Newer
Older
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
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" />
<!--
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
This file is generated from xml source: DO NOT EDIT
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-->
<title>mod_authnz_ldap - Apache HTTP Server Version 2.4</title>
<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" />
<script src="../style/scripts/prettify.min.js" type="text/javascript">
</script>
<link href="../images/favicon.ico" rel="shortcut icon" /></head>
<body>
<div id="page-header">
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
<p class="apache">Apache HTTP Server Version 2.4</p>
<img alt="" src="../images/feather.png" /></div>
<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
<div id="path">
<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div>
<div id="page-content">
<div id="preamble"><h1>Apache Module mod_authnz_ldap</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_authnz_ldap.html" title="English"> en </a> |
<a href="../fr/mod/mod_authnz_ldap.html" hreflang="fr" rel="alternate" title="Franais"> fr </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Allows an LDAP directory to be used to store the database
for HTTP Basic authentication.</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">ModuleIdentifier:</a></th><td>authnz_ldap_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">SourceFile:</a></th><td>mod_authnz_ldap.c</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.1 and later</td></tr></table>
<h3>Summary</h3>
<p>This module allows authentication front-ends such as
<code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> to authenticate users through
an ldap directory.</p>
<p><code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> supports the following features:</p>
<ul>
<li>Known to support the <a href="http://www.openldap.org/">OpenLDAP SDK</a> (both 1.x
and 2.x), <a href="http://developer.novell.com/ndk/cldap.htm">
Novell LDAP SDK</a> and the <a href="http://www.iplanet.com/downloads/developer/">iPlanet
(Netscape)</a> SDK.</li>
<li>Complex authorization policies can be implemented by
representing the policy with LDAP filters.</li>
<li>Uses extensive caching of LDAP operations via <a href="mod_ldap.html">mod_ldap</a>.</li>
<li>Support for LDAP over SSL (requires the Netscape SDK) or
TLS (requires the OpenLDAP 2.x SDK or Novell LDAP SDK).</li>
</ul>
<p>When using <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code>, this module is invoked
via the <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code>
directive with the <code>ldap</code> value.</p>
</div>
<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#contents">Contents</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#gcaveats">General caveats</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#operation">Operation</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#requiredirectives">The Require Directives</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#usingtls">Using TLS</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#usingssl">Using SSL</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#exposed">Exposing Login Information</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#activedirectory">Using Active Directory</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#frontpage">Using Microsoft
FrontPage with mod_authnz_ldap</a></li>
</ul><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#authldapauthorizeprefix">AuthLDAPAuthorizePrefix</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapbindauthoritative">AuthLDAPBindAuthoritative</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapbinddn">AuthLDAPBindDN</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapbindpassword">AuthLDAPBindPassword</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapcharsetconfig">AuthLDAPCharsetConfig</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapcompareasuser">AuthLDAPCompareAsUser</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapcomparednonserver">AuthLDAPCompareDNOnServer</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapdereferencealiases">AuthLDAPDereferenceAliases</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapgroupattribute">AuthLDAPGroupAttribute</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapgroupattributeisdn">AuthLDAPGroupAttributeIsDN</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapinitialbindasuser">AuthLDAPInitialBindAsUser</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapinitialbindpattern">AuthLDAPInitialBindPattern</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapmaxsubgroupdepth">AuthLDAPMaxSubGroupDepth</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapremoteuserattribute">AuthLDAPRemoteUserAttribute</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapremoteuserisdn">AuthLDAPRemoteUserIsDN</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapsearchasuser">AuthLDAPSearchAsUser</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapsubgroupattribute">AuthLDAPSubGroupAttribute</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapsubgroupclass">AuthLDAPSubGroupClass</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authldapurl">AuthLDAPUrl</a></li>
</ul>
<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_authnz_ldap">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_authnz_ldap">Report a bug</a></li></ul><h3>See also</h3>
<ul class="seealso">
<li><code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code></li>
<li><code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code></li>
<li><code class="module"><a href="../mod/mod_authz_user.html">mod_authz_user</a></code></li>
<li><code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code></li>
<li><a href="#comments_section">Comments</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="contents" id="contents">Contents</a></h2>
<ul>
<li> <a href="#gcaveats">General caveats</a> </li>
<li> <a href="#operation">Operation</a>
<ul>
<li><a href="#authenphase">The Authentication
Phase</a></li>
<li><a href="#authorphase">The Authorization
Phase</a></li>
</ul>
</li>
<li>
<a href="#requiredirectives">The Require Directives</a>
<ul>
<li><a href="#requser">Require ldap-user</a></li>
<li><a href="#reqgroup">Require ldap-group</a></li>
<li><a href="#reqdn">Require ldap-dn</a></li>
<li><a href="#reqattribute">Require ldap-attribute</a></li>
<li><a href="#reqfilter">Require ldap-filter</a></li>
</ul>
</li>
<li><a href="#examples">Examples</a></li>
<li><a href="#usingtls">Using TLS</a></li>
<li><a href="#usingssl">Using SSL</a></li>
<li><a href="#exposed">Exposing Login Information</a></li>
<li><a href="#activedirectory">Using Active Directory</a></li>
<li>
<a href="#frontpage">Using Microsoft FrontPage with
<code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code></a>
<ul>
<li><a href="#howitworks">How It Works</a></li>
<li><a href="#fpcaveats">Caveats</a></li>
</ul>
</li>
</ul>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="gcaveats" id="gcaveats">General caveats</a></h2>
<p> This module caches authentication and authorization results based
on the configuration of <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code>. Changes
made to the backing LDAP server will not be immediately reflected on the
HTTP Server, including but not limited to user lockouts/revocations,
password changes, or changes to group memberships. Consult the directives
in <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code> for details of the cache tunables.
