows 11 laptop, I'm receiving the following message: "The connection could not be established because the authentication method used by your connection profile is not allowed to be used by an access policy configured on the RAS/VPN server". Is there any way to solve this issue?

Thanks!

Answer 1

Hello,

Configure the VPN client and the VPN server in conjunction with a remote access policy to use at least one common encryption method.

Verify that the settings of the remote access policy profile aren't in conflict with properties of the VPN server. For example, if the matching remote access policy profile specifies that the Extensible Authentication Protocol - Transport Level Security (EAP-TLS) authentication protocol must be used and EAP isn't enabled on the VPN server, the connection attempt is rejected.

Best Regards,
Karlie Weng

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Answer 2

Temporarily disable the firewall and try connecting again to see if it resolves the issue. You may need to configure firewall rules to allow VPN traffic if it does. If the issue persists, try uninstalling and reinstalling the VPN client software.

Open Device Manager:

• Look for WAN Miniport Network Adapters in the Device Manager.
• Right-click on them and select Uninstall device option to remove them.
• Since the WAN adapter is internal hardware, the scan will automatically reinstall the missing driver you just removed. 
• Reboot.

Open Command Prompt as Admin and type the following commands one after the other:
ipconfig /release
ipconfig /flushdns
ipconfig /renew
netsh int ip reset
netsh winsock reset