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-<overlay>(5)
       manual pages.

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

       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.  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 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
              objectClass/attributeType mapping.

       syncprov
              Syncrepl Provider.  This overlay implements the provider-side support  for  syncrepl  replication,
              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/ldap/slapd.conf
              default slapd configuration file

       /etc/ldap/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-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" (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                                           2012/04/23                                  SLAPD.OVERLAYS(5)