серверная часть LDAP для slapd (LDAP backend to slapd)
OVERLAYS
The LDAP backend provides basic proxying functionalities to many
overlays. The chain overlay, described in slapo-chain(5), and
the translucent overlay, described in slapo-translucent(5),
deserve a special mention.
Conversely, there are many overlays that are best used in
conjunction with the LDAP backend. The proxycache overlay allows
caching of LDAP search requests (queries) in a local database.
See slapo-pcache(5) for details. The rwm overlay provides DN
rewrite and attribute/objectClass mapping capabilities to the
underlying database. See slapo-rwm(5) for details.