1 .TH SLAPD.CONF 5 "RELEASEDATE" "OpenLDAP LDVERSION"
2 .\" Copyright 1998-2007 The OpenLDAP Foundation All Rights Reserved.
3 .\" Copying restrictions apply. See COPYRIGHT/LICENSE.
6 slapd.conf \- configuration file for slapd, the stand-alone LDAP daemon
12 contains configuration information for the
14 daemon. This configuration file is also used by the
16 replication daemon and by the SLAPD tools
28 file consists of a series of global configuration options that apply to
30 as a whole (including all backends), followed by zero or more database
31 backend definitions that contain information specific to a backend
33 The configuration options are case-insensitive;
34 their value, on a case by case basis, may be case-sensitive.
41 # comment - these options apply to every database
42 <global configuration options>
43 # first database definition & configuration options
44 database <backend 1 type>
45 <configuration options specific to backend 1>
46 # subsequent database definitions & configuration options
50 As many backend-specific sections as desired may be included. Global
51 options can be overridden in a backend (for options that appear more
52 than once, the last appearance in the
56 If a line begins with white space, it is considered a continuation
57 of the previous line. No physical line should be over 2000 bytes
60 Blank lines and comment lines beginning with
61 a `#' character are ignored. Note: continuation lines are unwrapped
62 before comment processing is applied.
64 Arguments on configuration lines are separated by white space. If an
65 argument contains white space, the argument should be enclosed in
66 double quotes. If an argument contains a double quote (`"') or a
67 backslash character (`\\'), the character should be preceded by a
70 The specific configuration options available are discussed below in the
71 Global Configuration Options, General Backend Options, and General Database
72 Options. Backend-specific options are discussed in the
74 manual pages. Refer to the "OpenLDAP Administrator's Guide" for more
75 details on the slapd configuration file.
76 .SH GLOBAL CONFIGURATION OPTIONS
77 Options described in this section apply to all backends, unless specifically
78 overridden in a backend definition. Arguments that should be replaced by
79 actual text are shown in brackets <>.
81 .B access to <what> "[ by <who> <access> <control> ]+"
82 Grant access (specified by <access>) to a set of entries and/or
83 attributes (specified by <what>) by one or more requestors (specified
85 If no access controls are present, the default policy
86 allows anyone and everyone to read anything but restricts
87 updates to rootdn. (e.g., "access to * by * read").
88 The rootdn can always read and write EVERYTHING!
91 and the "OpenLDAP's Administrator's Guide" for details.
94 Specify a set of features (separated by white space) to
97 allows acceptance of LDAPv2 bind requests. Note that
99 does not truly implement LDAPv2 (RFC 1777), now Historic (RFC 3494).
101 allows anonymous bind when credentials are not empty (e.g.
104 allows unauthenticated (anonymous) bind when DN is not empty.
106 allows unauthenticated (anonymous) update operations to be processed
107 (subject to access controls and other administrative limits).
109 allows unauthenticated (anonymous) proxy authorization control to be processed
110 (subject to access controls, authorization and other administrative limits).
112 .B argsfile <filename>
113 The ( absolute ) name of a file that will hold the
115 server's command line options
116 if started without the debugging command line option.
118 .B attributeoptions [option-name]...
119 Define tagging attribute options or option tag/range prefixes.
120 Options must not end with `-', prefixes must end with `-'.
121 The `lang-' prefix is predefined.
124 directive, `lang-' will no longer be defined and you must specify it
125 explicitly if you want it defined.
127 An attribute description with a tagging option is a subtype of that
128 attribute description without the option.
129 Except for that, options defined this way have no special semantics.
130 Prefixes defined this way work like the `lang-' options:
131 They define a prefix for tagging options starting with the prefix.
132 That is, if you define the prefix `x-foo-', you can use the option
134 Furthermore, in a search or compare, a prefix or range name (with
135 a trailing `-') matches all options starting with that name, as well
136 as the option with the range name sans the trailing `-'.
137 That is, `x-foo-bar-' matches `x-foo-bar' and `x-foo-bar-baz'.
139 RFC 4520 reserves options beginning with `x-' for private experiments.
140 Other options should be registered with IANA, see RFC 4520 section 3.5.
141 OpenLDAP also has the `binary' option built in, but this is a transfer
142 option, not a tagging option.
