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NAME | SYNOPSIS | DESCRIPTION | CONFIGURATION | ACCESS CONTROL | CAVEATS | FILES | SEE ALSO | COLOPHON |
SLAPO-TRANSLUCENT(5) File Formats Manual SLAPO-TRANSLUCENT(5)
slapo-translucent - Translucent Proxy overlay to slapd
ETCDIR/slapd.conf
The Translucent Proxy overlay can be used with a backend database
such as slapd-bdb(5) to create a "translucent proxy". Entries
retrieved from a remote LDAP server may have some or all attributes
overridden, or new attributes added, by entries in the local database
before being presented to the client.
A search operation is first populated with entries from the remote
LDAP server, the attributes of which are then overridden with any
attributes defined in the local database. Local overrides may be
populated with the add, modify , and modrdn operations, the use of
which is restricted to the root user.
A compare operation will perform a comparison with attributes defined
in the local database record (if any) before any comparison is made
with data in the remote database.
The Translucent Proxy overlay uses a proxied database, typically a
(set of) remote LDAP server(s), which is configured with the options
shown in slapd-ldap(5), slapd-meta(5) or similar. These slapd.conf
options are specific to the Translucent Proxy overlay; they must
appear after the overlay directive that instantiates the translucent
overlay.
translucent_strict
By default, attempts to delete attributes in either the local
or remote databases will be silently ignored. The
translucent_strict directive causes these modifications to
fail with a Constraint Violation.
translucent_no_glue
This configuration option disables the automatic creation of
"glue" records for an add or modrdn operation, such that all
parents of an entry added to the local database must be
created by hand. Glue records are always created for a modify
operation.
translucent_local <attr[,attr...]>
Specify a list of attributes that should be searched for in
the local database when used in a search filter. By default,
search filters are only handled by the remote database. With
this directive, search filters will be split into a local and
remote portion, and local attributes will be searched locally.
translucent_remote <attr[,attr...]>
Specify a list of attributes that should be searched for in
the remote database when used in a search filter. This
directive complements the translucent_local directive.
Attributes may be specified as both local and remote if
desired.
If neither translucent_local nor translucent_remote are specified,
the default behavior is to search the remote database with the
complete search filter. If only translucent_local is specified,
searches will only be run on the local database. Likewise, if only
translucent_remote is specified, searches will only be run on the
remote database. In any case, both the local and remote entries
corresponding to a search result will be merged before being returned
to the client.
translucent_bind_local
Enable looking for locally stored credentials for simple bind
when binding to the remote database fails. Disabled by
default.
translucent_pwmod_local
Enable RFC 3062 Password Modification extended operation on
locally stored credentials. The operation only applies to
entries that exist in the remote database. Disabled by
default.
Access control is delegated to either the remote DSA(s) or to the
local database backend for auth and write operations. It is
delegated to the remote DSA(s) and to the frontend for read
operations. Local access rules involving data returned by the remote
DSA(s) should be designed with care. In fact, entries are returned
by the remote DSA(s) only based on the remote fraction of the data,
based on the identity the operation is performed as. As a
consequence, local rules might only be allowed to see a portion of
the remote data.
The Translucent Proxy overlay will disable schema checking in the
local database, so that an entry consisting of overlay attributes
need not adhere to the complete schema.
Because the translucent overlay does not perform any DN rewrites,
the local and remote database instances must have the same suffix.
Other configurations will probably fail with No Such Object and other
errors.
ETCDIR/slapd.conf
default slapd configuration file
slapd.conf(5), slapd-config(5), slapd-ldap(5).
This page is part of the OpenLDAP (an open source implementation of
the Lightweight Directory Access Protocol) project. Information
about the project can be found at ⟨http://www.openldap.org/⟩. If you
have a bug report for this manual page, see
⟨http://www.openldap.org/its/⟩. This page was obtained from the
project's upstream Git repository
⟨git://git.openldap.org/openldap.git⟩ on 2017-07-05. If you discover
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you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
OpenLDAP LDVERSION RELEASEDATE SLAPO-TRANSLUCENT(5)
Pages that refer to this page: slapd-ldap(5), slapd.overlays(5)