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
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML
><HEAD
><TITLE
>Unified Logons between Windows NT and UNIX using Winbind</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
REL="HOME"
TITLE="SAMBA Project Documentation"
HREF="samba-howto-collection.html"><LINK
REL="UP"
TITLE="Advanced Configuration"
HREF="optional.html"><LINK
REL="PREVIOUS"
TITLE="CUPS Printing Support"
HREF="cups-printing.html"><LINK
REL="NEXT"
TITLE="Integrating MS Windows networks with Samba"
HREF="integrate-ms-networks.html"></HEAD
><BODY
CLASS="CHAPTER"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>SAMBA Project Documentation</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="cups-printing.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="integrate-ms-networks.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="CHAPTER"
><H1
><A
NAME="WINBIND"
></A
>Chapter 16. Unified Logons between Windows NT and UNIX using Winbind</H1
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="AEN2573"
>16.1. Abstract</A
></H1
><P
>Integration of UNIX and Microsoft Windows NT through
a unified logon has been considered a "holy grail" in heterogeneous
computing environments for a long time. We present
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>winbind</I
></SPAN
>, a component of the Samba suite
of programs as a solution to the unified logon problem. Winbind
uses a UNIX implementation
of Microsoft RPC calls, Pluggable Authentication Modules, and the Name
Service Switch to allow Windows NT domain users to appear and operate
as UNIX users on a UNIX machine. This paper describes the winbind
system, explaining the functionality it provides, how it is configured,
and how it works internally.</P
></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="AEN2577"
>16.2. Introduction</A
></H1
><P
>It is well known that UNIX and Microsoft Windows NT have
different models for representing user and group information and
use different technologies for implementing them. This fact has
made it difficult to integrate the two systems in a satisfactory
manner.</P
><P
>One common solution in use today has been to create
identically named user accounts on both the UNIX and Windows systems
and use the Samba suite of programs to provide file and print services
between the two. This solution is far from perfect however, as
adding and deleting users on both sets of machines becomes a chore
and two sets of passwords are required both of which
can lead to synchronization problems between the UNIX and Windows
systems and confusion for users.</P
><P
>We divide the unified logon problem for UNIX machines into
three smaller problems:</P
><P
></P
><UL
><LI
><P
>Obtaining Windows NT user and group information
</P
></LI
><LI
><P
>Authenticating Windows NT users
</P
></LI
><LI
><P
>Password changing for Windows NT users
</P
></LI
></UL
><P
>Ideally, a prospective solution to the unified logon problem
would satisfy all the above components without duplication of
information on the UNIX machines and without creating additional
tasks for the system administrator when maintaining users and
groups on either system. The winbind system provides a simple
and elegant solution to all three components of the unified logon
problem.</P
></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="AEN2590"
>16.3. What Winbind Provides</A
></H1
><P
>Winbind unifies UNIX and Windows NT account management by
allowing a UNIX box to become a full member of a NT domain. Once
this is done the UNIX box will see NT users and groups as if
they were native UNIX users and groups, allowing the NT domain
to be used in much the same manner that NIS+ is used within
UNIX-only environments.</P
><P
>The end result is that whenever any
program on the UNIX machine asks the operating system to lookup
a user or group name, the query will be resolved by asking the
NT domain controller for the specified domain to do the lookup.
Because Winbind hooks into the operating system at a low level
(via the NSS name resolution modules in the C library) this
redirection to the NT domain controller is completely
transparent.</P
><P
>Users on the UNIX machine can then use NT user and group
names as they would use "native" UNIX names. They can chown files
so that they are owned by NT domain users or even login to the
UNIX machine and run a UNIX X-Window session as a domain user.</P
><P
>The only obvious indication that Winbind is being used is
that user and group names take the form DOMAIN\user and
DOMAIN\group. This is necessary as it allows Winbind to determine
that redirection to a domain controller is wanted for a particular
lookup and which trusted domain is being referenced.</P
><P
>Additionally, Winbind provides an authentication service
that hooks into the Pluggable Authentication Modules (PAM) system
to provide authentication via a NT domain to any PAM enabled
applications. This capability solves the problem of synchronizing
passwords between systems since all passwords are stored in a single
location (on the domain controller).</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2597"
>16.3.1. Target Uses</A
></H2
><P
>Winbind is targeted at organizations that have an
existing NT based domain infrastructure into which they wish
to put UNIX workstations or servers. Winbind will allow these
organizations to deploy UNIX workstations without having to
maintain a separate account infrastructure. This greatly
simplifies the administrative overhead of deploying UNIX
workstations into a NT based organization.</P
><P
>Another interesting way in which we expect Winbind to
be used is as a central part of UNIX based appliances. Appliances
that provide file and print services to Microsoft based networks
will be able to use Winbind to provide seamless integration of
the appliance into the domain.</P
></DIV
></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="AEN2601"
>16.4. How Winbind Works</A
></H1
><P
>The winbind system is designed around a client/server
architecture. A long running <B
CLASS="COMMAND"
>winbindd</B
> daemon
listens on a UNIX domain socket waiting for requests
to arrive. These requests are generated by the NSS and PAM
clients and processed sequentially.</P
><P
>The technologies used to implement winbind are described
in detail below.</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2606"
>16.4.1. Microsoft Remote Procedure Calls</A
></H2
><P
>Over the last few years, efforts have been underway
by various Samba Team members to decode various aspects of
the Microsoft Remote Procedure Call (MSRPC) system. This
system is used for most network related operations between
Windows NT machines including remote management, user authentication
and print spooling. Although initially this work was done
to aid the implementation of Primary Domain Controller (PDC)
functionality in Samba, it has also yielded a body of code which
can be used for other purposes.</P
><P
>Winbind uses various MSRPC calls to enumerate domain users
and groups and to obtain detailed information about individual
users or groups. Other MSRPC calls can be used to authenticate
NT domain users and to change user passwords. By directly querying
a Windows PDC for user and group information, winbind maps the
NT account information onto UNIX user and group names.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2610"
>16.4.2. Microsoft Active Directory Services</A
></H2
><P
> Since late 2001, Samba has gained the ability to
interact with Microsoft Windows 2000 using its 'Native
Mode' protocols, rather than the NT4 RPC services.