145 .B attributetype "(\ <oid>\
147 [DESC\ <description>]\
156 [NO\-USER\-MODIFICATION]\
157 [USAGE\ <attributeUsage>]\ )"
159 Specify an attribute type using the LDAPv3 syntax defined in RFC 4512.
160 The slapd parser extends the RFC 4512 definition by allowing string
161 forms as well as numeric OIDs to be used for the attribute OID and
162 attribute syntax OID.
168 .B authz-policy <policy>
169 Used to specify which rules to use for Proxy Authorization. Proxy
170 authorization allows a client to authenticate to the server using one
171 user's credentials, but specify a different identity to use for authorization
172 and access control purposes. It essentially allows user A to login as user
173 B, using user A's password.
176 flag disables proxy authorization. This is the default setting.
179 flag will use rules in the
181 attribute of the authorization DN.
184 flag will use rules in the
186 attribute of the authentication DN.
189 flag, an alias for the deprecated value of
191 will allow any of the above, whatever succeeds first (checked in
197 flag requires both authorizations to succeed.
200 The rules are mechanisms to specify which identities are allowed
201 to perform proxy authorization.
204 attribute in an entry specifies which other users
205 are allowed to proxy login to this entry. The
208 an entry specifies which other users this user can authorize as. Use of
211 abused if users are allowed to write arbitrary values to this attribute.
214 attribute must be protected with ACLs such that
215 only privileged users can modify it.
222 or a set of identities; it can take five forms:
225 .B ldap:///<base>??[<scope>]?<filter>
228 .B dn[.<dnstyle>]:<pattern>
231 .B u[<mech>[<realm>]]:<pattern>
234 .B group[/objectClass[/attributeType]]:<pattern>
241 .B <dnstyle>:={exact|onelevel|children|subtree|regex}
244 The first form is a valid LDAP
252 portions must be absent, so that the search occurs locally on either
258 with the optional style modifiers
264 for exact, onelevel, children and subtree matches, which cause
266 to be normalized according to the DN normalization rules, or the special
268 style, which causes the
270 to be treated as a POSIX (''extended'') regular expression, as
277 means any non-anonymous DN.
278 The third form is a SASL
280 with the optional fields
284 that allow to specify a SASL
286 and eventually a SASL
288 for those mechanisms that support one.
289 The need to allow the specification of a mechanism is still debated,
290 and users are strongly discouraged to rely on this possibility.
291 The fourth form is a group specification, consisting of the keyword
293 optionally followed by the specification of the group
299 is searched with base scope, and in case of match, the values of the
302 are searched for the asserted DN.
303 For backwards compatibility, if no identity type is provided, i.e. only
307 is assumed; as a consequence,
309 is subjected to DN normalization.
310 Since the interpretation of
314 can impact security, users are strongly encouraged
315 to explicitly set the type of identity specification that is being used.
316 A subset of these rules can be used as third arg in the
318 statement (see below); significantly, the
325 .B authz-regexp <match> <replace>
326 Used by the authentication framework to convert simple user names,
327 such as provided by SASL subsystem, to an LDAP DN used for
328 authorization purposes. Note that the resultant DN need not refer
329 to an existing entry to be considered valid. When an authorization
330 request is received from the SASL subsystem, the SASL
335 are taken, when available, and combined into a name of the form
339 .B UID=<username>[[,CN=<realm>],CN=<mechanism>],CN=auth
342 This name is then compared against the
344 POSIX (''extended'') regular expression, and if the match is successful,
345 the name is replaced with the
347 string. If there are wildcard strings in the
349 regular expression that are enclosed in parenthesis, e.g.