</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="operation" id="operation">Operation</a></h2>
<p>There are two phases in granting access to a user. The first
phase is authentication, in which the <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code>
authentication provider verifies that the user's credentials are valid.
This is also called the <em>search/bind</em> phase. The second phase is
authorization, in which <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> determines
if the authenticated user is allowed access to the resource in
question. This is also known as the <em>compare</em>
phase.</p>
<p><code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> registers both an authn_ldap authentication
provider and an authz_ldap authorization handler. The authn_ldap
authentication provider can be enabled through the
<code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> directive
using the <code>ldap</code> value. The authz_ldap handler extends the
<code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code> directive's authorization types
by adding <code>ldap-user</code>, <code>ldap-dn</code> and <code>ldap-group</code>
values.</p>
<h3><a name="authenphase" id="authenphase">The Authentication
Phase</a></h3>
<p>During the authentication phase, <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code>
searches for an entry in the directory that matches the username
that the HTTP client passes. If a single unique match is found,
then <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> attempts to bind to the
directory server using the DN of the entry plus the password
provided by the HTTP client. Because it does a search, then a
bind, it is often referred to as the search/bind phase. Here are
the steps taken during the search/bind phase.</p>
<ol>
<li>Generate a search filter by combining the attribute and
filter provided in the <code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> directive with
the username passed by the HTTP client.</li>
<li>Search the directory using the generated filter. If the
search does not return exactly one entry, deny or decline
access.</li>
<li>Fetch the distinguished name of the entry retrieved from
the search and attempt to bind to the LDAP server using that
DN and the password passed by the HTTP client. If the bind is
unsuccessful, deny or decline access.</li>
</ol>
<p>The following directives are used during the search/bind
phase</p>
<table>
<tr>
<td><code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code></td>
<td>Specifies the LDAP server, the
base DN, the attribute to use in the search, as well as the
extra search filter to use.</td>
</tr>
<tr>
<td><code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code></td>
<td>An optional DN to bind with
during the search phase.</td>
</tr>
<tr>
<td><code class="directive"><a href="#authldapbindpassword">AuthLDAPBindPassword</a></code></td>
<td>An optional password to bind
with during the search phase.</td>
</tr>
</table>
<h3><a name="authorphase" id="authorphase">The Authorization Phase</a></h3>
<p>During the authorization phase, <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code>
attempts to determine if the user is authorized to access the
resource. Many of these checks require
<code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> to do a compare operation on the
LDAP server. This is why this phase is often referred to as the
compare phase. <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> accepts the
following <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code>
directives to determine if the credentials are acceptable:</p>
<ul>
<li>Grant access if there is a <a href="#reqgroup"><code>Require ldap-user</code></a> directive, and the
username in the directive matches the username passed by the
client.</li>
<li>Grant access if there is a <a href="#reqdn"><code>Require
ldap-dn</code></a> directive, and the DN in the directive matches
the DN fetched from the LDAP directory.</li>
<li>Grant access if there is a <a href="#reqgroup"><code>Require ldap-group</code></a> directive, and
the DN fetched from the LDAP directory (or the username
passed by the client) occurs in the LDAP group or, potentially, in
one of its sub-groups.</li>
<li>Grant access if there is a <a href="#reqattribute">
<code>Require ldap-attribute</code></a>
directive, and the attribute fetched from the LDAP directory
matches the given value.</li>
<li>Grant access if there is a <a href="#reqfilter">
<code>Require ldap-filter</code></a>
directive, and the search filter successfully finds a single user
object that matches the dn of the authenticated user.</li>
<li>otherwise, deny or decline access</li>
</ul>
<p>Other <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code> values may also
be used which may require loading additional authorization modules.</p>
<ul>
<li>Grant access to all successfully authenticated users if
there is a <a href="#requser"><code>Require valid-user</code></a>
