summaryrefslogtreecommitdiff
path: root/docs/htmldocs/smbd.8.html
blob: be82ef6d4ecc4f6f100a5845c1166f39cd27f895 (plain)
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
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
<HTML
><HEAD
><TITLE
>smbd</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.57"></HEAD
><BODY
CLASS="REFENTRY"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><H1
><A
NAME="SMBD"
>smbd</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5"
></A
><H2
>Name</H2
>smbd&nbsp;--&nbsp;server to provide SMB/CIFS services to clients</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN8"
></A
><H2
>Synopsis</H2
><P
><B
CLASS="COMMAND"
>smbd</B
>  [-D] [-a] [-o] [-P] [-h] [-V] [-d &#60;debug level&#62;] [-l &#60;log file&#62;] [-p &#60;port number&#62;] [-O &#60;socket option&#62;] [-s &#60;configuration file&#62;]</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN22"
></A
><H2
>DESCRIPTION</H2
><P
>This program is part of the Samba suite.</P
><P
><B
CLASS="COMMAND"
>smbd</B
> is the server daemon that 
	provides filesharing and printing services to Windows clients. 
	The server provides filespace and printer services to
	clients using the SMB (or CIFS) protocol. This is compatible 
	with the LanManager protocol, and can service LanManager 
	clients.  These include MSCLIENT 3.0 for DOS, Windows for 
	Workgroups, Windows 95/98/ME, Windows NT, Windows 2000, 
	OS/2, DAVE for Macintosh, and smbfs for Linux.</P
><P
>An extensive description of the services that the 
	server can provide is given in the man page for the 
	configuration file controlling the attributes of those 
	services (see <A
HREF="smb.conf.5.html"
TARGET="_top"
><TT
CLASS="FILENAME"
>smb.conf(5)
	</TT
></A
>.  This man page will not describe the 
	services, but will concentrate on the administrative aspects 
	of running the server.</P
><P
>Please note that there are significant security 
	implications to running this server, and the <A
HREF="smb.conf.5.html"
TARGET="_top"
><TT
CLASS="FILENAME"
>smb.conf(5)</TT
></A
> 
	manpage should be regarded as mandatory reading before 
	proceeding with installation.</P
><P
>A session is created whenever a client requests one. 
	Each client gets a copy of the server for each session. This 
	copy then services all connections made by the client during 
	that session. When all connections from its client are closed, 
	the copy of the server for that client terminates.</P
><P
>The configuration file, and any files that it includes, 
	are automatically reloaded every minute, if they change.  You 
	can force a reload by sending a SIGHUP to the server.  Reloading 
	the configuration file will not affect connections to any service 
	that is already established.  Either the user will have to 
	disconnect from the service, or <B
CLASS="COMMAND"
>smbd</B
> killed and restarted.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN36"
></A
><H2
>OPTIONS</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
>-D</DT
><DD
><P
>If specified, this parameter causes 
		the server to operate as a daemon. That is, it detaches 
		itself and runs in the background, fielding requests 
		on the appropriate port. Operating the server as a
		daemon is the recommended way of running <B
CLASS="COMMAND"
>smbd</B
> for 
		servers that provide more than casual use file and 
		print services.  This switch is assumed if <B
CLASS="COMMAND"
>smbd
		</B
> is executed on the command line of a shell.
		</P
></DD
><DT
>-a</DT
><DD
><P
>If this parameter is specified, each new 
		connection will append log messages to the log file.  
