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
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
|
<refentry id="smb.conf.5" xmlns:xi="http://www.w3.org/2003/XInclude"
xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
<refmeta>
<refentrytitle>smb.conf</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>smb.conf</refname>
<refpurpose>The configuration file for the Samba suite</refpurpose>
</refnamediv>
<refsect1>
<title>SYNOPSIS</title>
<para>
The <filename moreinfo="none">smb.conf</filename> file is a configuration file for the Samba suite. <filename
moreinfo="none">smb.conf</filename> contains runtime configuration information for the Samba programs. The
<filename moreinfo="none">smb.conf</filename> file is designed to be configured and administered by the
<citerefentry><refentrytitle>swat</refentrytitle> <manvolnum>8</manvolnum></citerefentry> program. The
complete description of the file format and possible parameters held within are here for reference purposes.
</para>
</refsect1>
<refsect1 id="FILEFORMATSECT">
<title>FILE FORMAT</title>
<para>
The file consists of sections and parameters. A section begins with the name of the section in square brackets
and continues until the next section begins. Sections contain parameters of the form:
<programlisting>
<replaceable>name</replaceable> = <replaceable>value </replaceable>
</programlisting>
</para>
<para>
The file is line-based - that is, each newline-terminated line represents either a comment, a section name or
a parameter.
</para>
<para>Section and parameter names are not case sensitive.</para>
<para>
Only the first equals sign in a parameter is significant. Whitespace before or after the first equals sign is
discarded. Leading, trailing and internal whitespace in section and parameter names is irrelevant. Leading
and trailing whitespace in a parameter value is discarded. Internal whitespace within a parameter value is
retained verbatim.
</para>
<para>
Any line beginning with a semicolon (<quote>;</quote>) or a hash (<quote>#</quote>)
character is ignored, as are lines containing only whitespace.
</para>
<para>
Any line ending in a <quote>\</quote> is continued on the next line in the customary UNIX fashion.
</para>
<para>
The values following the equals sign in parameters are all either a string (no quotes needed) or a boolean,
which may be given as yes/no, 0/1 or true/false. Case is not significant in boolean values, but is preserved
in string values. Some items such as create masks are numeric.
</para>
</refsect1>
<refsect1>
<title>SECTION DESCRIPTIONS</title>
<para>
Each section in the configuration file (except for the [global] section) describes a shared resource (known as
a <quote>share</quote>). The section name is the name of the shared resource and the parameters within the
section define the shares attributes.
</para>
<para>
There are three special sections, [global], [homes] and [printers], which are described under
<emphasis>special sections</emphasis>. The following notes apply to ordinary section descriptions.
</para>
<para>
A share consists of a directory to which access is being given plus a description of the access rights
which are granted to the user of the service. Some housekeeping options are also specifiable.
</para>
<para>
Sections are either file share services (used by the client as an extension of their native file systems)
or printable services (used by the client to access print services on the host running the server).
</para>
<para>
Sections may be designated <emphasis>guest</emphasis> services, in which case no password is required to
access them. A specified UNIX <emphasis>guest account</emphasis> is used to define access privileges in this
case.
</para>
<para>
Sections other than guest services will require a password to access them. The client provides the
username. As older clients only provide passwords and not usernames, you may specify a list of usernames to
check against the password using the <literal>user =</literal> option in the share definition. For modern clients
such as Windows 95/98/ME/NT/2000, this should not be necessary.
</para>
<para>
The access rights granted by the server are masked by the access rights granted to the specified or guest
UNIX user by the host system. The server does not grant more access than the host system grants.
</para>
<para>
The following sample section defines a file space share. The user has write access to the path <filename
moreinfo="none">/home/bar</filename>. The share is accessed via the share name <literal>foo</literal>:
<programlisting>
<smbconfsection name="[foo]"/>
<smbconfoption name="path">/home/bar</smbconfoption>
<smbconfoption name="read only">no</smbconfoption>
</programlisting>
</para>
<para>
The following sample section defines a printable share. The share is read-only, but printable. That is,
the only write access permitted is via calls to open, write to and close a spool file. The <emphasis>guest
ok</emphasis> parameter means access will be permitted as the default guest user (specified elsewhere):
<programlisting>
<smbconfsection name="[aprinter]"/>
<smbconfoption name="path">/usr/spool/public</smbconfoption>
<smbconfoption name="read only">yes</smbconfoption>
<smbconfoption name="printable">yes</smbconfoption>
<smbconfoption name="guest ok">yes</smbconfoption>
</programlisting>
</para>
</refsect1>
<refsect1>
<title>SPECIAL SECTIONS</title>
<refsect2>
<title>The [global] section</title>
<para>
Parameters in this section apply to the server as a whole, or are defaults for sections that do not
specifically define certain items. See the notes under PARAMETERS for more information.
