IDMAP_AD(8)						    System Administration tools 					       IDMAP_AD(8)

NAME

       idmap_ad - Samba's idmap_ad Backend for Winbind

DESCRIPTION

       The idmap_ad plugin provides a way for Winbind to read id mappings from an AD server that uses RFC2307/SFU schema extensions. This module
       implements only the "idmap" API, and is READONLY. Mappings must be provided in advance by the administrator by adding the uidNumber
       attributes for users and gidNumber attributes for groups in the AD. Winbind will only map users that have a uidNumber and whose primary
       group have a gidNumber attribute set. It is however recommended that all groups in use have gidNumber attributes assigned, otherwise they
       are not working.

       Currently, the ad backend does not work as the default idmap backend, but one has to configure it separately for each domain for which one
       wants to use it, using disjoint ranges. One usually needs to configure a writeable default idmap range, using for example the tdb or ldap
       backend, in order to be able to map the BUILTIN sids and possibly other trusted domains. The writeable default config is also needed in
       order to be able to create group mappings. This catch-all default idmap configuration should have a range that is disjoint from any
       explicitly configured domain with idmap backend ad. See the example below.

IDMAP OPTIONS

       range = low - high
	   Defines the available matching UID and GID range for which the backend is authoritative. Note that the range acts as a filter. If
	   specified any UID or GID stored in AD that fall outside the range is ignored and the corresponding map is discarded. It is intended as
	   a way to avoid accidental UID/GID overlaps between local and remotely defined IDs.

       schema_mode = <rfc2307 | sfu | sfu20>
	   Defines the schema that idmap_ad should use when querying Active Directory regarding user and group information. This can be either the
	   RFC2307 schema support included in Windows 2003 R2 or the Service for Unix (SFU) schema. For SFU 3.0 or 3.5 please choose "sfu", for
	   SFU 2.0 please choose "sfu20". Please note that primary group membership is currently always calculated via the "primaryGroupID" LDAP
	   attribute.

EXAMPLES

       The following example shows how to retrieve idmappings from our principal and trusted AD domains. If trusted domains are present id
       conflicts must be resolved beforehand, there is no guarantee on the order conflicting mappings would be resolved at this point. This
       example also shows how to leave a small non conflicting range for local id allocation that may be used in internal backends like BUILTIN.

		[global]
		workgroup = CORP

		idmap config * : backend = tdb
		idmap config * : range = 1000000-1999999

		idmap config CORP : backend  = ad
		idmap config CORP : range = 1000-999999

AUTHOR

       The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by the Samba Team as an Open
       Source project similar to the way the Linux kernel is developed.

Samba 4.0							    06/17/2014							       IDMAP_AD(8)