How to Resolve Unifi VPN Access RAS/VPN Server Error for Windows 10

In this tutorial I will show you how to resolve Unifi controller version 6.1.71, Unifi VPN Access error “The Connection was prevented because of a policy configured on your RAS/VPN server. Specifically, the authentication method used by the server to verify your username and password may not match the authentication method configured in your connection profile. Please contact the Administrator of the Ras Server and notify them on this error.”  

There are only a few steps you need to take to resolve the RAS/VPN server VPN Access Error.

  1. Log into your Unifi controller version 6.1.71. This should also work with newer and previous versions of the Unifi controller software.
  2. Click on Settings
  3. Click on System Settings
  4. Click the New User Interface slider to turn it off.

  5. You will be prompted with a popup, click the red [ Deactivate ] button.
  6. You should now be viewing a classic version of the Unifi Controller software.
  7. Click on Settings
  8. Click on the Networks tab.
  9. Locate your VPN Access network and click the Edit icon.
  10. Go down to the RADIUS section and check mark the box for “Require MS-CHAP v2” and then click save.
  11. Go ahead and test the VPN access now. This setting change should have successfully resolved the “The Connection was prevented because of a policy configured on your RAS/VPN server.” error message you were getting. 

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