389 Directory Server
The 389 Directory Server (previously Fedora Directory Server) is a Lightweight Directory Access Protocol (LDAP) server developed by Red Hat as part of the community-supported Fedora Project. The name "389" derives from the port number used by LDAP. 389 Directory Server supports many operating systems, including Fedora Linux, Red Hat Enterprise Linux, Debian, Solaris, and HP-UX 11i.