389-ds-base 188.8.131.52 Enterprise-class LDAP server
389ds is an enterprise-class LDAP server. It is hardened by real-world use, is full-featured, and supports multi-master replication.
Other features include:
Online, zero downtime, LDAP-based update of schema, configuration, and management including Access Control Information (ACIs);
Asynchronous Multi-Master Replication, to provide fault tolerance and high write performance;
Secure authentication and transport (TLS, and SASL);
LDAPv3 compliant server.