355 then the portion of the name that matched the wildcard will be stored
356 in the numbered placeholder variable $1. If there are other wildcard strings
357 in parenthesis, the matching strings will be in $2, $3, etc. up to $9. The
358 placeholders can then be used in the
363 .B UID=$1,OU=Accounts,DC=example,DC=com
366 The replaced name can be either a DN, i.e. a string prefixed by "dn:",
368 If the latter, the server will use the URI to search its own database(s)
369 and, if the search returns exactly one entry, the name is
370 replaced by the DN of that entry. The LDAP URI must have no
371 hostport, attrs, or extensions components, but the filter is mandatory,
375 .B ldap:///OU=Accounts,DC=example,DC=com??one?(UID=$1)
378 The protocol portion of the URI must be strictly
380 Note that this search is subject to access controls. Specifically,
381 the authentication identity must have "auth" access in the subject.
385 options can be given in the configuration file to allow for multiple matching
386 and replacement patterns. The matching patterns are checked in the order they
387 appear in the file, stopping at the first successful match.
390 .\"Because the plus sign + is a character recognized by the regular expression engine,
391 .\"and it will appear in names that include a REALM, be careful to escape the
392 .\"plus sign with a backslash \\+ to remove the character's special meaning.
395 .B concurrency <integer>
396 Specify a desired level of concurrency. Provided to the underlying
397 thread system as a hint. The default is not to provide any hint.
399 .B conn_max_pending <integer>
400 Specify the maximum number of pending requests for an anonymous session.
401 If requests are submitted faster than the server can process them, they
402 will be queued up to this limit. If the limit is exceeded, the session
403 is closed. The default is 100.
405 .B conn_max_pending_auth <integer>
406 Specify the maximum number of pending requests for an authenticated session.
409 .B defaultsearchbase <dn>
410 Specify a default search base to use when client submits a
411 non-base search request with an empty base DN.
412 Base scoped search requests with an empty base DN are not affected.
414 .B disallow <features>
415 Specify a set of features (separated by white space) to
416 disallow (default none).
418 disables acceptance of anonymous bind requests. Note that this setting
419 does not prohibit anonymous directory access (See "require authc").
421 disables simple (bind) authentication.
423 disables forcing session to anonymous status (see also
425 upon StartTLS operation receipt.
427 disallows the StartTLS operation if authenticated (see also
431 .B ditcontentrule "(\ <oid>\
433 [DESC\ <description>]\
440 Specify an DIT Content Rule using the LDAPv3 syntax defined in RFC 4512.
441 The slapd parser extends the RFC 4512 definition by allowing string
442 forms as well as numeric OIDs to be used for the attribute OID and
443 attribute syntax OID.
449 .B gentlehup { on | off }
450 A SIGHUP signal will only cause a 'gentle' shutdown-attempt:
452 will stop listening for new connections, but will not close the
453 connections to the current clients. Future write operations return
454 unwilling-to-perform, though. Slapd terminates when all clients
455 have closed their connections (if they ever do), or \- as before \-
456 if it receives a SIGTERM signal. This can be useful if you wish to
457 terminate the server and start a new
460 .B with another database,
461 without disrupting the currently active clients.
462 The default is off. You may wish to use
464 along with this option.
466 .B idletimeout <integer>
467 Specify the number of seconds to wait before forcibly closing
468 an idle client connection. A idletimeout of 0 disables this
469 feature. The default is 0.
471 .B include <filename>
472 Read additional configuration information from the given file before
473 continuing with the next line of the current file.
475 .B index_substr_if_minlen <integer>
476 Specify the minimum length for subinitial and subfinal indices. An
477 attribute value must have at least this many characters in order to be
478 processed by the indexing functions. The default is 2.
480 .B index_substr_if_maxlen <integer>
481 Specify the maximum length for subinitial and subfinal indices. Only
482 this many characters of an attribute value will be processed by the
483 indexing functions; any excess characters are ignored. The default is 4.
485 .B index_substr_any_len <integer>
486 Specify the length used for subany indices. An attribute value must have
487 at least this many characters in order to be processed. Attribute values
488 longer than this length will be processed in segments of this length. The
489 default is 4. The subany index will also be used in subinitial and
490 subfinal index lookups when the filter string is longer than the
491 .I index_substr_if_maxlen
494 .B index_substr_any_step <integer>
495 Specify the steps used in subany index lookups. This value sets the offset
496 for the segments of a filter string that are processed for a subany index
497 lookup. The default is 2. For example, with the default values, a search
498 using this filter "cn=*abcdefgh*" would generate index lookups for
499 "abcd", "cdef", and "efgh".
