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="pam_winbind.conf.5">
6 <refentrytitle>pam_winbind.conf</refentrytitle>
7 <manvolnum>5</manvolnum>
8 <refmiscinfo class="source">Samba</refmiscinfo>
9 <refmiscinfo class="manual">5</refmiscinfo>
10 <refmiscinfo class="version">&doc.version;</refmiscinfo>
15 <refname>pam_winbind.conf</refname>
16 <refpurpose>Configuration file of PAM module for Winbind</refpurpose>
20 <title>DESCRIPTION</title>
22 <para>This configuration file is part of the <citerefentry><refentrytitle>samba</refentrytitle>
23 <manvolnum>7</manvolnum></citerefentry> suite.</para>
26 pam_winbind.conf is the configuration file for the pam_winbind PAM
28 <citerefentry><refentrytitle>pam_winbind</refentrytitle><manvolnum>8</manvolnum></citerefentry>
34 <title>SYNOPSIS</title>
37 The pam_winbind.conf configuration file is a classic ini-style
38 configuration file. There is only one section (global) where
39 various options are defined.
44 <title>OPTIONS</title>
47 pam_winbind supports several options which can either be set in
48 the PAM configuration files or in the pam_winbind configuration
50 <filename>/etc/security/pam_winbind.conf</filename>. Options
51 from the PAM configuration file take precedence to those from
52 the pam_winbind.conf configuration file.
57 <term>debug = yes|no</term>
58 <listitem><para>Gives debugging output to syslog. Defaults to "no".</para></listitem>
62 <term>debug_state = yes|no</term>
63 <listitem><para>Gives detailed PAM state debugging output to syslog. Defaults to "no".</para></listitem>
67 <term>require_membership_of = [SID or NAME]</term>
69 If this option is set, pam_winbind will only succeed if the user is a member of the given SID or NAME. A SID
70 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
71 SID. That name must have the form: <parameter>MYDOMAIN\mygroup</parameter> or
72 <parameter>MYDOMAIN\myuser</parameter> (where '\' character corresponds to the value of
73 <parameter>winbind separator</parameter> parameter). It is also possible to use a UPN in the form
74 <parameter>user@REALM</parameter> or <parameter>group@REALM</parameter>. pam_winbind will, in that case, lookup
75 the SID internally. Note that NAME may not contain any spaces. It is thus recommended to only use SIDs. You can
76 verify the list of SIDs a user is a member of with <command>wbinfo --user-sids=SID</command>.
77 This setting is empty by default.
79 <para>This option only operates during password authentication, and will not restrict access if a password is not required for any reason (such as SSH key-based login).</para>
84 <term>try_first_pass = yes|no</term>
86 By default, pam_winbind tries to get the authentication token from a previous module. If no token is available
87 it asks the user for the old password. With this option, pam_winbind aborts with an error if no authentication
88 token from a previous module is available. If a primary password is not valid, PAM will prompt for a password.
94 <term>krb5_auth = yes|no</term>
97 pam_winbind can authenticate using Kerberos when winbindd is
98 talking to an Active Directory domain controller. Kerberos
99 authentication must be enabled with this parameter. When
100 Kerberos authentication can not succeed (e.g. due to clock
101 skew), winbindd will fallback to samlogon authentication over
102 MSRPC. When this parameter is used in conjunction with
103 <parameter>winbind refresh tickets</parameter>, winbind will
104 keep your Ticket Granting Ticket (TGT) up-to-date by refreshing
105 it whenever necessary. Defaults to "no".
111 <term>krb5_ccache_type = [type]</term>
114 When pam_winbind is configured to try kerberos authentication
115 by enabling the <parameter>krb5_auth</parameter> option, it can
116 store the retrieved Ticket Granting Ticket (TGT) in a
117 credential cache. The type of credential cache can be
118 controlled with this option. The supported values are:
119 <parameter>KCM</parameter> or <parameter>KEYRING</parameter>
120 (when supported by the system's Kerberos library and
122 <parameter>FILE</parameter> and <parameter>DIR</parameter>
123 (when the DIR type is supported by the system's Kerberos
124 library). In case of FILE a credential cache in the form of
125 /tmp/krb5cc_UID will be created - in case of DIR you NEED
126 to specify a directory. UID is replaced with the numeric
127 user id. The UID directory is being created. The path up to
128 the directory should already exist. Check the details of the
129 Kerberos implementation.</para>
131 <para>When using the KEYRING type, the supported mechanism is
132 <quote>KEYRING:persistent:UID</quote>, which uses the Linux
133 kernel keyring to store credentials on a per-UID basis.
134 The KEYRING has its limitations. As it is secure kernel memory,
135 for example bulk storage of credentials is not possible.</para>
137 <para>When using the KCM type, the supported mechanism is
138 <quote>KCM:UID</quote>, which uses a Kerberos credential
139 manager to store credentials on a per-UID basis similar to
140 KEYRING. This is the recommended choice on latest Linux
141 distributions, offering a Kerberos Credential Manager. If not
142 we suggest to use KEYRING as that is the most secure and
143 predictable method.</para>
145 <para>It is also possible to define custom filepaths and use the "%u"
146 pattern in order to substitute the numeric user id.
151 <term>krb5_ccache_type = DIR:/run/user/%u/krb5cc</term>
152 <listitem><para>This will create a credential cache file in the specified directory.</para></listitem>
155 <term>krb5_ccache_type = FILE:/tmp/krb5cc_%u</term>
156 <listitem><para>This will create a credential cache file.</para></listitem>
160 <para> Leave empty to just do kerberos authentication without
161 having a ticket cache after the logon has succeeded.
162 This setting is empty by default.
168 <term>cached_login = yes|no</term>
170 Winbind allows one to logon using cached credentials when <parameter>winbind offline logon</parameter> is enabled. To use this feature from the PAM module this option must be set. Defaults to "no".
175 <term>silent = yes|no</term>
177 Do not emit any messages. Defaults to "no".
182 <term>mkhomedir = yes|no</term>
184 Create homedirectory for a user on-the-fly, option is valid in
185 PAM session block. Defaults to "no".
190 <term>warn_pwd_expire = days</term>
192 Defines number of days before pam_winbind starts to warn about passwords that are
193 going to expire. Defaults to 14 days.
198 <term>pwd_change_prompt = yes|no</term>
200 Generate prompt for changing an expired password. Defaults to "no".
211 <title>SEE ALSO</title>
213 <refentrytitle>pam_winbind</refentrytitle>
214 <manvolnum>8</manvolnum></citerefentry>, <citerefentry>
215 <refentrytitle>wbinfo</refentrytitle>
216 <manvolnum>1</manvolnum></citerefentry>, <citerefentry>
217 <refentrytitle>winbindd</refentrytitle>
218 <manvolnum>8</manvolnum></citerefentry>, <citerefentry>
219 <refentrytitle>smb.conf</refentrytitle>
220 <manvolnum>5</manvolnum></citerefentry></para>
224 <title>VERSION</title>
226 <para>This man page is part of version &doc.version; of Samba.</para>
230 <title>AUTHOR</title>
233 The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by
234 the Samba Team as an Open Source project similar to the way the Linux kernel is developed.
237 <para>This manpage was written by Jelmer Vernooij and Guenther Deschner.</para>