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Developer(s) OpenLDAP Foundation
Initial release August 26, 1998; 24 years ago (1998-08-26)[1][2]
Stable release

2.6.4  (February 8, 2023; 3 months ago (2023-02-08))

Preview release none [±]
Written in C
Operating system Cross-platform
Available in Multilingual
Type Network management software
User management software
License(s) OpenLDAP Public License[3]

OpenLDAP is an open-source implementation of the platform-independent Lightweight Directory Access Protocol (LDAP) developed by the OpenLDAP Project and is released under its own BSD-style license called the OpenLDAP Public License.[3] Several common Linux distributions include OpenLDAP Software for LDAP support. The software also runs on BSD-variants, as well as AIX, Android, HP-UX, Mac OS X, Solaris, Microsoft Windows, and z/OS.

Product history

The OpenLDAP Project was started on August 25, 1998 by Kurt Zeilenga, followed up with a release of version 1.0 the next day.[2][1] The project started by cloning the LDAP reference source from the University Of Michigan, where a long-running project had supported development and evolution of the LDAP protocol. The program moved up to version 2.0 a couple of years later.[4]

As of May 2012, the OpenLDAP Project has three core team members: Howard Chu (Chief Architect), Pierangelo Masarati, and Kurt Zeilenga.[5]. There are numerous other important and active contributors including Luke Howard, Hallvard Furuseth, Quanah Gibson-Mount, and Gavin Henry.

Additionally, the OpenLDAP Project is home to a number of sub-projects:

  • Fortress - Role-based identity access management Java SDK
  • JLDAP - LDAP Class Libraries for Java
  • JDBC-LDAP - Java JDBC - LDAP Bridge Driver


Some of the primary features of OpenLDAP include[6]:

  • LDAPv3 support
  • IPv6 support
  • LDAP over IPC
  • updated C API
  • LDIFv1 support
  • enhanced stand-alone LDAP server

Hardware/software requirements

OpenLDAP installation requirements vary based on the features desired. Those prerequisites can be found on OpenLDAP's FAQ-O-Matic.

Videos, screenshots, and other media

A few OpenLDAP instructional videos can be found on YouTube.

Entities using OpenLDAP

Further reading

External links


  1. 1.0 1.1 "". National Technical University of Athens. Retrieved 15 March 2012. 
  2. 2.0 2.1 Zeilenga, Kurt (27 August 2007). "Development of OpenLDAP - Re: Reminder: 10 Year Anniversary next year". Retrieved 15 March 2012. 
  3. 3.0 3.1 "OpenLDAP Public License for 2.4.30". OpenLDAP Foundation. Retrieved 15 March 2012. 
  4. "OpenLDAP Release Road Map". OpenLDAP Foundation. Retrieved 15 March 2012. 
  5. "The OpenLDAP Project Overview". OpenLDAP Foundation. Retrieved 15 March 2012. 
  6. "25.1.1. OpenLDAP Features". Red Hat Enterprise Linux Deployment Guide. Red Hat, Inc. 2007. Retrieved 15 March 2012.