1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
<refentry id="pam_winbind.8">
<refmeta>
<refentrytitle>pam_winbind</refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo class="source">Samba</refmiscinfo>
<refmiscinfo class="manual">8</refmiscinfo>
<refmiscinfo class="version">3.6</refmiscinfo>
</refmeta>
<refnamediv>
<refname>pam_winbind</refname>
<refpurpose>PAM module for Winbind</refpurpose>
</refnamediv>
<refsect1>
<title>DESCRIPTION</title>
<para>This tool is part of the <citerefentry><refentrytitle>samba</refentrytitle>
<manvolnum>7</manvolnum></citerefentry> suite.</para>
<para>
pam_winbind is a PAM module that can authenticate users against the local domain by talking to the Winbind daemon.
</para>
</refsect1>
<refsect1>
<title>SYNOPSIS</title>
<para>
Edit the PAM system config /etc/pam.d/service and modify it as the following example shows:
<programlisting>
...
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
...
</programlisting>
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 modules.
</para>
</refsect1>
<refsect1>
<title>OPTIONS</title>
<para>
pam_winbind supports several options which can either be set in
the PAM configuration files or in the pam_winbind configuration
file situated at
<filename>/etc/security/pam_winbind.conf</filename>. Options
from the PAM configuration file take precedence to those from
the configuration file. See
<citerefentry><refentrytitle>pam_winbind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for further details.
<variablelist>
<varlistentry>
<term>debug</term>
<listitem><para>Gives debugging output to syslog.</para></listitem>
</varlistentry>
<varlistentry>
<term>debug_state</term>
<listitem><para>Gives detailed PAM state debugging output to syslog.</para></listitem>
</varlistentry>
<varlistentry>
<term>require_membership_of=[SID or NAME]</term>
<listitem><para>
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: <parameter>MYDOMAIN\\mygroup</parameter> or
<parameter>MYDOMAIN\\myuser</parameter>. 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 <command>wbinfo --user-sids=SID</command>.
</para></listitem>
</varlistentry>
<varlistentry>
<term>use_first_pass</term>
<listitem><para>
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.
</para></listitem>
</varlistentry>
<varlistentry>
<term>try_first_pass</term>
<listitem><para>
Same as the use_first_pass option (previous item), except that if the primary password is not
valid, PAM will prompt for a password.
</para></listitem>
</varlistentry>
<varlistentry>
<term>use_authtok</term>
<listitem><para>
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.
</para></listitem>
</varlistentry>
<varlistentry>
<term>krb5_auth</term>
<listitem><para>
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
<parameter>winbind refresh tickets</parameter>, winbind will
keep your Ticket Granting Ticket (TGT) uptodate by refreshing
it whenever necessary.
</para></listitem>
</varlistentry>
<varlistentry>
<term>krb5_ccache_type=[type]</term>
<listitem><para>
When pam_winbind is configured to try kerberos authentication
by enabling the <parameter>krb5_auth</parameter> 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:
<parameter>FILE</parameter>. 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.
</para></listitem>
</varlistentry>
<varlistentry>
<term>cached_login</term>
<listitem><para>
Winbind allows 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.
</para></listitem>
</varlistentry>
<varlistentry>
<term>silent</term>
<listitem><para>
Do not emit any messages.
</para></listitem>
</varlistentry>
<varlistentry>
<term>mkhomedir</term>
<listitem><para>
Create homedirectory for a user on-the-fly, option is valid in
PAM session block.
</para></listitem>
</varlistentry>
<varlistentry>
<term>warn_pwd_expire</term>
<listitem><para>
Defines number of days before pam_winbind starts to warn about passwords that are
going to expire. Defaults to 14 days.
</para></listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1>
<title>PAM DATA EXPORTS</title>
<para>This section describes the data exported in the PAM stack which could be used in other PAM modules.</para>
<varlistentry>
<term>PAM_WINBIND_HOMEDIR</term>
<listitem>
<para>
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.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PAM_WINBIND_LOGONSCRIPT</term>
<listitem>
<para>
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 server.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PAM_WINBIND_LOGONSERVER</term>
<listitem>
<para>
This exports the Active Directory server we are authenticating against. This can be
used as a variable later.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PAM_WINBIND_PROFILEPATH</term>
<listitem>
<para>
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 share.
</para>
</listitem>
</varlistentry>
</refsect1>
<refsect1>
<title>SEE ALSO</title>
<para><citerefentry>
<refentrytitle>pam_winbind.conf</refentrytitle>
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
<refentrytitle>wbinfo</refentrytitle>
<manvolnum>1</manvolnum></citerefentry>, <citerefentry>
<refentrytitle>winbindd</refentrytitle>
<manvolnum>8</manvolnum></citerefentry>, <citerefentry>
<refentrytitle>smb.conf</refentrytitle>
<manvolnum>5</manvolnum></citerefentry></para>
</refsect1>
<refsect1>
<title>VERSION</title>
<para>This man page is correct for version 3 of Samba.</para>
</refsect1>
<refsect1>
<title>AUTHOR</title>
<para>
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.
</para>
<para>This manpage was written by Jelmer Vernooij and Guenther Deschner.</para>
</refsect1>
</refentry>
|