		This is the default.</P
></DD
><DT
>-o</DT
><DD
><P
>If this parameter is specified, the 
		log files will be overwritten when opened.  By default, 
		<B
CLASS="COMMAND"
>smbd</B
> will append entries to the log 
		files.</P
></DD
><DT
>-P</DT
><DD
><P
>Passive option. Causes <B
CLASS="COMMAND"
>smbd</B
> not to 
		send any network traffic out. Used for debugging by 
		the developers only.</P
></DD
><DT
>-h</DT
><DD
><P
>Prints the help information (usage) 
		for <B
CLASS="COMMAND"
>smbd</B
>.</P
></DD
><DT
>-v</DT
><DD
><P
>Prints the version number for 
		<B
CLASS="COMMAND"
>smbd</B
>.</P
></DD
><DT
>-d &#60;debug level&#62;</DT
><DD
><P
><TT
CLASS="REPLACEABLE"
><I
>debuglevel</I
></TT
> is an integer 
		from 0 to 10.  The default value if this parameter is 
		not specified is zero.</P
><P
>The higher this value, the more detail will be 
		logged to the log files about the activities of the 
		server. At level 0, only critical errors and serious 
		warnings will be logged. Level 1 is a reasonable level for
		day to day running - it generates a small amount of 
		information about operations carried out.</P
><P
>Levels above 1 will generate considerable 
		amounts of log data, and should only be used when 
		investigating a problem. Levels above 3 are designed for 
		use only by developers and generate HUGE amounts of log
		data, most of which is extremely cryptic.</P
><P
>Note that specifying this parameter here will 
		override the <A
HREF="smb.conf.5.html#loglevel"
TARGET="_top"
>log
		level</A
> parameter in the <A
HREF="smb.conf.5.html"
TARGET="_top"
>		<TT
CLASS="FILENAME"
>smb.conf(5)</TT
></A
> file.</P
></DD
><DT
>-l &#60;log file&#62;</DT
><DD
><P
>If specified, <TT
CLASS="REPLACEABLE"
><I
>log file</I
></TT
> 
		specifies a log filename into which informational and debug 
		messages from the running server will be logged. The log 
		file generated is never removed by the server although 
		its size may be controlled by the <A
HREF="smb.conf.5.html#maxlogsize"
TARGET="_top"
>max log size</A
>
		option in the <A
HREF="smb.conf.5.html"
TARGET="_top"
><TT
CLASS="FILENAME"
>		smb.conf(5)</TT
></A
> file.  The default log 
		file name is specified at compile time.</P
></DD
><DT
>-O &#60;socket options&#62;</DT
><DD
><P
>See the <A
HREF="smb.conf.5.html#socketoptions"
TARGET="_top"
>socket options</A
> 
		parameter in the <A
HREF="smb.conf.5.html"
TARGET="_top"
><TT
CLASS="FILENAME"
>smb.conf(5)
		</TT
></A
> file for details.</P
></DD
><DT
>-p &#60;port number&#62;</DT
><DD
><P
><TT
CLASS="REPLACEABLE"
><I
>port number</I
></TT
> is a positive integer 
		value.  The default value if this parameter is not 
		specified is 139.</P
><P
>This number is the port number that will be 
		used when making connections to the server from client 
		software. The standard (well-known) port number for the 
		SMB over TCP is 139, hence the default. If you wish to 
		run the server as an ordinary user rather than
		as root, most systems will require you to use a port 
		number greater than 1024 - ask your system administrator 
		for help if you are in this situation.</P
><P
>In order for the server to be useful by most 
		clients, should you configure it on a port other 
		than 139, you will require port redirection services 
		on port 139, details of which are outlined in rfc1002.txt 
		section 4.3.5.</P
><P
>This parameter is not normally specified except 
		in the above situation.</P
></DD
><DT
>-s &#60;configuration file&#62;</DT
><DD
><P
>The file specified contains the 
		configuration details required by the server.  The 
		information in this file includes server-specific
		information such as what printcap file to use, as well 
		as descriptions of all the services that the server is 
		to provide. See <A
HREF="smb.conf.5.html"
TARGET="_top"
><TT
CLASS="FILENAME"
>		smb.conf(5)</TT
></A
> for more information.
		The default configuration file name is determined at 
		compile time.</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN109"
></A
><H2
>FILES</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="FILENAME"
>/etc/inetd.conf</TT
></DT
><DD
><P
>If the server is to be run by the 
		<B
CLASS="COMMAND"
>inetd</B
> meta-daemon, this file 
		must contain suitable startup information for the 
		meta-daemon. See the section INSTALLATION below.