</para>
</refsect2>
<refsect2 id="HOMESECT">
<title>The [homes] section</title>
<para>
If a section called [homes] is included in the configuration file, services connecting clients
to their home directories can be created on the fly by the server.
</para>
<para>
When the connection request is made, the existing sections are scanned. If a match is found, it is
used. If no match is found, the requested section name is treated as a username and looked up in the local
password file. If the name exists and the correct password has been given, a share is created by cloning the
[homes] section.
</para>
<para>
Some modifications are then made to the newly created share:
</para>
<itemizedlist>
<listitem><para>
The share name is changed from homes to the located username.
</para></listitem>
<listitem><para>
If no path was given, the path is set to the user's home directory.
</para></listitem>
</itemizedlist>
<para>
If you decide to use a <emphasis>path =</emphasis> line in your [homes] section, it may be useful
to use the %S macro. For example:
<programlisting>
<userinput moreinfo="none">path = /data/pchome/%S</userinput>
</programlisting>
is useful if you have different home directories for your PCs than for UNIX access.
</para>
<para>
This is a fast and simple way to give a large number of clients access to their home directories with a minimum
of fuss.
</para>
<para>
A similar process occurs if the requested section name is <quote>homes</quote>, except that the share
name is not changed to that of the requesting user. This method of using the [homes] section works well if
different users share a client PC.
</para>
<para>
The [homes] section can specify all the parameters a normal service section can specify, though some make more sense
than others. The following is a typical and suitable [homes] section:
<programlisting>
<smbconfsection name="[homes]"/>
<smbconfoption name="read only">no</smbconfoption>
</programlisting>
</para>
<para>
An important point is that if guest access is specified in the [homes] section, all home directories will be
visible to all clients <emphasis>without a password</emphasis>. In the very unlikely event that this is actually
desirable, it is wise to also specify <emphasis>read only access</emphasis>.
</para>
<para>
The <emphasis>browseable</emphasis> flag for auto home directories will be inherited from the global browseable
flag, not the [homes] browseable flag. This is useful as it means setting <emphasis>browseable = no</emphasis> in
the [homes] section will hide the [homes] share but make any auto home directories visible.
</para>
</refsect2>
<refsect2 id="PRINTERSSECT">
<title>The [printers] section</title>
<para>
This section works like [homes], but for printers.
</para>
<para>
If a [printers] section occurs in the configuration file, users are able to connect to any printer
specified in the local host's printcap file.
</para>
<para>
When a connection request is made, the existing sections are scanned. If a match is found, it is used.
If no match is found, but a [homes] section exists, it is used as described above. Otherwise, the requested
section name is treated as a printer name and the appropriate printcap file is scanned to see if the requested
section name is a valid printer share name. If a match is found, a new printer share is created by cloning the
[printers] section.
</para>
<para>
A few modifications are then made to the newly created share:
</para>
<itemizedlist>
<listitem><para>The share name is set to the located printer name</para></listitem>
<listitem><para>If no printer name was given, the printer name is set to the located printer name</para></listitem>
<listitem><para>If the share does not permit guest access and no username was given, the username is set
to the located printer name.</para></listitem>
</itemizedlist>
<para>
The [printers] service MUST be printable - if you specify otherwise, the server will refuse
to load the configuration file.
</para>
<para>
Typically the path specified is that of a world-writeable spool directory with the sticky bit set on
it. A typical [printers] entry looks like this:
<programlisting>
<smbconfsection name="[printers]"/>
<smbconfoption name="path">/usr/spool/public</smbconfoption>
<smbconfoption name="guest ok">yes</smbconfoption>
<smbconfoption name="printable">yes</smbconfoption>
</programlisting>
</para>
<para>
All aliases given for a printer in the printcap file are legitimate printer names as far as the server is concerned.
