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_ldap.8">
6 <refentrytitle>idmap_ldap</refentrytitle>
7 <manvolnum>8</manvolnum>
8 <refmiscinfo class="source">Samba</refmiscinfo>
9 <refmiscinfo class="manual">System Administration tools</refmiscinfo>
10 <refmiscinfo class="version">3.3</refmiscinfo>
15 <refname>idmap_ldap</refname>
16 <refpurpose>Samba's idmap_ldap Backend for Winbind</refpurpose>
20 <title>DESCRIPTION</title>
22 <para>The idmap_ldap plugin provides a means for Winbind to
23 store and retrieve SID/uid/gid mapping tables in an LDAP directory
28 In contrast to read only backends like idmap_rid, it is an allocating
29 backend: This means that it needs to allocate new user and group IDs in
30 order to create new mappings. The allocator can be provided by the
31 idmap_ldap backend itself or by any other allocating backend like
32 idmap_tdb or idmap_tdb2. This is configured with the
33 parameter <parameter>idmap alloc backend</parameter>.
37 Note that in order for this (or any other allocating) backend to
38 function at all, the default backend needs to be writeable.
39 The ranges used for uid and gid allocation are the default ranges
40 configured by "idmap uid" and "idmap gid".
44 Furthermore, since there is only one global allocating backend
45 responsible for all domains using writeable idmap backends,
46 any explicitly configured domain with idmap backend ldap
47 should have the same range as the default range, since it needs
48 to use the global uid / gid allocator. See the example below.
53 <title>IDMAP OPTIONS</title>
57 <term>ldap_base_dn = DN</term>
59 Defines the directory base suffix to use when searching for
60 SID/uid/gid mapping entries. If not defined, idmap_ldap will default
61 to using the "ldap idmap suffix" option from smb.conf.
66 <term>ldap_user_dn = DN</term>
68 Defines the user DN to be used for authentication. If absent an
69 anonymous bind will be performed.
74 <term>ldap_url = ldap://server/</term>
76 Specifies the LDAP server to use when searching for existing
77 SID/uid/gid map entries. If not defined, idmap_ldap will
78 assume that ldap://localhost/ should be used.
83 <term>range = low - high</term>
85 Defines the available matching uid and gid range for which the
86 backend is authoritative.
87 If the parameter is absent, Winbind fails over to use the
88 "idmap uid" and "idmap gid" options
96 <title>IDMAP ALLOC OPTIONS</title>
100 <term>ldap_base_dn = DN</term>
102 Defines the directory base suffix under which new SID/uid/gid mapping
103 entries should be stored. If not defined, idmap_ldap will default
104 to using the "ldap idmap suffix" option from smb.conf.
109 <term>ldap_user_dn = DN</term>
111 Defines the user DN to be used for authentication. If absent an
112 anonymous bind will be performed.
117 <term>ldap_url = ldap://server/</term>
119 Specifies the LDAP server to which modify/add/delete requests should
120 be sent. If not defined, idmap_ldap will assume that ldap://localhost/
128 <title>EXAMPLES</title>
131 The follow sets of a LDAP configuration which uses two LDAP
132 directories, one for storing the ID mappings and one for retrieving
138 idmap backend = ldap:ldap://localhost/
139 idmap uid = 1000000-1999999
140 idmap gid = 1000000-1999999
142 idmap alloc backend = ldap
143 idmap alloc config : ldap_url = ldap://id-master/
144 idmap alloc config : ldap_base_dn = ou=idmap,dc=example,dc=com
151 <para>In order to use authentication against ldap servers you may
152 need to provide a DN and a password. To avoid exposing the password
153 in plain text in the configuration file we store it into a security
154 store. The "net idmap " command is used to store a secret
155 for the DN specified in a specific idmap domain.
160 <title>AUTHOR</title>
163 The original Samba software and related utilities
164 were created by Andrew Tridgell. Samba is now developed
165 by the Samba Team as an Open Source project similar
166 to the way the Linux kernel is developed.