openldap-client: openldap-client (OpenLDAP client programs with NTLM support) openldap-client: openldap-client: OpenLDAP is an open source implementation of the Lightweight openldap-client: Directory Access Protocol. LDAP is a alternative to the X.500 openldap-client: Directory Access Protocol (DAP).It uses the TCP/IP stack versus openldap-client: the overly complex OSI stack. openldap-client: openldap-client: openldap-client: openldap-client: openldap-client: