pam_winbind - PAM module for Winbind
This tool is part of the samba(7) suite.
pam_winbind is a PAM module that can authenticate users against
the local domain by talking to the Winbind daemon.
Edit the PAM system config /etc/pam.d/service and modify it as the following
auth required pam_env.so
auth sufficient pam_unix2.so
+++ auth required pam_winbind.so use_first_pass
account requisite pam_unix2.so
+++ account required pam_winbind.so use_first_pass
+++ password sufficient pam_winbind.so
password requisite pam_pwcheck.so cracklib
password required pam_unix2.so use_authtok
session required pam_unix2.so
+++ session required pam_winbind.so
Make sure that pam_winbind is one of the first modules in the
session part. It may retrieve kerberos tickets which are needed by other
pam_winbind supports several options which can either be set in the PAM
configuration files or in the pam_winbind configuration file situated at
/etc/security/pam_winbind.conf. Options from the PAM configuration file take
precedence to those from the configuration file. See
pam_winbind.conf(5) for further details.
Gives debugging output to syslog.
Gives detailed PAM state debugging output to
require_membership_of=[SID or NAME]
If this option is set, pam_winbind will only succeed if
the user is a member of the given SID or NAME. A SID can be either a
group-SID, an alias-SID or even an user-SID. It is also possible to give a
NAME instead of the SID. That name must have the form:
. pam_winbind will, in that
case, lookup the SID internally. Note that NAME may not contain any spaces. It
is thus recommended to only use SIDs. You can verify the list of SIDs a user
is a member of with wbinfo --user-sids=SID.
This option must only be specified on a auth module declaration,
as it only operates in conjunction with password authentication.
By default, pam_winbind tries to get the authentication
token from a previous module. If no token is available it asks the user for
the old password. With this option, pam_winbind aborts with an error if no
authentication token from a previous module is available.
Same as the use_first_pass option (previous item), except
that if the primary password is not valid, PAM will prompt for a
Set the new password to the one provided by the
previously stacked password module. If this option is not set pam_winbind will
ask the user for the new password.
Same as the use_authtok option (previous item), except
that if the new password is not valid, PAM will prompt for a password.
pam_winbind can authenticate using Kerberos when winbindd
is talking to an Active Directory domain controller. Kerberos authentication
must be enabled with this parameter. When Kerberos authentication can not
succeed (e.g. due to clock skew), winbindd will fallback to samlogon
authentication over MSRPC. When this parameter is used in conjunction with
winbind refresh tickets, winbind will keep your Ticket Granting Ticket
(TGT) uptodate by refreshing it whenever necessary.
When pam_winbind is configured to try kerberos
authentication by enabling the krb5_auth option, it can store the
retrieved Ticket Granting Ticket (TGT) in a credential cache. The type of
credential cache can be set with this option. Currently the only supported
value is: FILE. In that case a credential cache in the form of
/tmp/krb5cc_UID will be created, where UID is replaced with the numeric user
id. Leave empty to just do kerberos authentication without having a ticket
cache after the logon has succeeded.
Winbind allows one to logon using cached credentials when
winbind offline logon is enabled. To use this feature from the PAM
module this option must be set.
Do not emit any messages.
Create homedirectory for a user on-the-fly, option is
valid in PAM session block.
Defines number of days before pam_winbind starts to warn
about passwords that are going to expire. Defaults to 14 days.
PAM DATA EXPORTS¶
This section describes the data exported in the PAM stack which could be used in
other PAM modules.
This is the Windows Home Directory set in the profile tab
in the user settings on the Active Directory Server. This could be a local
path or a directory on a share mapped to a drive.
The path to the logon script which should be executed if
a user logs in. This is normally a relative path to the script stored on the
This exports the Active Directory server we are
authenticating against. This can be used as a variable later.
This is the profile path set in the profile tab in the
user settings. Normally the home directory is synced with this directory on a
This man page is part of version 4.9.5-Debian of Samba.
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.
This manpage was written by Jelmer Vernooij and Guenther