1IDMAP_RFC2307(8) System Administration tools IDMAP_RFC2307(8)
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6 idmap_rfc2307 - Samba's idmap_rfc2307 Backend for Winbind
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9 The idmap_rfc2307 plugin provides a way for winbind to read id mappings
10 from records in an LDAP server as defined in RFC 2307. The LDAP server
11 can be stand-alone or the LDAP server provided by the AD server. An AD
12 server is always required to provide the mapping between name and SID,
13 and the LDAP server is queried for the mapping between name and
14 uid/gid. This module implements only the "idmap" API, and is READONLY.
15 Mappings must be provided in advance by the administrator by creating
17 the user accounts in the Active Directory server and the posixAccount
18 and posixGroup objects in the LDAP server. The names in the Active
19 Directory server and in the LDAP server have to be the same.
20 This id mapping approach allows the reuse of existing LDAP
22 authentication servers that store records in the RFC 2307 format.
23 When connecting to the LDAP server provided by an AD server, the
25 parameter ldap ssl ads determines whether SSL should be used. When
26 using a stand-alone LDAP server, ldap ssl applies.
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29 range = low - high
30 Defines the available matching UID and GID range for which the
31 backend is authoritative. Note that the range acts as a filter. If
32 specified any UID or GID stored in AD that fall outside the range
33 is ignored and the corresponding map is discarded. It is intended
34 as a way to avoid accidental UID/GID overlaps between local and
35 remotely defined IDs.
36 ldap_server = <ad | stand-alone >
38 Defines the type of LDAP server to use. This can either be the LDAP
39 server provided by the Active Directory server (ad) or a
40 stand-alone LDAP server.
41 bind_path_user
43 Specifies the search base where user objects can be found in the
44 LDAP server.
45 bind_path_group
47 Specifies the search base where group objects can be found in the
48 LDAP server.
49 user_cn = <yes | no>
51 Query cn attribute instead of uid attribute for the user name in
52 LDAP. This option is not required, the default is no.
53 realm
55 Append @realm to cn for groups (and users if user_cn is set) in
56 LDAP queries. This option is not required, the default is not to
57 append the realm.
58 ldap_domain
60 When using the LDAP server in the Active Directory server, this
61 allows one to specify the domain where to access the Active
62 Directory server. This allows using trust relationships while
63 keeping all RFC 2307 records in one place. This parameter is
64 optional, the default is to access the AD server in the current
65 domain to query LDAP records.
66 ldap_url
68 When using a stand-alone LDAP server, this parameter specifies the
69 ldap URL for accessing the LDAP server.
70 ldap_user_dn
72 Defines the user DN to be used for authentication. The secret for
73 authenticating this user should be stored with net idmap secret
74 (see net(8)). If absent, an anonymous bind will be performed.
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77 The following example shows how to retrieve id mappings from a
78 stand-alone LDAP server. This example also shows how to leave a small
79 non conflicting range for local id allocation that may be used in
80 internal backends like BUILTIN.
81 [global]
83 idmap config * : backend = tdb
84 idmap config * : range = 1000000-1999999
85 idmap config DOMAIN : backend = rfc2307
87 idmap config DOMAIN : range = 2000000-2999999
88 idmap config DOMAIN : ldap_server = stand-alone
89 idmap config DOMAIN : ldap_url = ldap://ldap1.example.com
90 idmap config DOMAIN : ldap_user_dn = cn=ldapmanager,dc=example,dc=com
91 idmap config DOMAIN : bind_path_user = ou=People,dc=example,dc=com
92 idmap config DOMAIN : bind_path_group = ou=Group,dc=example,dc=com
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96 The original Samba software and related utilities were created by
97 Andrew Tridgell. Samba is now developed by the Samba Team as an Open
98 Source project similar to the way the Linux kernel is developed.
99Samba 4.18.9 11/30/2023 IDMAP_RFC2307(8)