directive. (requires <code class="module"><a href="../mod/mod_authz_user.html">mod_authz_user</a></code>)</li>
<li>Grant access if there is a <a href="#reqgroup"><code>Require group</code></a> directive, and
<code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code> has been loaded with the
<code class="directive"><a href="../mod/mod_authz_groupfile.html#authgroupfile">AuthGroupFile</a></code>
directive set.</li>
<li>others...</li>
</ul>
<p><code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> uses the following directives during the
compare phase:</p>
<table>
<tr>
<td><code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> </td>
<td>The attribute specified in the
URL is used in compare operations for the <code>Require
ldap-user</code> operation.</td>
</tr>
<tr>
<td><code class="directive"><a href="#authldapcomparednonserver">AuthLDAPCompareDNOnServer</a></code></td>
<td>Determines the behavior of the
<code>Require ldap-dn</code> directive.</td>
</tr>
<tr>
<td><code class="directive"><a href="#authldapgroupattribute">AuthLDAPGroupAttribute</a></code></td>
<td>Determines the attribute to
use for comparisons in the <code>Require ldap-group</code>
directive.</td>
</tr>
<tr>
<td><code class="directive"><a href="#authldapgroupattributeisdn">AuthLDAPGroupAttributeIsDN</a></code></td>
<td>Specifies whether to use the
user DN or the username when doing comparisons for the
<code>Require ldap-group</code> directive.</td>
</tr>
<tr>
<td><code class="directive"><a href="#authldapmaxsubgroupdepth">AuthLDAPMaxSubGroupDepth</a></code></td>
<td>Determines the maximum depth of sub-groups that will be evaluated
during comparisons in the <code>Require ldap-group</code> directive.</td>
</tr>
<tr>
<td><code class="directive"><a href="#authldapsubgroupattribute">AuthLDAPSubGroupAttribute</a></code></td>
<td>Determines the attribute to use when obtaining sub-group members
of the current group during comparisons in the <code>Require ldap-group</code>
directive.</td>
</tr>
<tr>
<td><code class="directive"><a href="#authldapsubgroupclass">AuthLDAPSubGroupClass</a></code></td>
<td>Specifies the LDAP objectClass values used to identify if queried directory
objects really are group objects (as opposed to user objects) during the
<code>Require ldap-group</code> directive's sub-group processing.</td>
</tr>
</table>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="requiredirectives" id="requiredirectives">The Require Directives</a></h2>
<p>Apache's <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code>
directives are used during the authorization phase to ensure that
a user is allowed to access a resource. mod_authnz_ldap extends the
authorization types with <code>ldap-user</code>, <code>ldap-dn</code>,
<code>ldap-group</code>, <code>ldap-attribute</code> and
<code>ldap-filter</code>. Other authorization types may also be
used but may require that additional authorization modules be loaded.</p>
<p>Since v2.4.8, <a href="../expr.html">expressions</a> are supported
within the LDAP require directives.</p>
<h3><a name="requser" id="requser">Require ldap-user</a></h3>
<p>The <code>Require ldap-user</code> directive specifies what
usernames can access the resource. Once
<code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> has retrieved a unique DN from the
directory, it does an LDAP compare operation using the username
specified in the <code>Require ldap-user</code> to see if that username
is part of the just-fetched LDAP entry. Multiple users can be
granted access by putting multiple usernames on the line,
separated with spaces. If a username has a space in it, then it
must be surrounded with double quotes. Multiple users can also be
granted access by using multiple <code>Require ldap-user</code>
directives, with one user per line. For example, with a <code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> of
<code>ldap://ldap/o=Example?cn</code> (i.e., <code>cn</code> is
used for searches), the following Require directives could be used
to restrict access:</p>
<pre class="prettyprint lang-config">Require ldap-user "Barbara Jenson"
Require ldap-user "Fred User"
Require ldap-user "Joe Manager"</pre>
<p>Because of the way that <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> handles this
directive, Barbara Jenson could sign on as <em>Barbara
Jenson</em>, <em>Babs Jenson</em> or any other <code>cn</code> that
she has in her LDAP entry. Only the single <code>Require
ldap-user</code> line is needed to support all values of the attribute
in the user's entry.</p>
<p>If the <code>uid</code> attribute was used instead of the
<code>cn</code> attribute in the URL above, the above three lines
could be condensed to</p>
<pre class="prettyprint lang-config">Require ldap-user bjenson fuser jmanager</pre>
<h3><a name="reqgroup" id="reqgroup">Require ldap-group</a></h3>
<p>This directive specifies an LDAP group whose members are
allowed access. It takes the distinguished name of the LDAP
group. Note: Do not surround the group name with quotes.