Using LDAP and Kerberos, a domain member running
winbind can enumerate users and groups in exactly the
same way as a Win2k client would, and in so doing
provide a much more efficient and
effective winbind implementation.
</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2613"
>16.4.3. Name Service Switch</A
></H2
><P
>The Name Service Switch, or NSS, is a feature that is
present in many UNIX operating systems. It allows system
information such as hostnames, mail aliases and user information
to be resolved from different sources. For example, a standalone
UNIX workstation may resolve system information from a series of
flat files stored on the local filesystem. A networked workstation
may first attempt to resolve system information from local files,
and then consult a NIS database for user information or a DNS server
for hostname information.</P
><P
>The NSS application programming interface allows winbind
to present itself as a source of system information when
resolving UNIX usernames and groups. Winbind uses this interface,
and information obtained from a Windows NT server using MSRPC
calls to provide a new source of account enumeration. Using standard
UNIX library calls, one can enumerate the users and groups on
a UNIX machine running winbind and see all users and groups in
a NT domain plus any trusted domain as though they were local
users and groups.</P
><P
>The primary control file for NSS is
<TT
CLASS="FILENAME"
>/etc/nsswitch.conf</TT
>.
When a UNIX application makes a request to do a lookup
the C library looks in <TT
CLASS="FILENAME"
>/etc/nsswitch.conf</TT
>
for a line which matches the service type being requested, for
example the "passwd" service type is used when user or group names
are looked up. This config line species which implementations
of that service should be tried and in what order. If the passwd
config line is:</P
><P
><B
CLASS="COMMAND"
>passwd: files example</B
></P
><P
>then the C library will first load a module called
<TT
CLASS="FILENAME"
>/lib/libnss_files.so</TT
> followed by
the module <TT
CLASS="FILENAME"
>/lib/libnss_example.so</TT
>. The
C library will dynamically load each of these modules in turn
and call resolver functions within the modules to try to resolve
the request. Once the request is resolved the C library returns the
result to the application.</P
><P
>This NSS interface provides a very easy way for Winbind
to hook into the operating system. All that needs to be done
is to put <TT
CLASS="FILENAME"
>libnss_winbind.so</TT
> in <TT
CLASS="FILENAME"
>/lib/</TT
>
then add "winbind" into <TT
CLASS="FILENAME"
>/etc/nsswitch.conf</TT
> at
the appropriate place. The C library will then call Winbind to
resolve user and group names.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2629"
>16.4.4. Pluggable Authentication Modules</A
></H2
><P
>Pluggable Authentication Modules, also known as PAM,
is a system for abstracting authentication and authorization
technologies. With a PAM module it is possible to specify different
authentication methods for different system applications without
having to recompile these applications. PAM is also useful
for implementing a particular policy for authorization. For example,
a system administrator may only allow console logins from users
stored in the local password file but only allow users resolved from
a NIS database to log in over the network.</P
><P
>Winbind uses the authentication management and password
management PAM interface to integrate Windows NT users into a
UNIX system. This allows Windows NT users to log in to a UNIX
machine and be authenticated against a suitable Primary Domain
Controller. These users can also change their passwords and have
this change take effect directly on the Primary Domain Controller.
