Pre-authentication Failed

Problem: You may have entered your password incorrectly.

Solution: Confirm that you entered the password correctly. Passwords are case-sensitive. Make sure that the Caps Lock key is off, and then re-enter your password.

Problem: KDC requires you to perform pre-authentication, but you have not configured it.

Solution: Verify your host authentication settings.

Problem: The KDC does not support the preferred encryption types specified in Kerberos Manager.

Solution: Change your list of preferred encryption types to be compatible with those supported by the KDC.

Problem: The KDC to which you are authenticating requires TCP protocol for packets over a certain size (this is seen on some Windows KDCs).

Solution: Try changing the value for Maximum UDP packet size to less than 1500.