For example, assume that the following entry existed in
the LDAP directory:</p>
<div class="example"><pre>dn: cn=Administrators, o=Example
objectClass: groupOfUniqueNames
uniqueMember: cn=Barbara Jenson, o=Example
uniqueMember: cn=Fred User, o=Example</pre></div>
<p>The following directive would grant access to both Fred and
Barbara:</p>
<pre class="prettyprint lang-config">Require ldap-group cn=Administrators, o=Example</pre>
<p>Members can also be found within sub-groups of a specified LDAP group
if <code class="directive"><a href="#authldapmaxsubgroupdepth">AuthLDAPMaxSubGroupDepth</a></code>
is set to a value greater than 0. For example, assume the following entries
exist in the LDAP directory:</p>
<div class="example"><pre>dn: cn=Employees, o=Example
objectClass: groupOfUniqueNames
uniqueMember: cn=Managers, o=Example
uniqueMember: cn=Administrators, o=Example
uniqueMember: cn=Users, o=Example
dn: cn=Managers, o=Example
objectClass: groupOfUniqueNames
uniqueMember: cn=Bob Ellis, o=Example
uniqueMember: cn=Tom Jackson, o=Example
dn: cn=Administrators, o=Example
objectClass: groupOfUniqueNames
uniqueMember: cn=Barbara Jenson, o=Example
uniqueMember: cn=Fred User, o=Example
dn: cn=Users, o=Example
objectClass: groupOfUniqueNames
uniqueMember: cn=Allan Jefferson, o=Example
uniqueMember: cn=Paul Tilley, o=Example
uniqueMember: cn=Temporary Employees, o=Example
dn: cn=Temporary Employees, o=Example
objectClass: groupOfUniqueNames
uniqueMember: cn=Jim Swenson, o=Example
uniqueMember: cn=Elliot Rhodes, o=Example</pre></div>
<p>The following directives would allow access for Bob Ellis, Tom Jackson,
Barbara Jenson, Fred User, Allan Jefferson, and Paul Tilley but would not
allow access for Jim Swenson, or Elliot Rhodes (since they are at a
sub-group depth of 2):</p>
<pre class="prettyprint lang-config">Require ldap-group cn=Employees, o=Example
AuthLDAPMaxSubGroupDepth 1</pre>
<p>Behavior of this directive is modified by the <code class="directive"><a href="#authldapgroupattribute">AuthLDAPGroupAttribute</a></code>, <code class="directive"><a href="#authldapgroupattributeisdn">AuthLDAPGroupAttributeIsDN</a></code>, <code class="directive"><a href="#authldapmaxsubgroupdepth">AuthLDAPMaxSubGroupDepth</a></code>, <code class="directive"><a href="#authldapsubgroupattribute">AuthLDAPSubGroupAttribute</a></code>, and <code class="directive"><a href="#authldapsubgroupclass">AuthLDAPSubGroupClass</a></code>
directives.</p>
<h3><a name="reqdn" id="reqdn">Require ldap-dn</a></h3>
<p>The <code>Require ldap-dn</code> directive allows the administrator
to grant access based on distinguished names. It specifies a DN
that must match for access to be granted. If the distinguished
name that was retrieved from the directory server matches the
distinguished name in the <code>Require ldap-dn</code>, then
authorization is granted. Note: do not surround the distinguished
name with quotes.</p>
<p>The following directive would grant access to a specific
DN:</p>
<pre class="prettyprint lang-config">Require ldap-dn cn=Barbara Jenson, o=Example</pre>
<p>Behavior of this directive is modified by the <code class="directive"><a href="#authldapcomparednonserver">AuthLDAPCompareDNOnServer</a></code>
directive.</p>
<h3><a name="reqattribute" id="reqattribute">Require ldap-attribute</a></h3>
<p>The <code>Require ldap-attribute</code> directive allows the
administrator to grant access based on attributes of the authenticated
user in the LDAP directory. If the attribute in the directory
matches the value given in the configuration, access is granted.</p>
<p>The following directive would grant access to anyone with
the attribute employeeType = active</p>
<pre class="prettyprint lang-config">Require ldap-attribute "employeeType=active"</pre>
<p>Multiple attribute/value pairs can be specified on the same line
separated by spaces or they can be specified in multiple
<code>Require ldap-attribute</code> directives. The effect of listing
multiple attribute/values pairs is an OR operation. Access will be
granted if any of the listed attribute values match the value of the
corresponding attribute in the user object. If the value of the
attribute contains a space, only the value must be within double quotes.</p>
<p>The following directive would grant access to anyone with
the city attribute equal to "San Jose" or status equal to "Active"</p>
<pre class="prettyprint lang-config">Require ldap-attribute city="San Jose" "status=active"</pre>
<h3><a name="reqfilter" id="reqfilter">Require ldap-filter</a></h3>
<p>The <code>Require ldap-filter</code> directive allows the
administrator to grant access based on a complex LDAP search filter.