</P
><P
>PAM is configured by providing control files in the directory
<TT
CLASS="FILENAME"
>/etc/pam.d/</TT
> for each of the services that
require authentication. When an authentication request is made
by an application the PAM code in the C library looks up this
control file to determine what modules to load to do the
authentication check and in what order. This interface makes adding
a new authentication service for Winbind very easy, all that needs
to be done is that the <TT
CLASS="FILENAME"
>pam_winbind.so</TT
> module
is copied to <TT
CLASS="FILENAME"
>/lib/security/</TT
> and the PAM
control files for relevant services are updated to allow
authentication via winbind. See the PAM documentation
for more details.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2637"
>16.4.5. User and Group ID Allocation</A
></H2
><P
>When a user or group is created under Windows NT
is it allocated a numerical relative identifier (RID). This is
slightly different to UNIX which has a range of numbers that are
used to identify users, and the same range in which to identify
groups. It is winbind's job to convert RIDs to UNIX id numbers and
vice versa. When winbind is configured it is given part of the UNIX
user id space and a part of the UNIX group id space in which to
store Windows NT users and groups. If a Windows NT user is
resolved for the first time, it is allocated the next UNIX id from
the range. The same process applies for Windows NT groups. Over
time, winbind will have mapped all Windows NT users and groups
to UNIX user ids and group ids.</P
><P
>The results of this mapping are stored persistently in
an ID mapping database held in a tdb database). This ensures that
RIDs are mapped to UNIX IDs in a consistent way.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2641"
>16.4.6. Result Caching</A
></H2
><P
>An active system can generate a lot of user and group
name lookups. To reduce the network cost of these lookups winbind
uses a caching scheme based on the SAM sequence number supplied
by NT domain controllers. User or group information returned
by a PDC is cached by winbind along with a sequence number also
returned by the PDC. This sequence number is incremented by
Windows NT whenever any user or group information is modified. If
a cached entry has expired, the sequence number is requested from
the PDC and compared against the sequence number of the cached entry.
If the sequence numbers do not match, then the cached information
is discarded and up to date information is requested directly
from the PDC.</P
></DIV
></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="AEN2644"
>16.5. Installation and Configuration</A
></H1
><P
>Many thanks to John Trostel <A
HREF="mailto:jtrostel@snapserver.com"
TARGET="_top"
>jtrostel@snapserver.com</A
>
for providing the HOWTO for this section.</P
><P
>This HOWTO describes how to get winbind services up and running
to control access and authenticate users on your Linux box using
the winbind services which come with SAMBA 2.2.2.</P
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2649"
>16.5.1. Introduction</A
></H2
><P
>This HOWTO describes the procedures used to get winbind up and
running on my RedHat 7.1 system. Winbind is capable of providing access
and authentication control for Windows Domain users through an NT
or Win2K PDC for 'regular' services, such as telnet a nd ftp, as
well for SAMBA services.</P
><P
>This HOWTO has been written from a 'RedHat-centric' perspective, so if
you are using another distribution, you may have to modify the instructions
somewhat to fit the way your distribution works.</P
><P
></P
><UL
><LI
><P
> <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Why should I to this?</I
></SPAN
>
</P
><P
>This allows the SAMBA administrator to rely on the
authentication mechanisms on the NT/Win2K PDC for the authentication
of domain members. NT/Win2K users no longer need to have separate
accounts on the SAMBA server.
</P
></LI
><LI
><P
> <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>Who should be reading this document?</I
></SPAN
>
</P
><P
> This HOWTO is designed for system administrators. If you are
implementing SAMBA on a file server and wish to (fairly easily)
integrate existing NT/Win2K users from your PDC onto the
SAMBA server, this HOWTO is for you. That said, I am no NT or PAM
expert, so you may find a better or easier way to accomplish
these tasks.