		</P
></DD
><DT
><TT
CLASS="FILENAME"
>/etc/rc</TT
></DT
><DD
><P
>or whatever initialization script your 
		system uses).</P
><P
>If running the server as a daemon at startup, 
		this file will need to contain an appropriate startup 
		sequence for the server. See the section INSTALLATION 
		below.</P
></DD
><DT
><TT
CLASS="FILENAME"
>/etc/services</TT
></DT
><DD
><P
>If running the server via the 
		meta-daemon <B
CLASS="COMMAND"
>inetd</B
>, this file 
		must contain a mapping of service name (e.g., netbios-ssn) 
		to service port (e.g., 139) and protocol type (e.g., tcp). 
		See the section INSTALLATION below.</P
></DD
><DT
><TT
CLASS="FILENAME"
>/usr/local/samba/lib/smb.conf</TT
></DT
><DD
><P
>This is the default location of the 
		<A
HREF="smb.conf.5.html"
TARGET="_top"
><TT
CLASS="FILENAME"
>smb.conf</TT
></A
>
		server configuration file. Other common places that systems 
		install this file are <TT
CLASS="FILENAME"
>/usr/samba/lib/smb.conf</TT
> 
		and <TT
CLASS="FILENAME"
>/etc/smb.conf</TT
>.</P
><P
>This file describes all the services the server 
		is to make available to clients. See <A
HREF="smb.conf.5.html"
TARGET="_top"
>		<TT
CLASS="FILENAME"
>smb.conf(5)</TT
></A
>  for more information.</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN142"
></A
><H2
>LIMITATIONS</H2
><P
>On some systems <B
CLASS="COMMAND"
>smbd</B
> cannot change uid back 
	to root after a setuid() call.  Such systems are called 
	trapdoor uid systems. If you have such a system, 
	you will be unable to connect from a client (such as a PC) as 
	two different users at once. Attempts to connect the
	second user will result in access denied or 
	similar.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN146"
></A
><H2
>ENVIRONMENTVARIABLES</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="ENVAR"
>PRINTER</TT
></DT
><DD
><P
>If no printer name is specified to 
		printable services, most systems will use the value of 
		this variable (or <TT
CLASS="CONSTANT"
>lp</TT
> if this variable is 
		not defined) as the name of the printer to use. This 
		is not specific to the server, however.</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN155"
></A
><H2
>INSTALLATION</H2
><P
>The location of the server and its support files 
	is a matter for individual system administrators. The following 
	are thus suggestions only.</P
><P
>It is recommended that the server software be installed 
	under the <TT
CLASS="FILENAME"
>/usr/local/samba/</TT
> hierarchy, 
	in a directory readable by all, writeable only by root. The server 
	program itself should be executable by all, as users may wish to 
	run the server themselves (in which case it will of course run 
	with their privileges).  The server should NOT be setuid. On some 
	systems it may be worthwhile to make <B
CLASS="COMMAND"
>smbd</B
> setgid to an empty group. 
	This is because some systems may have a security hole where daemon 
	processes that become a user can be attached to with a debugger. 
	Making the <B
CLASS="COMMAND"
>smbd</B
> file setgid to an empty group may prevent
	this hole from being exploited. This security hole and the suggested
	fix has only been confirmed on old versions (pre-kernel 2.0) of Linux
	at the time this was written. It is possible that this hole only
	exists in Linux, as testing on other systems has thus far shown them
	to be immune.</P
><P
>The server log files should be put in a directory readable and
	writeable only by root, as the log files may contain sensitive
	information.</P
><P
>The configuration file should be placed in a directory 
	readable and writeable only by root, as the configuration file 
	controls security for the services offered by the server. The 
	configuration file can be made readable by all if desired, but 
	this is not necessary for correct operation of the server and is 
