An LDAP-based server that centralizes application settings, user profiles, group data, platform independent, system. Forming the central repository for an Identity Management infrastructure, as a directory server simplifies user management, eliminating data redundancy and automating data maintenance. It also improves security, by storing policies and access control information, Red Hat/389 Directory Server creates a single authentication source across entire enterprise for both intranet and extra net applications.
http://directory.fedoraproject.org/