</P
></LI
></UL
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2662"
>16.5.2. Requirements</A
></H2
><P
>If you have a samba configuration file that you are currently
using... <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>BACK IT UP!</I
></SPAN
> If your system already uses PAM,
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>back up the <TT
CLASS="FILENAME"
>/etc/pam.d</TT
> directory
contents!</I
></SPAN
> If you haven't already made a boot disk,
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>MAKE ONE NOW!</I
></SPAN
></P
><P
>Messing with the pam configuration files can make it nearly impossible
to log in to yourmachine. That's why you want to be able to boot back
into your machine in single user mode and restore your
<TT
CLASS="FILENAME"
>/etc/pam.d</TT
> back to the original state they were in if
you get frustrated with the way things are going. ;-)</P
><P
>The latest version of SAMBA (version 3.0 as of this writing), now
includes a functioning winbindd daemon. Please refer to the
<A
HREF="http://samba.org/"
TARGET="_top"
>main SAMBA web page</A
> or,
better yet, your closest SAMBA mirror site for instructions on
downloading the source code.</P
><P
>To allow Domain users the ability to access SAMBA shares and
files, as well as potentially other services provided by your
SAMBA machine, PAM (pluggable authentication modules) must
be setup properly on your machine. In order to compile the
winbind modules, you should have at least the pam libraries resident
on your system. For recent RedHat systems (7.1, for instance), that
means <TT
CLASS="FILENAME"
>pam-0.74-22</TT
>. For best results, it is helpful to also
install the development packages in <TT
CLASS="FILENAME"
>pam-devel-0.74-22</TT
>.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN2676"
>16.5.3. Testing Things Out</A
></H2
><P
>Before starting, it is probably best to kill off all the SAMBA
related daemons running on your server. Kill off all <B
CLASS="COMMAND"
>smbd</B
>,
<B
CLASS="COMMAND"
>nmbd</B
>, and <B
CLASS="COMMAND"
>winbindd</B
> processes that may
be running. To use PAM, you will want to make sure that you have the
standard PAM package (for RedHat) which supplies the <TT
CLASS="FILENAME"
>/etc/pam.d</TT
>
directory structure, including the pam modules are used by pam-aware
services, several pam libraries, and the <TT
CLASS="FILENAME"
>/usr/doc</TT
>
and <TT
CLASS="FILENAME"
>/usr/man</TT
> entries for pam. Winbind built better
in SAMBA if the pam-devel package was also installed. This package includes
the header files needed to compile pam-aware applications. For instance,
my RedHat system has both <TT
CLASS="FILENAME"
>pam-0.74-22</TT
> and
<TT
CLASS="FILENAME"
>pam-devel-0.74-22</TT
> RPMs installed.</P
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN2687"
>16.5.3.1. Configure and compile SAMBA</A
></H3
><P
>The configuration and compilation of SAMBA is pretty straightforward.
The first three steps may not be necessary depending upon
whether or not you have previously built the Samba binaries.</P
><P
><PRE
CLASS="PROGRAMLISTING"
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>autoconf</B
>
<SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>make clean</B
>
<SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>rm config.cache</B
>
<SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>./configure</B
>
<SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>make</B
>
<SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>make install</B
></PRE
></P
><P
>This will, by default, install SAMBA in <TT
CLASS="FILENAME"
>/usr/local/samba</TT
>.
See the main SAMBA documentation if you want to install SAMBA somewhere else.
It will also build the winbindd executable and libraries. </P
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN2706"
>16.5.3.2. Configure <TT
CLASS="FILENAME"
>nsswitch.conf</TT
> and the
winbind libraries</A
></H3
><P
>The libraries needed to run the <B
CLASS="COMMAND"
>winbindd</B
> daemon
through nsswitch need to be copied to their proper locations, so</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>cp ../samba/source/nsswitch/libnss_winbind.so /lib</B
></P
><P
>I also found it necessary to make the following symbolic link:</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>ln -s /lib/libnss_winbind.so /lib/libnss_winbind.so.2</B
></P
><P
>And, in the case of Sun solaris:</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>ln -s /usr/lib/libnss_winbind.so /usr/lib/libnss_winbind.so.1</B
>
<SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>ln -s /usr/lib/libnss_winbind.so /usr/lib/nss_winbind.so.1</B
>
<SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>ln -s /usr/lib/libnss_winbind.so /usr/lib/nss_winbind.so.2</B
></P
><P
>Now, as root you need to edit <TT
CLASS="FILENAME"
>/etc/nsswitch.conf</TT
> to
allow user and group entries to be visible from the <B
CLASS="COMMAND"
>winbindd</B
>
daemon. My <TT
CLASS="FILENAME"
>/etc/nsswitch.conf</TT
> file look like
this after editing:</P
><P
><PRE
CLASS="PROGRAMLISTING"
> passwd: files winbind
shadow: files
group: files winbind</PRE
></P
><P
>
The libraries needed by the winbind daemon will be automatically
entered into the <B
CLASS="COMMAND"
>ldconfig</B
> cache the next time
your system reboots, but it
is faster (and you don't need to reboot) if you do it manually:</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>/sbin/ldconfig -v | grep winbind</B