If the dn returned by the filter search matches the authenticated user
dn, access is granted.</p>
<p>The following directive would grant access to anyone having a cell phone
and is in the marketing department</p>
<pre class="prettyprint lang-config">Require ldap-filter "&(cell=*)(department=marketing)"</pre>
<p>The difference between the <code>Require ldap-filter</code> directive and the
<code>Require ldap-attribute</code> directive is that <code>ldap-filter</code>
performs a search operation on the LDAP directory using the specified search
filter rather than a simple attribute comparison. If a simple attribute
comparison is all that is required, the comparison operation performed by
<code>ldap-attribute</code> will be faster than the search operation
used by <code>ldap-filter</code> especially within a large directory.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="examples" id="examples">Examples</a></h2>
<ul>
<li>
Grant access to anyone who exists in the LDAP directory,
using their UID for searches.
<pre class="prettyprint lang-config">AuthLDAPURL "ldap://ldap1.example.com:389/ou=People, o=Example?uid?sub?(objectClass=*)"
Require valid-user</pre>
</li>
<li>
The next example is the same as above; but with the fields
that have useful defaults omitted. Also, note the use of a
redundant LDAP server.
<pre class="prettyprint lang-config">AuthLDAPURL "ldap://ldap1.example.com ldap2.example.com/ou=People, o=Example"
Require valid-user</pre>
</li>
<li>
The next example is similar to the previous one, but it
uses the common name instead of the UID. Note that this
could be problematical if multiple people in the directory
share the same <code>cn</code>, because a search on <code>cn</code>
<strong>must</strong> return exactly one entry. That's why
this approach is not recommended: it's a better idea to
choose an attribute that is guaranteed unique in your
directory, such as <code>uid</code>.
<pre class="prettyprint lang-config">AuthLDAPURL "ldap://ldap.example.com/ou=People, o=Example?cn"
Require valid-user</pre>
</li>
<li>
Grant access to anybody in the Administrators group. The
users must authenticate using their UID.
<pre class="prettyprint lang-config">AuthLDAPURL ldap://ldap.example.com/o=Example?uid
Require ldap-group cn=Administrators, o=Example</pre>
</li>
<li>
Grant access to anybody in the group whose name matches the
hostname of the virtual host. In this example an
<a href="../expr.html">expression</a> is used to build the filter.
<pre class="prettyprint lang-config">AuthLDAPURL ldap://ldap.example.com/o=Example?uid
Require ldap-group cn=%{SERVER_NAME}, o=Example</pre>
</li>
<li>
The next example assumes that everyone at Example who
carries an alphanumeric pager will have an LDAP attribute
of <code>qpagePagerID</code>. The example will grant access
only to people (authenticated via their UID) who have
alphanumeric pagers:
<pre class="prettyprint lang-config">AuthLDAPURL ldap://ldap.example.com/o=Example?uid??(qpagePagerID=*)
Require valid-user</pre>
</li>
<li>
<p>The next example demonstrates the power of using filters
to accomplish complicated administrative requirements.
Without filters, it would have been necessary to create a
new LDAP group and ensure that the group's members remain
synchronized with the pager users. This becomes trivial
with filters. The goal is to grant access to anyone who has
a pager, plus grant access to Joe Manager, who doesn't
have a pager, but does need to access the same
resource:</p>
<pre class="prettyprint lang-config">AuthLDAPURL ldap://ldap.example.com/o=Example?uid??(|(qpagePagerID=*)(uid=jmanager))
Require valid-user</pre>
<p>This last may look confusing at first, so it helps to
evaluate what the search filter will look like based on who
connects, as shown below. If
Fred User connects as <code>fuser</code>, the filter would look
like</p>
<div class="example"><p><code>(&(|(qpagePagerID=*)(uid=jmanager))(uid=fuser))</code></p></div>
<p>The above search will only succeed if <em>fuser</em> has a
pager. When Joe Manager connects as <em>jmanager</em>, the
filter looks like</p>
<div class="example"><p><code>(&(|(qpagePagerID=*)(uid=jmanager))(uid=jmanager))</code></p></div>
<p>The above search will succeed whether <em>jmanager</em>
has a pager or not.</p>
</li>
</ul>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="usingtls" id="usingtls">Using TLS</a></h2>
<p>To use TLS, see the <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code> directives <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedclientcert">LDAPTrustedClientCert</a></code>, <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedglobalcert">LDAPTrustedGlobalCert</a></code> and <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedmode">LDAPTrustedMode</a></code>.</p>
<p>An optional second parameter can be added to the
<code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> to override
the default connection type set by <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedmode">LDAPTrustedMode</a></code>.