If your printing subsystem doesn't work like that, you will have to set up a pseudo-printcap. This is a file
consisting of one or more lines like this:
<programlisting>
alias|alias|alias|alias...
</programlisting>
</para>
<para>
Each alias should be an acceptable printer name for your printing subsystem. In the [global] section,
specify the new file as your printcap. The server will only recognize names found in your pseudo-printcap,
which of course can contain whatever aliases you like. The same technique could be used simply to limit access
to a subset of your local printers.
</para>
<para>
An alias, by the way, is defined as any component of the first entry of a printcap record. Records are separated by newlines,
components (if there are more than one) are separated by vertical bar symbols (<literal>|</literal>).
</para>
<note><para>
On SYSV systems which use lpstat to determine what printers are defined on the system you may be able to use
<literal>printcap name = lpstat</literal> to automatically obtain a list of printers. See the
<literal>printcap name</literal> option for more details.
</para></note>
</refsect2>
</refsect1>
<refsect1>
<title>USERSHARES</title>
<para>Starting with Samba version 3.0.23 the capability for non-root users to add, modify, and delete
their own share definitions has been added. This capability is called <emphasis>usershares</emphasis> and
is controlled by a set of parameters in the [global] section of the smb.conf.
The relevant parameters are :
</para>
<variablelist>
<varlistentry>
<term>usershare allow guests</term>
<listitem><para>Controls if usershares can permit guest access.</para></listitem>
</varlistentry>
<varlistentry>
<term>usershare max shares</term>
<listitem><para>Maximum number of user defined shares allowed.</para></listitem>
</varlistentry>
<varlistentry>
<term>usershare owner only</term>
<listitem><para>If set only directories owned by the sharing user can be shared.</para></listitem>
</varlistentry>
<varlistentry>
<term>usershare path</term>
<listitem><para>Points to the directory containing the user defined share definitions.
The filesystem permissions on this directory control who can create user defined shares.</para></listitem>
</varlistentry>
<varlistentry>
<term>usershare prefix allow list</term>
<listitem><para>Comma-separated list of absolute pathnames restricting what directories
can be shared. Only directories below the pathnames in this list are permitted.</para></listitem>
</varlistentry>
<varlistentry>
<term>usershare prefix deny list</term>
<listitem><para>Comma-separated list of absolute pathnames restricting what directories
can be shared. Directories below the pathnames in this list are prohibited.</para></listitem>
</varlistentry>
<varlistentry>
<term>usershare template share</term>
<listitem><para>Names a pre-existing share used as a template for creating new usershares.
All other share parameters not specified in the user defined share definition
are copied from this named share.</para></listitem>
</varlistentry>
</variablelist>
<para>To allow members of the UNIX group <literal>foo</literal> to create user defined
shares, create the directory to contain the share definitions as follows:
</para>
<para>Become root:</para>
<programlisting>
mkdir /usr/local/samba/lib/usershares
chgrp foo /usr/local/samba/lib/usershares
chmod 1770 /usr/local/samba/lib/usershares
</programlisting>
<para>Then add the parameters
<programlisting>
<smbconfoption name="usershare path">/usr/local/samba/lib/usershares</smbconfoption>
<smbconfoption name="usershare max shares">10</smbconfoption> # (or the desired number of shares)
</programlisting>
to the global
section of your <filename>smb.conf</filename>. Members of the group foo may then manipulate the user defined shares
using the following commands.</para>
<variablelist>
<varlistentry>
<term>net usershare add sharename path [comment] [acl] [guest_ok=[y|n]]</term>
<listitem><para>To create or modify (overwrite) a user defined share.</para></listitem>
</varlistentry>
<varlistentry>
<term>net usershare delete sharename</term>
<listitem><para>To delete a user defined share.</para></listitem>
</varlistentry>
<varlistentry>
<term>net usershare list wildcard-sharename</term>
<listitem><para>To list user defined shares.</para></listitem>
</varlistentry>
<varlistentry>
<term>net usershare info wildcard-sharename</term>
<listitem><para>To print information about user defined shares.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>PARAMETERS</title>
<para>Parameters define the specific attributes of sections.</para>
<para>
Some parameters are specific to the [global] section (e.g., <emphasis>security</emphasis>). Some parameters
are usable in all sections (e.g., <emphasis>create mask</emphasis>). All others are permissible only in normal
sections. For the purposes of the following descriptions the [homes] and [printers] sections will be
considered normal. The letter <emphasis>G</emphasis> in parentheses indicates that a parameter is specific to
the [global] section. The letter <emphasis>S</emphasis> indicates that a parameter can be specified in a
service specific section. All <emphasis>S</emphasis> parameters can also be specified in the [global] section
- in which case they will define the default behavior for all services.