></P
><P
>This makes <TT
CLASS="FILENAME"
>libnss_winbind</TT
> available to winbindd
and echos back a check to you.</P
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN2739"
>16.5.3.3. Configure smb.conf</A
></H3
><P
>Several parameters are needed in the smb.conf file to control
the behavior of <B
CLASS="COMMAND"
>winbindd</B
>. Configure
<TT
CLASS="FILENAME"
>smb.conf</TT
> These are described in more detail in
the <A
HREF="winbindd.8.html"
TARGET="_top"
>winbindd(8)</A
> man page. My
<TT
CLASS="FILENAME"
>smb.conf</TT
> file was modified to
include the following entries in the [global] section:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>[global]
<...>
# separate domain and username with '+', like DOMAIN+username
<A
HREF="winbindd.8.html#WINBINDSEPARATOR"
TARGET="_top"
>winbind separator</A
> = +
# use uids from 10000 to 20000 for domain users
<A
HREF="winbindd.8.html#WINBINDUID"
TARGET="_top"
>winbind uid</A
> = 10000-20000
# use gids from 10000 to 20000 for domain groups
<A
HREF="winbindd.8.html#WINBINDGID"
TARGET="_top"
>winbind gid</A
> = 10000-20000
# allow enumeration of winbind users and groups
<A
HREF="winbindd.8.html#WINBINDENUMUSERS"
TARGET="_top"
>winbind enum users</A
> = yes
<A
HREF="winbindd.8.html#WINBINDENUMGROUP"
TARGET="_top"
>winbind enum groups</A
> = yes
# give winbind users a real shell (only needed if they have telnet access)
<A
HREF="winbindd.8.html#TEMPLATEHOMEDIR"
TARGET="_top"
>template homedir</A
> = /home/winnt/%D/%U
<A
HREF="winbindd.8.html#TEMPLATESHELL"
TARGET="_top"
>template shell</A
> = /bin/bash</PRE
></P
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN2755"
>16.5.3.4. Join the SAMBA server to the PDC domain</A
></H3
><P
>Enter the following command to make the SAMBA server join the
PDC domain, where <VAR
CLASS="REPLACEABLE"
>DOMAIN</VAR
> is the name of
your Windows domain and <VAR
CLASS="REPLACEABLE"
>Administrator</VAR
> is
a domain user who has administrative privileges in the domain.</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>/usr/local/samba/bin/net join -S PDC -U Administrator</B
></P
><P
>The proper response to the command should be: "Joined the domain
<VAR
CLASS="REPLACEABLE"
>DOMAIN</VAR
>" where <VAR
CLASS="REPLACEABLE"
>DOMAIN</VAR
>
is your DOMAIN name.</P
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN2766"
>16.5.3.5. Start up the winbindd daemon and test it!</A
></H3
><P
>Eventually, you will want to modify your smb startup script to
automatically invoke the winbindd daemon when the other parts of
SAMBA start, but it is possible to test out just the winbind
portion first. To start up winbind services, enter the following
command as root:</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>/usr/local/samba/bin/winbindd</B
></P
><P
>Winbindd can now also run in 'dual daemon mode'. This will make it
run as 2 processes. The first will answer all requests from the cache,
thus making responses to clients faster. The other will
update the cache for the query that the first has just responded.
Advantage of this is that responses stay accurate and are faster.
You can enable dual daemon mode by adding '-B' to the commandline:</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>/usr/local/samba/bin/winbindd -B</B
></P
><P
>I'm always paranoid and like to make sure the daemon
is really running...</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>ps -ae | grep winbindd</B
></P
><P
>This command should produce output like this, if the daemon is running</P
><P
>3025 ? 00:00:00 winbindd</P
><P
>Now... for the real test, try to get some information about the
users on your PDC</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>/usr/local/samba/bin/wbinfo -u</B
></P
><P
>
This should echo back a list of users on your Windows users on
your PDC. For example, I get the following response:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>CEO+Administrator
CEO+burdell
CEO+Guest
CEO+jt-ad
CEO+krbtgt
CEO+TsInternetUser</PRE
></P
><P
>Obviously, I have named my domain 'CEO' and my <VAR
CLASS="PARAMETER"
>winbind
separator</VAR
> is '+'.</P
><P
>You can do the same sort of thing to get group information from
the PDC:</P
><P
><PRE
CLASS="PROGRAMLISTING"
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>/usr/local/samba/bin/wbinfo -g</B
>
CEO+Domain Admins
CEO+Domain Users
CEO+Domain Guests
CEO+Domain Computers
CEO+Domain Controllers
CEO+Cert Publishers
CEO+Schema Admins
CEO+Enterprise Admins
CEO+Group Policy Creator Owners</PRE
></P
><P
>The function 'getent' can now be used to get unified
lists of both local and PDC users and groups.
Try the following command:</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>getent passwd</B
></P
><P
>You should get a list that looks like your <TT
CLASS="FILENAME"
>/etc/passwd</TT
>
list followed by the domain users with their new uids, gids, home
directories and default shells.</P
><P
>The same thing can be done for groups with the command</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>getent group</B
></P
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN2806"
>16.5.3.6. Fix the init.d startup scripts</A
></H3
><DIV
CLASS="SECT4"
><H4
CLASS="SECT4"
><A
NAME="AEN2808"
>16.5.3.6.1. Linux</A
></H4
><P
>The <B
CLASS="COMMAND"
>winbindd</B
> daemon needs to start up after the
<B
CLASS="COMMAND"
>smbd</B
> and <B
CLASS="COMMAND"
>nmbd</B
> daemons are running.
