SonicWall VPN error: XAuth failed and User authentication has failed

SonicWall VPN error: XAuth failed and User authentication has failed - Resolution with screenshots

Situation: The client has windows 2008 R2 as RADIUS server. When attempting to establish VPN on SonicWall Firewall, SonicWall Global VPN Client log viewer shows: XAuth failed and User authentication has failed.

Resolution: Uncheck Require valid certificate from server under user settings.

1. Login SonicWall

2. Navigate to Users>Settings.

3. Click Configure in the RADIUS + Local Users of Authentication method for login.

4. Click RADIUS Users.

5. Click Configure in Use LDAP to retrieve user group information.

6. Make sure Use TLS (SSL) is checked, both Send LDAP "Start TLS" request and Require valid certificate from server are unchecked.

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