	not recommended. A sample configuration file <TT
CLASS="FILENAME"
>smb.conf.sample
	</TT
> is supplied with the source to the server - this may 
	be renamed to <TT
CLASS="FILENAME"
>smb.conf</TT
> and modified to suit 
	your needs.</P
><P
>The remaining notes will assume the following:</P
><P
></P
><UL
><LI
><P
><B
CLASS="COMMAND"
>smbd</B
> (the server program) 
		installed in <TT
CLASS="FILENAME"
>/usr/local/samba/bin</TT
></P
></LI
><LI
><P
><TT
CLASS="FILENAME"
>smb.conf</TT
> (the configuration 
		file) installed in <TT
CLASS="FILENAME"
>/usr/local/samba/lib</TT
></P
></LI
><LI
><P
>log files stored in <TT
CLASS="FILENAME"
>/var/adm/smblogs
		</TT
></P
></LI
></UL
><P
>The server may be run either as a daemon by users 
	or at startup, or it may be run from a meta-daemon such as 
	<B
CLASS="COMMAND"
>inetd</B
> upon request. If run as a daemon, 
	the server will always be ready, so starting sessions will be
	faster. If run from a meta-daemon some memory will be saved and
	utilities such as the tcpd TCP-wrapper may be used for extra 
	security.  For serious use as file server it is recommended 
	that <B
CLASS="COMMAND"
>smbd</B
> be run as a daemon.</P
><P
>When you've decided, continue with either</P
><P
></P
><UL
><LI
><P
>RUNNING THE SERVER AS A DAEMON or</P
></LI
><LI
><P
>RUNNING THE SERVER ON REQUEST.</P
></LI
></UL
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN188"
></A
><H2
>RUNNING THE SERVER AS A DAEMON</H2
><P
>To run the server as a daemon from the command 
	line, simply put the <EM
>-D</EM
> option on the 
	command line. There is no need to place an ampersand at 
	the end of the command line - the <EM
>-D</EM
> 
	option causes the server to detach itself from the tty 
	anyway.</P
><P
>Any user can run the server as a daemon (execute 
	permissions permitting, of course). This is useful for 
	testing purposes, and may even be useful as a temporary 
	substitute for something like ftp. When run this way, however, 
	the server will only have the privileges of the user who ran 
	it.</P
><P
>To ensure that the server is run as a daemon whenever 
	the machine is started, and to ensure that it runs as root 
	so that it can serve multiple clients, you will need to modify 
	the system startup files. Wherever appropriate (for example, in 
	<TT
CLASS="FILENAME"
>/etc/rc</TT
>), insert the following line, 
	substituting port number, log file location, configuration file 
	location and debug level as desired:</P
><P
><B
CLASS="COMMAND"
>/usr/local/samba/bin/smbd -D -l /var/adm/smblogs/log 
	-s /usr/local/samba/lib/smb.conf</B
></P
><P
>(The above should appear in your initialization script 
	as a single line.  Depending on your terminal characteristics, 
	it may not appear that way in this man page. If the above appears 
	as more than one line, please treat any newlines or indentation 
	as a single space or TAB character.)</P
><P
>If the options used at compile time are appropriate for 
	your system, all parameters except <EM
>-D</EM
> may 
	be omitted. See the section OPTIONS above.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN201"
></A
><H2
>RUNNING THE SERVER ON REQUEST</H2
><P
>If your system uses a meta-daemon such as <B
CLASS="COMMAND"
>inetd
	</B
>, you can arrange to have the <B
CLASS="COMMAND"
>smbd</B
> server started 
	whenever a process attempts to connect to it. This requires several 
	changes to the startup files on the host machine. If you are 
	experimenting as an ordinary user rather than as root, you will 
	need the assistance of your system administrator to modify the 
	system files.</P
><P
>You will probably want to set up the NetBIOS name server 
	<A
HREF="nmbd.8.html"
TARGET="_top"
><B
CLASS="COMMAND"
>nmbd</B
></A
> at
	the same time as <B
CLASS="COMMAND"
>smbd</B
>. To do this refer to the 