</para>
<para>
Parameters are arranged here in alphabetical order - this may not create best bedfellows, but at least you can
find them! Where there are synonyms, the preferred synonym is described, others refer to the preferred
synonym.
</para>
</refsect1>
<refsect1>
<title>VARIABLE SUBSTITUTIONS</title>
<para>
Many of the strings that are settable in the config file can take substitutions. For example the option
<quote>path = /tmp/%u</quote> is interpreted as <quote>path = /tmp/john</quote> if the user connected with the
username john.
</para>
<para>
These substitutions are mostly noted in the descriptions below, but there are some general substitutions
which apply whenever they might be relevant. These are:
</para>
<variablelist>
<varlistentry>
<term>%U</term>
<listitem><para>session username (the username that the client wanted, not
necessarily the same as the one they got).</para></listitem>
</varlistentry>
<varlistentry>
<term>%G</term>
<listitem><para>primary group name of %U.</para></listitem>
</varlistentry>
<varlistentry>
<term>%h</term>
<listitem><para>the Internet hostname that Samba is running on.</para></listitem>
</varlistentry>
<varlistentry>
<term>%m</term>
<listitem><para>the NetBIOS name of the client machine (very useful).</para>
<para>This parameter is not available when Samba listens on port 445, as clients no longer
send this information. If you use this macro in an include statement on a domain that has
a Samba domain controller be sure to set in the [global] section <parameter>smb ports =
139</parameter>. This will cause Samba to not listen on port 445 and will permit include
functionality to function as it did with Samba 2.x.
</para></listitem>
</varlistentry>
<varlistentry>
<term>%L</term>
<listitem><para>the NetBIOS name of the server. This allows you to change your config based on what
the client calls you. Your server can have a <quote>dual personality</quote>.
</para></listitem>
</varlistentry>
<varlistentry>
<term>%M</term>
<listitem><para>the Internet name of the client machine.
</para></listitem>
</varlistentry>
<varlistentry>
<term>%R</term>
<listitem><para>the selected protocol level after protocol negotiation. It can be one of CORE, COREPLUS,
LANMAN1, LANMAN2 or NT1.</para></listitem>
</varlistentry>
<varlistentry>
<term>%d</term>
<listitem><para>the process id of the current server
process.</para></listitem>
</varlistentry>
<varlistentry>
<term>%a</term>
<listitem><para>the architecture of the remote
machine. It currently recognizes Samba (<constant>Samba</constant>),
the Linux CIFS file system (<constant>CIFSFS</constant>), OS/2, (<constant>OS2</constant>),
Windows for Workgroups (<constant>WfWg</constant>), Windows 9x/ME
(<constant>Win95</constant>), Windows NT (<constant>WinNT</constant>),
Windows 2000 (<constant>Win2K</constant>), Windows XP (<constant>WinXP</constant>),
and Windows 2003 (<constant>Win2K3</constant>). Anything else will be known as
<constant>UNKNOWN</constant>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>%I</term>
<listitem><para>the IP address of the client machine.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>%i</term>
<listitem><para>the local IP address to which a client connected.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>%T</term>
<listitem><para>the current date and time.</para></listitem>
</varlistentry>
<varlistentry>
<term>%D</term>
<listitem><para>name of the domain or workgroup of the current user.</para></listitem>
</varlistentry>
<varlistentry>
<term>%w</term>
<listitem><para>the winbind separator.</para></listitem>
</varlistentry>
<varlistentry>
<term>%$(<replaceable>envvar</replaceable>)</term>
<listitem><para>the value of the environment variable
<replaceable>envar</replaceable>.</para></listitem>
</varlistentry>
</variablelist>
<para>
The following substitutes apply only to some configuration options (only those that are
used when a connection has been established):
</para>
<variablelist>
<varlistentry>
<term>%S</term>
<listitem><para>the name of the current service, if any.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>%P</term>
<listitem><para>the root directory of the current service, if any.</para></listitem>
</varlistentry>
<varlistentry>
<term>%u</term>
<listitem><para>username of the current service, if any.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>%g</term>
<listitem><para>primary group name of %u.</para></listitem>
</varlistentry>
<varlistentry>
<term>%H</term>
<listitem><para>the home directory of the user given by %u.</para></listitem>
</varlistentry>
<varlistentry>
<term>%N</term>
<listitem><para>
the name of your NIS home directory server. This is obtained from your NIS auto.map entry.
