Error Message:

The L2TP connection attempt failed because the security layer could not authenticate the remote computer.

Explanation:

Your connection might be failing for one or more of the following reasons: Your user name and password credentials are incorrect. The certificate your computer is using expired. The certificate the server is using expired. If you are a member of an Active Directory domain and need to request a certificate, see To request a certificate. If you are not a member of an Active Directory domain, or you need to request a certificate from the Internet, see To submit a user certificate request via the Web.

User Action:

Contact your system administrator.