Network administrators frequently use the Lightweight Directory Access Protocol (LDAP) to implement a centralized directory server. You can use LDAP to authenticate users in Apache. Two popular open source LDAP solutions are OpenLDAP and Red Hat Directory Server. According to the Apache documentation, Novell LDAP and iPlanet Directory Server are also supported. This article focuses on OpenLDAP, but the concepts and examples should be applicable to the others.
Red Hat Directory Server (RHDS) wins “Best Identity Management Solution” at “SIIA’s 2008 Codie” awards. RHDS is based upon the Fedora Directory Server (FDS), which is an LDAP (Lightweight Directory Access Protocol) server developed by Red Hat, as part of Red Hat’s community-supported Fedora Project. Fedora Directory Server is identical to the Red Hat Directory Server (rebranded version).