Q. What does the "Authentication failed" error in Mac OS versions 10.5 onwards?

A. This error appears when either the user name or password has been entered incorrectly. The only other instance in which this message appears is when the connection ID you have received from Rakuten Broadband Premium does not match the service type from NTT. For example, if you are using a Mansion type fiber optic service from NTT but have received a Family type connection ID from us. If this is the case, please contact us so that we can update the connection ID or go to the Members Station and make the change there

Tags: 10.5, 10.6, 10.7, connection, error, internet, os