Provided by: slapd_2.4.28-1.1ubuntu4_amd64 bug


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


       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

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

              Access Logging.  This overlay can record accesses to a given  backend  database  on
              another database.

              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

              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.

              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.

              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.

              Password  Policy.   This overlay provides a variety of password control mechanisms,
              e.g. password 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

              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 objectClass/attributeType mapping.

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

              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.

              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.


              default slapd configuration file

              default slapd configuration directory


       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-retcode(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" (


       OpenLDAP   Software   is   developed   and   maintained   by    The    OpenLDAP    Project
       <>.  OpenLDAP Software is derived from University of Michigan LDAP
       3.3 Release.