Ricoh IM C3000 User Guide - Page 290

9. Troubleshooting Message "Authentication has failed." W/L0406-003 "Authentication has failed." W0406-101 "Authentication has failed." W0406-107 "Authentication has failed." L0406-200 Cause Solution and reference ":" or other characters that cannot be used in a login user name was entered. • Enter the correct login user name. • Change the user name if it contains a space, ":" or other unusable characters. Too many requests for authentication occurred at one time. Try again later. If the problem persists, check whether the machine is under an authentication attack. The attack status can be checked by the screen message, in the system log, or in the email notification sent to the administrator. A user group cannot be obtained. Check whether the group name registered on the machine is correct and whether the DC settings are configured correctly.*1 Kerberos Authentication has failed. Check whether the realm name registered on the clock at the KDC (key distribution center) and the clock of the device are synchronized.*3 No connection is established to the authentication server. Enter the server IP address in [Settings] [Machine Features Settings] [System Settings] [Interface Settings] tab [Ping Command] to check whether a connection can be established to the server. The domain name is incorrect or cannot be resolved. Check whether the domain name registered on the machine is correct and whether the name can be resolved.*2 The login user name or Check the login user name and/or password password is incorrect. of the user registered on the server. Too many requests for authentication occurred at one time. Try again later. If the problem persists, check whether the machine is under an authentication attack. The attack status can be checked by the screen message, in the system log, or in the email notification sent to the administrator. 288