To accomplish this task, you need to modify the startup scripts of your system. They are located at <TT
CLASS="FILENAME"
>/etc/init.d/smb</TT
> in RedHat and
<TT
CLASS="FILENAME"
>/etc/init.d/samba</TT
> in Debian.
script to add commands to invoke this daemon in the proper sequence. My
startup script starts up <B
CLASS="COMMAND"
>smbd</B
>,
<B
CLASS="COMMAND"
>nmbd</B
>, and <B
CLASS="COMMAND"
>winbindd</B
> from the
<TT
CLASS="FILENAME"
>/usr/local/samba/bin</TT
> directory directly. The 'start'
function in the script looks like this:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>start() {
KIND="SMB"
echo -n $"Starting $KIND services: "
daemon /usr/local/samba/bin/smbd $SMBDOPTIONS
RETVAL=$?
echo
KIND="NMB"
echo -n $"Starting $KIND services: "
daemon /usr/local/samba/bin/nmbd $NMBDOPTIONS
RETVAL2=$?
echo
KIND="Winbind"
echo -n $"Starting $KIND services: "
daemon /usr/local/samba/bin/winbindd
RETVAL3=$?
echo
[ $RETVAL -eq 0 -a $RETVAL2 -eq 0 -a $RETVAL3 -eq 0 ] && touch /var/lock/subsys/smb || \
RETVAL=1
return $RETVAL
}</PRE
></P
><P
>If you would like to run winbindd in dual daemon mode, replace
the line
<PRE
CLASS="PROGRAMLISTING"
> daemon /usr/local/samba/bin/winbindd</PRE
>
in the example above with:
<PRE
CLASS="PROGRAMLISTING"
> daemon /usr/local/samba/bin/winbindd -B</PRE
>.</P
><P
>The 'stop' function has a corresponding entry to shut down the
services and looks like this:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>stop() {
KIND="SMB"
echo -n $"Shutting down $KIND services: "
killproc smbd
RETVAL=$?
echo
KIND="NMB"
echo -n $"Shutting down $KIND services: "
killproc nmbd
RETVAL2=$?
echo
KIND="Winbind"
echo -n $"Shutting down $KIND services: "
killproc winbindd
RETVAL3=$?
[ $RETVAL -eq 0 -a $RETVAL2 -eq 0 -a $RETVAL3 -eq 0 ] && rm -f /var/lock/subsys/smb
echo ""
return $RETVAL
}</PRE
></P
></DIV
><DIV
CLASS="SECT4"
><H4
CLASS="SECT4"
><A
NAME="AEN2828"
>16.5.3.6.2. Solaris</A
></H4
><P
>On solaris, you need to modify the
<TT
CLASS="FILENAME"
>/etc/init.d/samba.server</TT
> startup script. It usually
only starts smbd and nmbd but should now start winbindd too. If you
have samba installed in <TT
CLASS="FILENAME"
>/usr/local/samba/bin</TT
>,
the file could contains something like this:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>##
## samba.server
##
if [ ! -d /usr/bin ]
then # /usr not mounted
exit
fi
killproc() { # kill the named process(es)
pid=`/usr/bin/ps -e |
/usr/bin/grep -w $1 |
/usr/bin/sed -e 's/^ *//' -e 's/ .*//'`
[ "$pid" != "" ] && kill $pid
}
# Start/stop processes required for samba server
case "$1" in
'start')
#
# Edit these lines to suit your installation (paths, workgroup, host)
#
echo Starting SMBD
/usr/local/samba/bin/smbd -D -s \
/usr/local/samba/smb.conf
echo Starting NMBD
/usr/local/samba/bin/nmbd -D -l \
/usr/local/samba/var/log -s /usr/local/samba/smb.conf
echo Starting Winbind Daemon
/usr/local/samba/bin/winbindd
;;
'stop')
killproc nmbd
killproc smbd
killproc winbindd
;;
*)
echo "Usage: /etc/init.d/samba.server { start | stop }"
;;
esac</PRE
></P
><P
>Again, if you would like to run samba in dual daemon mode, replace
<PRE
CLASS="PROGRAMLISTING"
> /usr/local/samba/bin/winbindd</PRE
>
in the script above with:
<PRE
CLASS="PROGRAMLISTING"
> /usr/local/samba/bin/winbindd -B</PRE
></P
></DIV
><DIV
CLASS="SECT4"
><H4
CLASS="SECT4"
><A
NAME="AEN2838"
>16.5.3.6.3. Restarting</A
></H4
><P
>If you restart the <B
CLASS="COMMAND"
>smbd</B
>, <B
CLASS="COMMAND"
>nmbd</B
>,
and <B
CLASS="COMMAND"
>winbindd</B
> daemons at this point, you
should be able to connect to the samba server as a domain member just as
if you were a local user.</P
></DIV
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN2844"
>16.5.3.7. Configure Winbind and PAM</A
></H3
><P
>If you have made it this far, you know that winbindd and samba are working
together. If you want to use winbind to provide authentication for other
services, keep reading. The pam configuration files need to be altered in
this step. (Did you remember to make backups of your original
<TT
CLASS="FILENAME"
>/etc/pam.d</TT
> files? If not, do it now.)</P
><P
>You will need a pam module to use winbindd with these other services. This
module will be compiled in the <TT
CLASS="FILENAME"
>../source/nsswitch</TT
> directory
by invoking the command</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>make nsswitch/pam_winbind.so</B
