idmap_ldap(8)

NAME

       idmap_ldap - Samba's idmap_ldap Backend for Winbind

DESCRIPTION

       The idmap_ldap plugin provides a means for Winbind to store and
       retrieve SID/uid/gid mapping tables in an LDAP directory service. The
       module implements both the "idmap" and "idmap alloc" APIs.

IDMAP OPTIONS

       ldap_base_dn = DN
           Defines the directory base suffix to use when searching for
           SID/uid/gid mapping entries. If not defined, idmap_ldap will
           default to using the "ldap idmap suffix" option from smb.conf.

       ldap_user_dn = DN
           Defines the user DN to be used for authentication. If absent an
           anonymous bind will be performed.

       ldap_url = ldap://server/
           Specifies the LDAP server to use when searching for existing
           SID/uid/gid map entries. If not defined, idmap_ldap will assume
           that ldap://localhost/ should be used.

       range = low - high
           Defines the available matching uid and gid range for which the
           backend is authoritative. Note that the range commonly matches the
           allocation range due to the fact that the same backend will store
           and retrieve SID/uid/gid mapping entries. If the parameter is
           absent, Winbind fail over to use the "idmap uid" and "idmap gid"
           options from smb.conf.

IDMAP ALLOC OPTIONS

       ldap_base_dn = DN
           Defines the directory base suffix under which new SID/uid/gid
           mapping entries should be stored. If not defined, idmap_ldap will
           default to using the "ldap idmap suffix" option from smb.conf.

       ldap_user_dn = DN
           Defines the user DN to be used for authentication. If absent an
           anonymous bind will be performed.

       ldap_url = ldap://server/
           Specifies the LDAP server to which modify/add/delete requests
           should be sent. If not defined, idmap_ldap will assume that
           ldap://localhost/ should be used.

       range = low - high
           Defines the available matching uid and gid range from which
           winbindd can allocate for users and groups. If the parameter is
           absent, Winbind fail over to use the "idmap uid" and "idmap gid"
           options from smb.conf.

EXAMPLES

       The follow sets of a LDAP configuration which uses a slave server
       running on localhost for fast fetching SID/gid/uid mappings, it implies
       correct configuration of referrals. The idmap alloc backend is pointed
       directly to the master to skip the referral (and consequent
       reconnection to the master) that the slave would return as allocation
       requires writing on the master.

                [global]
                    idmap domains = ALLDOMAINS
                    idmap config ALLDOMAINS:default      = yes
                    idmap config ALLDOMAINS:backend      = ldap
                    idmap config ALLDOMAINS:ldap_base_dn = ou=idmap,dc=example,dc=com
                    idmap config ALLDOMAINS:ldap_url     = ldap://localhost/
                    idmap config ALLDOMAINS:range        = 10000 - 50000

                    idmap alloc backend = ldap
                    idmap alloc config:ldap_base_dn = ou=idmap,dc=example,dc=com
                    idmap alloc config:ldap_url     = ldap://master.example.com/
                    idmap alloc config:range        = 10000 - 50000

NOTE

       In order to use authentication against ldap servers you may need to
       provide a DN and a password. To avoid exposing the password in plain
       text in the configuration file we store it into a security store. The
       "smbnet idmap " command is used to store a secret for the DN specified
       in a specific idmap domain.

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 3.0                         05/28/2008                     IDMAP_LDAP(8)