This will allow the connection established by an <em>ldap://</em> Url
to be upgraded to a secure connection on the same port.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="usingssl" id="usingssl">Using SSL</a></h2>
<p>To use SSL, see the <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code> directives <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedclientcert">LDAPTrustedClientCert</a></code>, <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedglobalcert">LDAPTrustedGlobalCert</a></code> and <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedmode">LDAPTrustedMode</a></code>.</p>
<p>To specify a secure LDAP server, use <em>ldaps://</em> in the
<code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code>
directive, instead of <em>ldap://</em>.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="exposed" id="exposed">Exposing Login Information</a></h2>
<p>when this module performs <em>authentication</em>, ldap attributes specified
in the <code class="directive"><a href="#authldapurl">authldapurl</a></code>
directive are placed in environment variables with the prefix "AUTHENTICATE_".</p>
<p>when this module performs <em>authorization</em>, ldap attributes specified
in the <code class="directive"><a href="#authldapurl">authldapurl</a></code>
directive are placed in environment variables with the prefix "AUTHORIZE_".</p>
<p>If the attribute field contains the username, common name
and telephone number of a user, a CGI program will have access to
this information without the need to make a second independent LDAP
query to gather this additional information.</p>
<p>This has the potential to dramatically simplify the coding and
configuration required in some web applications.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="activedirectory" id="activedirectory">Using Active Directory</a></h2>
<p>An Active Directory installation may support multiple domains at the
same time. To distinguish users between domains, an identifier called
a User Principle Name (UPN) can be added to a user's entry in the
directory. This UPN usually takes the form of the user's account
name, followed by the domain components of the particular domain,
for example <em>somebody@nz.example.com</em>.</p>
<p>You may wish to configure the <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code>
module to authenticate users present in any of the domains making up
the Active Directory forest. In this way both
<em>somebody@nz.example.com</em> and <em>someone@au.example.com</em>
can be authenticated using the same query at the same time.</p>
<p>To make this practical, Active Directory supports the concept of
a Global Catalog. This Global Catalog is a read only copy of selected
attributes of all the Active Directory servers within the Active
Directory forest. Querying the Global Catalog allows all the domains
to be queried in a single query, without the query spanning servers
over potentially slow links.</p>
<p>If enabled, the Global Catalog is an independent directory server
that runs on port 3268 (3269 for SSL). To search for a user, do a
subtree search for the attribute <em>userPrincipalName</em>, with
an empty search root, like so:</p>
<pre class="prettyprint lang-config">AuthLDAPBindDN apache@example.com
AuthLDAPBindPassword password
AuthLDAPURL ldap://10.0.0.1:3268/?userPrincipalName?sub</pre>
<p>Users will need to enter their User Principal Name as a login, in
the form <em>somebody@nz.example.com</em>.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="frontpage" id="frontpage">Using Microsoft
FrontPage with mod_authnz_ldap</a></h2>
<p>Normally, FrontPage uses FrontPage-web-specific user/group
files (i.e., the <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> and
<code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code> modules) to handle all
authentication. Unfortunately, it is not possible to just
change to LDAP authentication by adding the proper directives,
because it will break the <em>Permissions</em> forms in
the FrontPage client, which attempt to modify the standard
text-based authorization files.</p>
<p>Once a FrontPage web has been created, adding LDAP
authentication to it is a matter of adding the following
directives to <em>every</em> <code>.htaccess</code> file
that gets created in the web</p>
<pre class="prettyprint lang-config">AuthLDAPURL "the url"
AuthGroupFile "mygroupfile"
Require group "mygroupfile"</pre>
<h3><a name="howitworks" id="howitworks">How It Works</a></h3>
<p>FrontPage restricts access to a web by adding the <code>Require
valid-user</code> directive to the <code>.htaccess</code>
files. The <code>Require valid-user</code> directive will succeed for
any user who is valid <em>as far as LDAP is
concerned</em>. This means that anybody who has an entry in
the LDAP directory is considered a valid user, whereas FrontPage
considers only those people in the local user file to be
valid. By substituting the ldap-group with group file authorization,
Apache is allowed to consult the local user file (which is managed by
FrontPage) - instead of LDAP - when handling authorizing the user.</p>
<p>Once directives have been added as specified above,
FrontPage users will be able to perform all management
operations from the FrontPage client.</p>
<h3><a name="fpcaveats" id="fpcaveats">Caveats</a></h3>
<ul>
<li>When choosing the LDAP URL, the attribute to use for
authentication should be something that will also be valid
for putting into a <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> user file.