></P
><P
>from the <TT
CLASS="FILENAME"
>../source</TT
> directory. The
<TT
CLASS="FILENAME"
>pam_winbind.so</TT
> file should be copied to the location of
your other pam security modules. On my RedHat system, this was the
<TT
CLASS="FILENAME"
>/lib/security</TT
> directory. On Solaris, the pam security
modules reside in <TT
CLASS="FILENAME"
>/usr/lib/security</TT
>.</P
><P
><SAMP
CLASS="PROMPT"
>root#</SAMP
> <B
CLASS="COMMAND"
>cp ../samba/source/nsswitch/pam_winbind.so /lib/security</B
></P
><DIV
CLASS="SECT4"
><H4
CLASS="SECT4"
><A
NAME="AEN2861"
>16.5.3.7.1. Linux/FreeBSD-specific PAM configuration</A
></H4
><P
>The <TT
CLASS="FILENAME"
>/etc/pam.d/samba</TT
> file does not need to be changed. I
just left this fileas it was:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>auth required /lib/security/pam_stack.so service=system-auth
account required /lib/security/pam_stack.so service=system-auth</PRE
></P
><P
>The other services that I modified to allow the use of winbind
as an authentication service were the normal login on the console (or a terminal
session), telnet logins, and ftp service. In order to enable these
services, you may first need to change the entries in
<TT
CLASS="FILENAME"
>/etc/xinetd.d</TT
> (or <TT
CLASS="FILENAME"
>/etc/inetd.conf</TT
>).
RedHat 7.1 uses the new xinetd.d structure, in this case you need
to change the lines in <TT
CLASS="FILENAME"
>/etc/xinetd.d/telnet</TT
>
and <TT
CLASS="FILENAME"
>/etc/xinetd.d/wu-ftp</TT
> from </P
><P
><PRE
CLASS="PROGRAMLISTING"
>enable = no</PRE
></P
><P
>to</P
><P
><PRE
CLASS="PROGRAMLISTING"
>enable = yes</PRE
></P
><P
>
For ftp services to work properly, you will also need to either
have individual directories for the domain users already present on
the server, or change the home directory template to a general
directory for all domain users. These can be easily set using
the <TT
CLASS="FILENAME"
>smb.conf</TT
> global entry
<B
CLASS="COMMAND"
>template homedir</B
>.</P
><P
>The <TT
CLASS="FILENAME"
>/etc/pam.d/ftp</TT
> file can be changed
to allow winbind ftp access in a manner similar to the
samba file. My <TT
CLASS="FILENAME"
>/etc/pam.d/ftp</TT
> file was
changed to look like this:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>auth required /lib/security/pam_listfile.so item=user sense=deny file=/etc/ftpusers onerr=succeed
auth sufficient /lib/security/pam_winbind.so
auth required /lib/security/pam_stack.so service=system-auth
auth required /lib/security/pam_shells.so
account sufficient /lib/security/pam_winbind.so
account required /lib/security/pam_stack.so service=system-auth
session required /lib/security/pam_stack.so service=system-auth</PRE
></P
><P
>The <TT
CLASS="FILENAME"
>/etc/pam.d/login</TT
> file can be changed nearly the
same way. It now looks like this:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>auth required /lib/security/pam_securetty.so
auth sufficient /lib/security/pam_winbind.so
auth sufficient /lib/security/pam_unix.so use_first_pass
auth required /lib/security/pam_stack.so service=system-auth
auth required /lib/security/pam_nologin.so
account sufficient /lib/security/pam_winbind.so
account required /lib/security/pam_stack.so service=system-auth
password required /lib/security/pam_stack.so service=system-auth
session required /lib/security/pam_stack.so service=system-auth
session optional /lib/security/pam_console.so</PRE
></P
><P
>In this case, I added the <B
CLASS="COMMAND"
>auth sufficient /lib/security/pam_winbind.so</B
>
lines as before, but also added the <B
CLASS="COMMAND"
>required pam_securetty.so</B
>
above it, to disallow root logins over the network. I also added a
<B
CLASS="COMMAND"
>sufficient /lib/security/pam_unix.so use_first_pass</B
>
line after the <B
CLASS="COMMAND"
>winbind.so</B
> line to get rid of annoying
double prompts for passwords.</P
></DIV
><DIV
CLASS="SECT4"
><H4
CLASS="SECT4"
><A
NAME="AEN2894"
>16.5.3.7.2. Solaris-specific configuration</A
></H4
><P
>The /etc/pam.conf needs to be changed. I changed this file so that my Domain
users can logon both locally as well as telnet.The following are the changes
that I made.You can customize the pam.conf file as per your requirements,but
be sure of those changes because in the worst case it will leave your system
nearly impossible to boot.</P
><P
><PRE
CLASS="PROGRAMLISTING"
>#
#ident "@(#)pam.conf 1.14 99/09/16 SMI"