	man page for <A
HREF="nmbd.8.html"
TARGET="_top"
><B
CLASS="COMMAND"
>nmbd(8)</B
>
	</A
>.</P
><P
>First, ensure that a port is configured in the file 
	<TT
CLASS="FILENAME"
>/etc/services</TT
>. The well-known port 139 
	should be used if possible, though any port may be used.</P
><P
>Ensure that a line similar to the following is in 
	<TT
CLASS="FILENAME"
>/etc/services</TT
>:</P
><P
><B
CLASS="COMMAND"
>netbios-ssn	139/tcp</B
></P
><P
>Note for NIS/YP users - you may need to rebuild the 
	NIS service maps rather than alter your local <TT
CLASS="FILENAME"
>/etc/services
	</TT
> file.</P
><P
>Next, put a suitable line in the file <TT
CLASS="FILENAME"
>/etc/inetd.conf
	</TT
> (in the unlikely event that you are using a meta-daemon 
	other than inetd, you are on your own). Note that the first item 
	in this line matches the service name in <TT
CLASS="FILENAME"
>/etc/services
	</TT
>.  Substitute appropriate values for your system
	in this line (see <B
CLASS="COMMAND"
>inetd(8)</B
>):</P
><P
><B
CLASS="COMMAND"
>netbios-ssn stream tcp nowait root /usr/local/samba/bin/smbd 
	-d1 -l/var/adm/smblogs/log -s/usr/local/samba/lib/smb.conf</B
></P
><P
>(The above should appear in <TT
CLASS="FILENAME"
>/etc/inetd.conf</TT
> 
	as a single line. Depending on your terminal characteristics, it may 
	not appear that way in this man page.  If the above appears as more 
	than one line, please treat any newlines or indentation as a single 
	space or TAB character.)</P
><P
>Note that there is no need to specify a port number here, 
	even if you are using a non-standard port number.</P
><P
>Lastly, edit the configuration file to provide suitable 
	services. To start with, the following two services should be 
	all you need:</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="SCREEN"
>	<TT
CLASS="COMPUTEROUTPUT"
>	[homes]
		writeable = yes

	[printers]
		writeable = no
		printable = yes
		path = /tmp
		public = yes
	</TT
>
	</PRE
></TD
></TR
></TABLE
><P
>This will allow you to connect to your home directory 
	and print to any printer supported by the host (user privileges 
	permitting).</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN233"
></A
><H2
>PAM INTERACTION</H2
><P
>Samba uses PAM for authentication (when presented with a plaintext 
	password), for account checking (is this account disabled?) and for
	session management.  The degree too which samba supports PAM is restricted
	by the limitations of the SMB protocol and the 
	<A
HREF="smb.conf.5.html#OBEYPAMRESRICTIONS"
TARGET="_top"
>obey pam restricions</A
>
	smb.conf paramater.  When this is set, the following restrictions apply:
	</P
><P
></P
><UL
><LI
><P
><EM
>Account Validation</EM
>:  All acccesses to a 
	samba server are checked 
	against PAM to see if the account is vaild, not disabled and is permitted to 
	login at this time.  This also applies to encrypted logins.
	</P
></LI
><LI
><P
><EM
>Session Management</EM
>:  When not using share 
	level secuirty, users must pass PAM's session checks before access 
	is granted.  Note however, that this is bypassed in share level secuirty.  
	Note also that some older pam configuration files may need a line 
	added for session support. 
	</P
></LI
></UL
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN244"
></A
><H2
>TESTING THE INSTALLATION</H2
><P
>If running the server as a daemon, execute it before 
	proceeding. If using a meta-daemon, either restart the system 
	or kill and restart the meta-daemon. Some versions of 
	<B
CLASS="COMMAND"
>inetd</B
> will reread their configuration
	tables if they receive a HUP signal.</P
><P
>If your machine's name is <TT
CLASS="REPLACEABLE"
><I
>fred</I
></TT
> and your 
	name is <TT
CLASS="REPLACEABLE"
><I
>mary</I
></TT
>, you should now be able to connect 
	to the service <TT
CLASS="FILENAME"
>\\fred\mary</TT
>.