The user ID is ideal for this.</li>
<li>When adding users via FrontPage, FrontPage administrators
should choose usernames that already exist in the LDAP
directory (for obvious reasons). Also, the password that the
administrator enters into the form is ignored, since Apache
will actually be authenticating against the password in the
LDAP database, and not against the password in the local user
file. This could cause confusion for web administrators.</li>
<li>Apache must be compiled with <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code>,
<code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> and
<code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code> in order to
use FrontPage support. This is because Apache will still use
the <code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code> group file for determine
the extent of a user's access to the FrontPage web.</li>
<li>The directives must be put in the <code>.htaccess</code>
files. Attempting to put them inside <code class="directive"><a href="../mod/core.html#location"><Location></a></code> or <code class="directive"><a href="../mod/core.html#directory"><Directory></a></code> directives won't work. This
is because <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> has to be able to grab
the <code class="directive"><a href="../mod/mod_authz_groupfile.html#authgroupfile">AuthGroupFile</a></code>
directive that is found in FrontPage <code>.htaccess</code>
files so that it knows where to look for the valid user list. If
the <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> directives aren't in the same
<code>.htaccess</code> file as the FrontPage directives, then
the hack won't work, because <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will
never get a chance to process the <code>.htaccess</code> file,
and won't be able to find the FrontPage-managed user file.</li>
</ul>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="AuthLDAPAuthorizePrefix" id="AuthLDAPAuthorizePrefix">AuthLDAPAuthorizePrefix</a> <a name="authldapauthorizeprefix" id="authldapauthorizeprefix">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specifies the prefix for environment variables set during
authorization</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPAuthorizePrefix <em>prefix</em></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPAuthorizePrefix AUTHORIZE_</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.6 and later</td></tr>
</table>
<p>This directive allows you to override the prefix used for environment
variables set during LDAP authorization. If <em>AUTHENTICATE_</em> is
specified, consumers of these environment variables see the same information
whether LDAP has performed authentication, authorization, or both.</p>
<div class="note"><h3>Note</h3>
No authorization variables are set when a user is authorized on the basis of
<code>Require valid-user</code>.
</div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="AuthLDAPBindAuthoritative" id="AuthLDAPBindAuthoritative">AuthLDAPBindAuthoritative</a> <a name="authldapbindauthoritative" id="authldapbindauthoritative">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines if other authentication providers are used when a user can be mapped to a DN but the server cannot successfully bind with the user's credentials.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPBindAuthoritative off|on</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPBindAuthoritative on</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr>
</table>
<p>By default, subsequent authentication providers are only queried if a
user cannot be mapped to a DN, but not if the user can be mapped to a DN and their
password cannot be verified with an LDAP bind.
If <code class="directive">AuthLDAPBindAuthoritative</code>
is set to <em>off</em>, other configured authentication modules will have
a chance to validate the user if the LDAP bind (with the current user's credentials)
fails for any reason.</p>
<p> This allows users present in both LDAP and
<code class="directive"><a href="../mod/mod_authn_file.html#authuserfile">AuthUserFile</a></code> to authenticate
when the LDAP server is available but the user's account is locked or password
is otherwise unusable.</p>
<h3>See also</h3>
<ul>
<li><code class="directive"><a href="../mod/mod_authn_file.html#authuserfile">AuthUserFile</a></code></li>
<li><code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code></li>
</ul>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="AuthLDAPBindDN" id="AuthLDAPBindDN">AuthLDAPBindDN</a> <a name="authldapbinddn" id="authldapbinddn">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Optional DN to use in binding to the LDAP server</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPBindDN <em>distinguished-name</em></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr>
</table>
<p>An optional DN used to bind to the server when searching for
entries. If not provided, <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will use
an anonymous bind.</p>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="AuthLDAPBindPassword" id="AuthLDAPBindPassword">AuthLDAPBindPassword</a> <a name="authldapbindpassword" id="authldapbindpassword">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Password used in conjunction with the bind DN</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPBindPassword <em>password</em></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td><em>exec:</em> was added in 2.4.5.</td></tr>
</table>
<p>A bind password to use in conjunction with the bind DN. Note
that the bind password is probably sensitive data, and should be
properly protected. You should only use the <code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code> and <code class="directive">AuthLDAPBindPassword</code> if you
absolutely need them to search the directory.</p>
<p>If the value begins with exec: the resulting command will be
executed and the first line returned to standard output by the
program will be used as the password.</p>
<pre class="prettyprint lang-config">#Password used as-is
AuthLDAPBindPassword secret
#Run /path/to/program to get my password
AuthLDAPBindPassword exec:/path/to/program
#Run /path/to/otherProgram and provide arguments
AuthLDAPBindPassword "exec:/path/to/otherProgram argument1"</pre>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="AuthLDAPCharsetConfig" id="AuthLDAPCharsetConfig">AuthLDAPCharsetConfig</a> <a name="authldapcharsetconfig" id="authldapcharsetconfig">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Language to charset conversion configuration file</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPCharsetConfig <em>file-path</em></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr>
</table>
<p>The <code class="directive">AuthLDAPCharsetConfig</code> directive sets the location
of the language to charset conversion configuration file. <var>File-path</var> is relative
to the <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>. This file specifies
the list of language extensions to character sets.