#
# Copyright (c) 1996-1999, Sun Microsystems, Inc.
# All Rights Reserved.
#
# PAM configuration
#
# Authentication management
#
login auth required /usr/lib/security/pam_winbind.so
login auth required /usr/lib/security/$ISA/pam_unix.so.1 try_first_pass
login auth required /usr/lib/security/$ISA/pam_dial_auth.so.1 try_first_pass
#
rlogin auth sufficient /usr/lib/security/pam_winbind.so
rlogin auth sufficient /usr/lib/security/$ISA/pam_rhosts_auth.so.1
rlogin auth required /usr/lib/security/$ISA/pam_unix.so.1 try_first_pass
#
dtlogin auth sufficient /usr/lib/security/pam_winbind.so
dtlogin auth required /usr/lib/security/$ISA/pam_unix.so.1 try_first_pass
#
rsh auth required /usr/lib/security/$ISA/pam_rhosts_auth.so.1
other auth sufficient /usr/lib/security/pam_winbind.so
other auth required /usr/lib/security/$ISA/pam_unix.so.1 try_first_pass
#
# Account management
#
login account sufficient /usr/lib/security/pam_winbind.so
login account requisite /usr/lib/security/$ISA/pam_roles.so.1
login account required /usr/lib/security/$ISA/pam_unix.so.1
#
dtlogin account sufficient /usr/lib/security/pam_winbind.so
dtlogin account requisite /usr/lib/security/$ISA/pam_roles.so.1
dtlogin account required /usr/lib/security/$ISA/pam_unix.so.1
#
other account sufficient /usr/lib/security/pam_winbind.so
other account requisite /usr/lib/security/$ISA/pam_roles.so.1
other account required /usr/lib/security/$ISA/pam_unix.so.1
#
# Session management
#
other session required /usr/lib/security/$ISA/pam_unix.so.1
#
# Password management
#
#other password sufficient /usr/lib/security/pam_winbind.so
other password required /usr/lib/security/$ISA/pam_unix.so.1
dtsession auth required /usr/lib/security/$ISA/pam_unix.so.1
#
# Support for Kerberos V5 authentication (uncomment to use Kerberos)
#
#rlogin auth optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass
#login auth optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass
#dtlogin auth optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass
#other auth optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass
#dtlogin account optional /usr/lib/security/$ISA/pam_krb5.so.1
#other account optional /usr/lib/security/$ISA/pam_krb5.so.1
#other session optional /usr/lib/security/$ISA/pam_krb5.so.1
#other password optional /usr/lib/security/$ISA/pam_krb5.so.1 try_first_pass</PRE
></P
><P
>I also added a try_first_pass line after the winbind.so line to get rid of
annoying double prompts for passwords.</P
><P
>Now restart your Samba and try connecting through your application that you
configured in the pam.conf.</P
></DIV
></DIV
></DIV
></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="AEN2901"
>16.6. Limitations</A
></H1
><P
>Winbind has a number of limitations in its current
released version that we hope to overcome in future
releases:</P
><P
></P
><UL
><LI
><P
>Winbind is currently only available for
the Linux, Solaris and IRIX operating systems, although ports to other operating
systems are certainly possible. For such ports to be feasible,
we require the C library of the target operating system to
support the Name Service Switch and Pluggable Authentication
Modules systems. This is becoming more common as NSS and
PAM gain support among UNIX vendors.</P
></LI
><LI
><P
>The mappings of Windows NT RIDs to UNIX ids
is not made algorithmically and depends on the order in which
unmapped users or groups are seen by winbind. It may be difficult
to recover the mappings of rid to UNIX id mapping if the file
containing this information is corrupted or destroyed.</P
></LI
><LI
><P
>Currently the winbind PAM module does not take
into account possible workstation and logon time restrictions
that may be been set for Windows NT users, this is
instead up to the PDC to enforce.</P
></LI
></UL
></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="AEN2911"
>16.7. Conclusion</A
></H1
><P
>The winbind system, through the use of the Name Service
Switch, Pluggable Authentication Modules, and appropriate
Microsoft RPC calls have allowed us to provide seamless
integration of Microsoft Windows NT domain users on a
UNIX system. The result is a great reduction in the administrative
cost of running a mixed UNIX and NT network.</P
></DIV
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="cups-printing.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="samba-howto-collection.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="integrate-ms-networks.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>CUPS Printing Support</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="optional.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Integrating MS Windows networks with Samba</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
|
