1 <?xml version="1.0" encoding="iso-8859-1"?>
2 <!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
3 <refentry id="idmap_ad.8">
6 <refentrytitle>idmap_ad</refentrytitle>
7 <manvolnum>8</manvolnum>
8 <refmiscinfo class="source">Samba</refmiscinfo>
9 <refmiscinfo class="manual">System Administration tools</refmiscinfo>
10 <refmiscinfo class="version">3.6</refmiscinfo>
15 <refname>idmap_ad</refname>
16 <refpurpose>Samba's idmap_ad Backend for Winbind</refpurpose>
20 <title>DESCRIPTION</title>
21 <para>The idmap_ad plugin provides a way for Winbind to read
22 id mappings from an AD server that uses RFC2307/SFU schema
23 extensions. This module implements only the "idmap"
24 API, and is READONLY. Mappings must be provided in advance
25 by the administrator by adding the posixAccount/posixGroup
26 classes and relative attribute/value pairs to the user and
27 group objects in the AD.</para>
30 Note that the idmap_ad module has changed considerably since
31 Samba versions 3.0 and 3.2.
32 Currently, the <parameter>ad</parameter> backend
33 does not work as the the default idmap backend, but one has
34 to configure it separately for each domain for which one wants
35 to use it, using disjoint ranges. One usually needs to configure
36 a writeable default idmap range, using for example the
37 <parameter>tdb</parameter> or <parameter>ldap</parameter>
38 backend, in order to be able to map the BUILTIN sids and
39 possibly other trusted domains. The writeable default config
40 is also needed in order to be able to create group mappings.
41 This catch-all default idmap configuration should have a range
42 that is disjoint from any explicitly configured domain with
43 idmap backend <parameter>ad</parameter>. See the example below.
48 <title>IDMAP OPTIONS</title>
52 <term>range = low - high</term>
54 Defines the available matching UID and GID range for which the
55 backend is authoritative. Note that the range acts as a filter.
56 If specified any UID or GID stored in AD that fall outside the
57 range is ignored and the corresponding map is discarded.
58 It is intended as a way to avoid accidental UID/GID overlaps
59 between local and remotely defined IDs.
63 <term>schema_mode = <rfc2307 | sfu | sfu20></term>
65 Defines the schema that idmap_ad should use when querying
66 Active Directory regarding user and group information.
67 This can be either the RFC2307 schema support included
68 in Windows 2003 R2 or the Service for Unix (SFU) schema.
69 For SFU 3.0 or 3.5 please choose "sfu", for SFU 2.0
70 please choose "sfu20".
72 Please note that primary group membership is currently always calculated
73 via the "primaryGroupID" LDAP attribute.
80 <title>EXAMPLES</title>
82 The following example shows how to retrieve idmappings from our principal and
83 trusted AD domains. If trusted domains are present id conflicts must be
84 resolved beforehand, there is no
85 guarantee on the order conflicting mappings would be resolved at this point.
87 This example also shows how to leave a small non conflicting range for local
88 id allocation that may be used in internal backends like BUILTIN.
95 idmap config * : backend = tdb
96 idmap config * : range = 1000000-1999999
98 idmap config CORP : backend = ad
99 idmap config CORP : range = 1000-999999
104 <title>AUTHOR</title>
107 The original Samba software and related utilities
108 were created by Andrew Tridgell. Samba is now developed
109 by the Samba Team as an Open Source project similar
110 to the way the Linux kernel is developed.