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.