	</P
><P
>To properly test and experiment with the server, we 
	recommend using the <B
CLASS="COMMAND"
>smbclient</B
> program (see 
	<A
HREF="smbclient.1.html"
TARGET="_top"
><B
CLASS="COMMAND"
>smbclient(1)</B
></A
>) 
	and also going through the steps outlined in the file 
	<TT
CLASS="FILENAME"
>DIAGNOSIS.txt</TT
> in the <TT
CLASS="FILENAME"
>docs/</TT
>
	directory of your Samba installation.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN258"
></A
><H2
>VERSION</H2
><P
>This man page is correct for version 2.2 of 
	the Samba suite.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN261"
></A
><H2
>DIAGNOSTICS</H2
><P
>Most diagnostics issued by the server are logged 
	in a specified log file. The log file name is specified 
	at compile time, but may be overridden on the command line.</P
><P
>The number and nature of diagnostics available depends 
	on the debug level used by the server. If you have problems, set 
	the debug level to 3 and peruse the log files.</P
><P
>Most messages are reasonably self-explanatory. Unfortunately, 
	at the time this man page was created, there are too many diagnostics 
	available in the source code to warrant describing each and every 
	diagnostic. At this stage your best bet is still to grep the 
	source code and inspect the conditions that gave rise to the 
	diagnostics you are seeing.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN266"
></A
><H2
>SIGNALS</H2
><P
>Sending the <B
CLASS="COMMAND"
>smbd</B
> a SIGHUP will cause it to 
	reload its <TT
CLASS="FILENAME"
>smb.conf</TT
> configuration 
	file within a short period of time.</P
><P
>To shut down a user's <B
CLASS="COMMAND"
>smbd</B
> process it is recommended 
	that <B
CLASS="COMMAND"
>SIGKILL (-9)</B
> <EM
>NOT</EM
> 
	be used, except as a last resort, as this may leave the shared
	memory area in an inconsistent state. The safe way to terminate 
	an <B
CLASS="COMMAND"
>smbd</B
> is to send it a SIGTERM (-15) signal and wait for 
	it to die on its own.</P
><P
>The debug log level of <B
CLASS="COMMAND"
>smbd</B
> may be raised
	or lowered using <A
HREF="smbcontrol.1.html"
TARGET="_top"
><B
CLASS="COMMAND"
>smbcontrol(1)
	</B
></A
> program (SIGUSR[1|2] signals are no longer used in
	Samba 2.2). This is to allow transient problems to be diagnosed, 
	whilst still running at a normally low log level.</P
><P
>Note that as the signal handlers send a debug write, 
	they are not re-entrant in <B
CLASS="COMMAND"
>smbd</B
>. This you should wait until 
	<B
CLASS="COMMAND"
>smbd</B
> is in a state of waiting for an incoming SMB before 
	issuing them. It is possible to make the signal handlers safe 
	by un-blocking the signals before the select call and re-blocking 
	them after, however this would affect performance.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN283"
></A
><H2
>SEE ALSO</H2
><P
>hosts_access(5), <B
CLASS="COMMAND"
>inetd(8)</B
>, 
	<A
HREF="nmbd.8.html"
TARGET="_top"
><B
CLASS="COMMAND"
>nmbd(8)</B
></A
>, 
	<A
HREF="smb.conf.5.html"
TARGET="_top"
><TT
CLASS="FILENAME"
>smb.conf(5)</TT
>
	</A
>, <A
HREF="smbclient.1.html"
TARGET="_top"
><B
CLASS="COMMAND"
>smbclient(1)
	</B
></A
>, <A
HREF="testparm.1.html"
TARGET="_top"
><B
CLASS="COMMAND"
>	testparm(1)</B
></A
>, <A
HREF="testprns.1.html"
TARGET="_top"
>	<B
CLASS="COMMAND"
>testprns(1)</B
></A
>, and the Internet RFC's
	<TT
CLASS="FILENAME"
>rfc1001.txt</TT
>, <TT
CLASS="FILENAME"
>rfc1002.txt</TT
>. 
	In addition the CIFS (formerly SMB) specification is available 
	as a link from the Web page <A
HREF="http://samba.org/cifs/"
TARGET="_top"
> 
	http://samba.org/cifs/</A
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN300"
></A
><H2
>AUTHOR</H2
><P
>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.</P
><P
>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
	<A
HREF="ftp://ftp.icce.rug.nl/pub/unix/"
TARGET="_top"
>	ftp://ftp.icce.rug.nl/pub/unix/</A
>) and updated for the Samba 2.0 
	release by Jeremy Allison.  The conversion to DocBook for 
	Samba 2.2 was done by Gerald Carter</P
></DIV
></BODY
></HTML
>