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SLAPD.OVERLAYS(5)                                                                          SLAPD.OVERLAYS(5)



NAME
       slapd.overlays - overlays for slapd, the stand-alone LDAP daemon

DESCRIPTION
       The slapd(8) daemon can use a variety of different overlays to alter or extend the normal behavior of
       a database backend.  Overlays may be compiled statically  into  slapd,  or  when  module  support  is
       enabled,  they  may  be dynamically loaded. Most of the overlays are only allowed to be configured on
       individual databases, but some may also be configured globally.

       Configuration options for each overlay are documented separately in  the  corresponding  slapo-<over-
       lay>(5) manual pages.

       accesslog
              Access Logging.  This overlay can record accesses to a given backend database on another data-base. database.
              base.

       auditlog
              Audit Logging.  This overlay records changes on a given backend database to an LDIF log  file.
              By default it is not built.

       chain  Chaining.   This  overlay  allows  automatic  referral chasing when a referral would have been
              returned, either when configured by the server or when requested by the client.

       constraint
              Constraint.  This overlay enforces a regular expression constraint on all values of  specified
              attributes.  It is used to enforce a more rigorous syntax when the underlying attribute syntax
              is too general.

       dds    Dynamic Directory Services.  This overlay supports dynamic objects, which have a limited  life
              after which they expire and are automatically deleted.

       dyngroup
              Dynamic  Group.   This is a demo overlay which extends the Compare operation to detect members
              of a dynamic group.  It has no effect on any other operations.

       dynlist
              Dynamic List.  This overlay allows expansion of dynamic groups and more.

       pcache Proxycache.  This overlay allows caching of LDAP search requests in a local database.   It  is
              most often used with the slapd-ldap(5) or slapd-meta(5) backends.

       ppolicy
              Password  Policy.   This overlay provides a variety of password control mechanisms, e.g. pass-word password
              word aging, password reuse and duplication control, mandatory password resets, etc.

       refint Referential Integrity.  This overlay can be used with a backend database such as  slapd-bdb(5)
              to maintain the cohesiveness of a schema which utilizes reference attributes.

       retcode
              Return  Code.   This  overlay  is useful to test the behavior of clients when server-generated
              erroneous and/or unusual responses occur.

       rwm    Rewrite/remap.  This overlay is experimental.  It performs basic DN/data rewrite  and  object-Class/attributeType objectClass/attributeType
              Class/attributeType mapping.

       syncprov
              Syncrepl  Provider.   This  overlay implements the provider-side support for syncrepl replica-tion, replication,
              tion, including persistent search functionality.

       translucent
              Translucent Proxy.  This overlay can be used with a backend database such as  slapd-bdb(5)  to
              create  a  "translucent proxy".  Content of entries retrieved from a remote LDAP server can be
              partially overridden by the database.

       unique Attribute Uniqueness.  This overlay can be used with a backend database such  as  slapd-bdb(5)
              to enforce the uniqueness of some or all attributes within a subtree.

       valsort
              Value  Sorting.   This  overlay  can  be used to enforce a specific order for the values of an
              attribute when it is returned in a search.

FILES
       /etc/openldap/slapd.conf
              default slapd configuration file

       /etc/openldap/slapd.d
              default slapd configuration directory

SEE ALSO
       ldap(3), slapo-accesslog(5), slapo-auditlog(5),  slapo-chain(5),  slapo-constraint(5),  slapo-dds(5),
       slapo-dyngroup(5),  slapo-dynlist(5),  slapo-pcache(5), slapo-ppolicy(5), slapo-refint(5), slapo-ret-code(5), slapo-retcode(5),
       code(5), slapo-rwm(5), slapo-syncprov(5), slapo-translucent(5),  slapo-unique(5).   slapo-valsort(5).
       slapd-config(5),   slapd.conf(5),  slapd.backends(5),  slapd(8).   "OpenLDAP  Administrator's  Guide"
       (http://www.OpenLDAP.org/doc/admin/)

ACKNOWLEDGEMENTS
       OpenLDAP Software is developed and maintained by  The  OpenLDAP  Project  <http://www.openldap.org/>.
       OpenLDAP Software is derived from University of Michigan LDAP 3.3 Release.



OpenLDAP 2.4.11                                  2008/07/16                                SLAPD.OVERLAYS(5)