SLAPD.OVERLAYS(5) File Formats Manual SLAPD.OVERLAYS(5)
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 globally.
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 client.
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 auto-
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 duplica-
tion 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.
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 func-
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 <http://www.openldap.org/>. OpenLDAP Software is derived from Uni-
versity of Michigan LDAP 3.3 Release.
OpenLDAP 2012/04/23 SLAPD.OVERLAYS(5)