The LDAP Tool Box project provides some additional Nagios plugins to
monitor LDAP servers. Please note that this package is just containing
the GPL license for the packages containing the real checks:

* monitoring-plugins-berkeleydb_locks
* monitoring-plugins-ldap_dn
* monitoring-plugins-ldap_monitor
* monitoring-plugins-ldap_query
* monitoring-plugins-ldap_slurpd_status.pl
* monitoring-plugins-syncrepl_status
* monitoring-plugins-ldap_time
* monitoring-plugins-lmdb_usage
* monitoring-eventhandlers-restart_slapd

Please install the packages above depending on your needs.