The SLAPD (Standalone LDAP Daemon) and SLURPD (Stand-alone LDAP update replication daemon) are directory services used over Internet Protocol (IP) networks. These protocols originally evolved within the long-running project that developed the LDAP protocol.[1][2] It was developed at the University of Michigan, and was the first Lightweight Directory Access Protocol (LDAP) software.[3]
Today, many LDAP Server Implementations are derived from the same code base of the original SLAPD and/or evolutions of it.
In 1996, Netscape Communications Corporation hired several of the project's developers, who then worked on what became known as the Netscape Directory Server.[3]