If you have not compiled Samba with the <emphasis>--with-automount</emphasis> option, this
value will be the same as %L.</para></listitem>
</varlistentry>
<varlistentry>
<term>%p</term>
<listitem><para>
the path of the service's home directory, obtained from your NIS auto.map entry. The NIS
auto.map entry is split up as <literal>%N:%p</literal>.</para></listitem>
</varlistentry>
</variablelist>
<para>
There are some quite creative things that can be done with these substitutions and other
<filename moreinfo="none">smb.conf</filename> options.
</para>
</refsect1>
<refsect1 id="NAMEMANGLINGSECT">
<title>NAME MANGLING</title>
<para>
Samba supports <literal>name mangling</literal> so that DOS and Windows clients can use files that don't
conform to the 8.3 format. It can also be set to adjust the case of 8.3 format filenames.
</para>
<para>
There are several options that control the way mangling is performed, and they are grouped here rather
than listed separately. For the defaults look at the output of the testparm program.
</para>
<para>
These options can be set separately for each service.
</para>
<para>
The options are:
</para>
<variablelist>
<varlistentry>
<term>case sensitive = yes/no/auto</term>
<listitem><para>
controls whether filenames are case sensitive. If they aren't, Samba must do a filename search and match on
passed names. The default setting of auto allows clients that support case sensitive filenames (Linux CIFSVFS
and smbclient 3.0.5 and above currently) to tell the Samba server on a per-packet basis that they wish to
access the file system in a case-sensitive manner (to support UNIX case sensitive semantics). No Windows or
DOS system supports case-sensitive filename so setting this option to auto is that same as setting it to no
for them. Default <emphasis>auto</emphasis>.
</para></listitem>
</varlistentry>
<varlistentry>
<term>default case = upper/lower</term>
<listitem><para>
controls what the default case is for new filenames (ie. files that don't currently exist in the filesystem).
Default <emphasis>lower</emphasis>. IMPORTANT NOTE: This option will be used to modify the case of
<emphasis>all</emphasis> incoming client filenames, not just new filenames if the options <smbconfoption
name="case sensitive">yes</smbconfoption>, <smbconfoption name="preserve case">No</smbconfoption>,
<smbconfoption name="short preserve case">No</smbconfoption> are set. This change is needed as part of the
optimisations for directories containing large numbers of files.
</para></listitem>
</varlistentry>
<varlistentry>
<term>preserve case = yes/no</term>
<listitem><para>
controls whether new files (ie. files that don't currently exist in the filesystem) are created with the case
that the client passes, or if they are forced to be the <literal>default</literal> case. Default
<emphasis>yes</emphasis>.
</para></listitem>
</varlistentry>
<varlistentry>
<term>short preserve case = yes/no</term>
<listitem><para>
controls if new files (ie. files that don't currently exist in the filesystem) which conform to 8.3 syntax,
that is all in upper case and of suitable length, are created upper case, or if they are forced to be the
<literal>default</literal> case. This option can be used with <literal>preserve case = yes</literal> to permit
long filenames to retain their case, while short names are lowercased. Default <emphasis>yes</emphasis>.
</para></listitem>
</varlistentry>
</variablelist>
<para>
By default, Samba 3.0 has the same semantics as a Windows NT server, in that it is case insensitive
but case preserving. As a special case for directories with large numbers of files, if the case
options are set as follows, "case sensitive = yes", "case preserve = no", "short preserve case = no"
then the "default case" option will be applied and will modify all filenames sent from the client
when accessing this share.
</para>
</refsect1>
<refsect1 id="VALIDATIONSECT">
<title>NOTE ABOUT USERNAME/PASSWORD VALIDATION</title>
<para>
There are a number of ways in which a user can connect to a service. The server uses the following steps
in determining if it will allow a connection to a specified service. If all the steps fail, the connection
request is rejected. However, if one of the steps succeeds, the following steps are not checked.
