Overview

To resolve the problem, try one or more of the following: If the problem persists, contact Support for additional assistance. Ensure that the server and firewall settings are configured to allow communication between the printer and the LDAP server on port 389 and port 636. The default ports are port 389 and port 636 If reverse DNS lookup is not used in your network, then disable Reverse IP Lookups in the Kerberos settings. To disable Reverse IP Lookups: From the Embedded Web Server, click Settings > Security . In the Network Accounts section, click Kerberos . In the Miscellaneous Settings section, select Disable Reverse IP Lookups . Click Save and Verify . From the Embedded Web Server, click Settings > Security . In the Network Accounts section, click Kerberos . In the Miscellaneous Settings section, select Disable Reverse IP Lookups . Click Save and Verify . If the LDAP server requires SSL, then enable SSL for LDAP lookups Some solutions that provide authentication require you to enable SSL for LDAP lookups. Narrow the LDAP search base to the lowest possible scope that includes all necessary users. Ensure that all LDAP attributes that are being searched for are correct.