Client is unknown
This error indicates that the KDC being used to authenticate the user does not recognize the User Principal Name
specified in the error message.
MAKE SURE THAT THE DOMAIN CONTROLLER INFORMATION IS CORRECT
1 From the Embedded Web Server, click Settings > Device Solutions > Solutions (eSF) > PKI Authentication >
Configure.
2 For Simple Kerberos Setup, make sure that the IP address or host name of the domain controller is correct.
3 If you are using a Kerberos configuration file, then make sure that the domain controller entry is correct.
Login does not respond at “Getting User Info”
For information on LDAP‑related issues, see“LDAP troubleshooting” on page 62.
User is logged out automatically
I
NCREASE THE PANEL LOGIN TIMEOUT INTERVAL
1 From the Embedded Web Server, click Settings > Security > Miscellaneous Security Settings > Login Restrictions.
2 Increase the time (in seconds) of the Panel Login Timeout setting.
3 Apply the changes.
LDAP troubleshooting
LDAP lookups take a long time and then fail
This issue can occur during login (at “Getting User Info”) or during address book searches. Try one or more of the
following:
MAKE SURE THAT PORT 389 (NON‑SSL) AND PORT 636 (SSL) ARE NOT BLOCKED BY A FIREWALL
The printer uses these ports to communicate with the LDAP server. The ports must be open for LDAP lookups to
work.
MAKE SURE THAT THE LDAP SEARCH BASE IS NOT TOO BROAD IN SCOPE
Narrow the LDAP search base to the lowest possible scope that will include all necessary users.
Troubleshooting 62
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