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IPsec VPN Windows 10 build-in

Dear community,

 

I have a problem with connecting to the VPN IPsec Client of a XG115. The Sophos Connect Client in the XG is running and configured with PSK. The User is created. Everyhting works fine from iPhone or iPad, equal if mobile data or wifi connected. But trying with a Windows 10 Client with the build-in VPN GUI in the same wifi fails with error "The L2TP connection attempt failed because the security layer encountered a processing error during the initial negotiations with the remote computer".

I already checked if the Service "IKE key generation module and AuthIP" (mentioned here https://community.sophos.com/products/xg-firewall/f/firewall-and-policies/96945/vpn-l2tp-issue-with-windows-10 ) is running. Second I already followed this guide https://community.sophos.com/kb/en-us/132253 but still it is not possible to connect.

A IPsec connection from the same Windows 10 Laptop to a Cisco Meraki is working fine, so I would say the Notebook is able to connect trough IPsec.

Is there someone who knows the problem? Thanks!

 

Edit: The Connection with the installed SOPHOS Connect Client and an imported tga file is running perfect. But the function build-in Windows 10 still is out of order.



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  • Hi  

    Thank you for sharing a detailed post.

    As per my understanding, Sophos Connect client is working fine but there is a problem when you are trying to connect L2TP VPN using built-in configuration using Windows 10 machine adapter and not able to connect.

    Please make sure that you have configured parameters as per the configuration article- https://community.sophos.com/kb/en-us/132253#Configuration%20using%20a%20Preshared%20key

    Please let us know which authentication method has been set for VPN adapter in OS and XG firewall.

    Are you using AD user to authenticate through L2TP VPN?

    Please share below command output. Please login console.

    1. console> show vpn configuration

    2. console> show vpn connection status

    Please try to connect L2TP VPN and same time execute the command console> show vpn L2TP-logs