Open-source implementation of the Lightweight Directory Access Protocol (LDAP). Provides a complete LDAP server, client libraries, and utilities for directory services.
- Full LDAPv3 protocol support
- Multi-master replication (syncrepl)
- SSL/TLS encryption (LDAPS, StartTLS)
- Schema validation and extensibility
- Access control lists (ACLs)
- Overlays for extended functionality
- Password policies and authentication
- Cross-platform support
- Enterprise directory services
- Centralized authentication backend
- Address book and contact management
- SSO integration with Kerberos
- Application user store
- C (core implementation)
- OpenSSL/GnuTLS (cryptographic operations)
- Berkeley DB/LMDB (storage backends)
- OLDAP-2.8 (OpenLDAP Public License)
- Widely used open-source LDAP server
- Active community maintenance
- Latest stable: 2.5.x series
- Official Docker images:
osixia/openldap, bitnami/openldap
- Industry standard for open-source LDAP
¶ History and References
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