Provided by: winbind_4.3.8+dfsg-0ubuntu1_i386 bug


       idmap_ad - Samba's idmap_ad Backend for Winbind


       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.


       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.


       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.

                workgroup = CORP

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

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


       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.