Most administrators use the provided <code>charset.conv</code>
file, which associates common language extensions to character sets.</p>
<p>The file contains lines in the following format:</p>
<div class="example"><p><code>
<var>Language-Extension</var> <var>charset</var> [<var>Language-String</var>] ...
</code></p></div>
<p>The case of the extension does not matter. Blank lines, and lines
beginning with a hash character (<code>#</code>) are ignored.</p>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="AuthLDAPCompareAsUser" id="AuthLDAPCompareAsUser">AuthLDAPCompareAsUser</a> <a name="authldapcompareasuser" id="authldapcompareasuser">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use the authenticated user's credentials to perform authorization comparisons</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPCompareAsUser on|off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPCompareAsUser off</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.6 and later</td></tr>
</table>
<p>When set, and <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> has authenticated the
user, LDAP comparisons for authorization use the queried distinguished name (DN)
and HTTP basic authentication password of the authenticated user instead of
the servers configured credentials.</p>
<p> The <em>ldap-attribute</em>, <em>ldap-user</em>, and <em>ldap-group</em> (single-level only)
authorization checks use comparisons.</p>
<p>This directive only has effect on the comparisons performed during
nested group processing when <code class="directive"><a href="#authldapsearchasuser">
AuthLDAPSearchAsUser</a></code> is also enabled.</p>
<p> This directive should only be used when your LDAP server doesn't
accept anonymous comparisons and you cannot use a dedicated
<code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code>.
</p>
<h3>See also</h3>
<ul>
<li><code class="directive"><a href="#authldapinitialbindasuser">AuthLDAPInitialBindAsUser</a></code></li>
<li><code class="directive"><a href="#authldapsearchasuser">AuthLDAPSearchAsUser</a></code></li>
</ul>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="AuthLDAPCompareDNOnServer" id="AuthLDAPCompareDNOnServer">AuthLDAPCompareDNOnServer</a> <a name="authldapcomparednonserver" id="authldapcomparednonserver">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use the LDAP server to compare the DNs</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPCompareDNOnServer on|off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPCompareDNOnServer on</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr>
</table>
<p>When set, <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will use the LDAP
server to compare the DNs. This is the only foolproof way to
compare DNs. <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will search the
directory for the DN specified with the <a href="#reqdn"><code>Require dn</code></a> directive, then,
retrieve the DN and compare it with the DN retrieved from the user
entry. If this directive is not set,
<code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> simply does a string comparison. It
is possible to get false negatives with this approach, but it is
much faster. Note the <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code> cache can speed up
DN comparison in most situations.</p>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="AuthLDAPDereferenceAliases" id="AuthLDAPDereferenceAliases">AuthLDAPDereferenceAliases</a> <a name="authldapdereferencealiases" id="authldapdereferencealiases">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>When will the module de-reference aliases</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPDereferenceAliases never|searching|finding|always</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPDereferenceAliases always</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr>
</table>
<p>This directive specifies when <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will
de-reference aliases during LDAP operations. The default is
<code>always</code>.</p>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="AuthLDAPGroupAttribute" id="AuthLDAPGroupAttribute">AuthLDAPGroupAttribute</a> <a name="authldapgroupattribute" id="authldapgroupattribute">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>LDAP attributes used to identify the user members of
groups.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPGroupAttribute <em>attribute</em></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPGroupAttribute member uniquemember</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr>
</table>
<p>This directive specifies which LDAP attributes are used to
check for user members within groups. Multiple attributes can be used
by specifying this directive multiple times. If not specified,