</para>
<para>
If the service is marked <quote>guest only = yes</quote> and the server is running with share-level
security (<quote>security = share</quote>, steps 1 to 5 are skipped.
</para>
<orderedlist continuation="restarts" inheritnum="ignore" numeration="arabic">
<listitem><para>
If the client has passed a username/password pair and that username/password pair is validated by the UNIX
system's password programs, the connection is made as that username. This includes the
<literal>\\server\service%<replaceable>username</replaceable></literal> method of passing a username.
</para></listitem>
<listitem><para>
If the client has previously registered a username with the system and now supplies a correct password for that
username, the connection is allowed.
</para></listitem>
<listitem><para>
The client's NetBIOS name and any previously used usernames are checked against the supplied password. If
they match, the connection is allowed as the corresponding user.
</para></listitem>
<listitem><para>
If the client has previously validated a username/password pair with the server and the client has passed
the validation token, that username is used.
</para></listitem>
<listitem><para>
If a <literal>user = </literal> field is given in the <filename moreinfo="none">smb.conf</filename> file for the
service and the client has supplied a password, and that password matches (according to the UNIX system's
password checking) with one of the usernames from the <literal>user =</literal> field, the connection is made as
the username in the <literal>user =</literal> line. If one of the usernames in the <literal>user =</literal> list
begins with a <literal>@</literal>, that name expands to a list of names in the group of the same name.
</para></listitem>
<listitem><para>
If the service is a guest service, a connection is made as the username given in the <literal>guest account
=</literal> for the service, irrespective of the supplied password.
</para></listitem>
</orderedlist>
</refsect1>
<refsect1>
<title>EXPLANATION OF EACH PARAMETER</title>
<samba:parameterlist>
<xi:include href="../smbdotconf/parameters.all.xml" parse="xml"/>
</samba:parameterlist>
</refsect1>
<refsect1>
<title>WARNINGS</title>
<para>
Although the configuration file permits service names to contain spaces, your client software may not.
Spaces will be ignored in comparisons anyway, so it shouldn't be a problem - but be aware of the possibility.
</para>
<para>
On a similar note, many clients - especially DOS clients - limit service names to eight characters.
<citerefentry><refentrytitle>smbd</refentrytitle> <manvolnum>8</manvolnum></citerefentry> has no such
limitation, but attempts to connect from such clients will fail if they truncate the service names. For this
reason you should probably keep your service names down to eight characters in length.
</para>
<para>
Use of the <literal>[homes]</literal> and <literal>[printers]</literal> special sections make life
for an administrator easy, but the various combinations of default attributes can be tricky. Take extreme
care when designing these sections. In particular, ensure that the permissions on spool directories are
correct.
</para>
</refsect1>
<refsect1>
<title>VERSION</title>
<para>This man page is correct for version 3.0 of the Samba suite.</para>
</refsect1>
<refsect1>
<title>SEE ALSO</title>
<para>
<citerefentry><refentrytitle>samba</refentrytitle>
<manvolnum>7</manvolnum></citerefentry>, <citerefentry><refentrytitle>smbpasswd</refentrytitle>
<manvolnum>8</manvolnum></citerefentry>, <citerefentry><refentrytitle>swat</refentrytitle>
<manvolnum>8</manvolnum></citerefentry>, <citerefentry><refentrytitle>smbd</refentrytitle>
<manvolnum>8</manvolnum></citerefentry>, <citerefentry><refentrytitle>nmbd</refentrytitle>
<manvolnum>8</manvolnum></citerefentry>, <citerefentry><refentrytitle>smbclient</refentrytitle>
<manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>nmblookup</refentrytitle>
<manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>testparm</refentrytitle>
<manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>testprns</refentrytitle>
<manvolnum>1</manvolnum></citerefentry>.</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>
The original Samba man pages were written by Karl Auer. The man page sources were converted to YODL format (another
excellent piece of Open Source software, available at <ulink noescape="1" url="ftp://ftp.icce.rug.nl/pub/unix/">
ftp://ftp.icce.rug.nl/pub/unix/</ulink>) and updated for the Samba 2.0 release by Jeremy Allison. The conversion
to DocBook for Samba 2.2 was done by Gerald Carter. The conversion to DocBook XML 4.2 for Samba 3.0 was done by
Alexander Bokovoy.
</para>
</refsect1>
</refentry>
|