наложение полупрозрачного прокси на slapd (Translucent Proxy overlay to slapd)
Имя (Name)
slapo-translucent - Translucent Proxy overlay to slapd
Синопсис (Synopsis)
ETCDIR/slapd.conf
Описание (Description)
The Translucent Proxy overlay can be used with a backend database
such as slapd-mdb(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.
Конфигурация (Configuration)
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.
Контроль доступа (Access control)
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.
Предостережение (Caveat)
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.
Файлы (Files)
ETCDIR/slapd.conf
default slapd configuration file
Смотри также (See also)
slapd.conf(5), slapd-config(5), slapd-ldap(5).