502 Specifies the Security Strength Factor (SSF) to be given local LDAP sessions,
503 such as those to the ldapi:// listener. For a description of SSF values,
507 option description. The default is 71.
509 .B logfile <filename>
510 Specify a file for recording debug log messages. By default these messages
511 only go to stderr and are not recorded anywhere else. Specifying a logfile
512 copies messages to both stderr and the logfile.
514 .B loglevel <integer> [...]
515 Specify the level at which debugging statements and operation
516 statistics should be syslogged (currently logged to the
518 LOG_LOCAL4 facility).
519 They must be considered subsystems rather than increasingly verbose
521 Some messages with higher priority are logged regardless
522 of the configured loglevel as soon as some logging is configured,
523 otherwise anything is logged at all.
524 Log levels are additive, and available levels are:
535 debug packet handling
539 heavy trace debugging (function args)
543 connection management
547 print out packets sent and received
551 search filter processing
555 configuration file processing
559 access control list processing
563 stats log connections/operations/results
567 stats log entries sent
571 print communication with shell backends
583 \"data indexing (unused)
591 only messages that get logged whatever log level is set
594 The desired log level can be input as a single integer that combines
595 the (ORed) desired levels, both in decimal or in hexadecimal notation,
596 as a list of integers (that are ORed internally),
597 or as a list of the names that are shown between brackets, such that
610 can be used as a shortcut to enable logging at all levels (equivalent to -1).
613 or the equivalent integer representation, causes those messages
614 that are logged regardless of the configured loglevel to be logged.
615 In fact, if no loglevel (or a 0 level) is defined, no logging occurs,
618 level is required to have high priority messages logged.
621 .B moduleload <filename>
622 Specify the name of a dynamically loadable module to load. The filename
623 may be an absolute path name or a simple filename. Non-absolute names
624 are searched for in the directories specified by the
626 option. This option and the
628 option are only usable if slapd was compiled with --enable-modules.
630 .B modulepath <pathspec>
631 Specify a list of directories to search for loadable modules. Typically
632 the path is colon-separated but this depends on the operating system.
635 .B objectclass "(\ <oid>\
637 [DESC\ <description>]\
640 [{ ABSTRACT | STRUCTURAL | AUXILIARY }]\
641 [MUST\ <oids>] [MAY\ <oids>] )"
643 Specify an objectclass using the LDAPv3 syntax defined in RFC 4512.
644 The slapd parser extends the RFC 4512 definition by allowing string
645 forms as well as numeric OIDs to be used for the object class OID.
649 description.) Object classes are "STRUCTURAL" by default.
652 .B objectidentifier <name> "{ <oid> | <name>[:<suffix>] }"
653 Define a string name that equates to the given OID. The string can be used
654 in place of the numeric OID in objectclass and attribute definitions. The
655 name can also be used with a suffix of the form ":xx" in which case the
656 value "oid.xx" will be used.
658 .B password-hash <hash> [<hash>...]
659 This option configures one or more hashes to be used in generation of user
660 passwords stored in the userPassword attribute during processing of
661 LDAP Password Modify Extended Operations (RFC 3062).
662 The <hash> must be one of
676 use the SHA-1 algorithm (FIPS 160-1), the latter with a seed.
681 use the MD5 algorithm (RFC 1321), the latter with a seed.
688 indicates that the new password should be
689 added to userPassword as clear text.
691 Note that this option does not alter the normal user applications
692 handling of userPassword during LDAP Add, Modify, or other LDAP operations.
694 .B password\-crypt\-salt\-format <format>
695 Specify the format of the salt passed to
697 when generating {CRYPT} passwords (see
699 during processing of LDAP Password Modify Extended Operations (RFC 3062).
701 This string needs to be in
703 format and may include one (and only one) %s conversion.
704 This conversion will be substituted with a string of random
705 characters from [A\-Za\-z0\-9./]. For example, "%.2s"
706 provides a two character salt and "$1$%.8s" tells some
707 versions of crypt(3) to use an MD5 algorithm and provides
708 8 random characters of salt. The default is "%s", which
709 provides 31 characters of salt.
711 .B pidfile <filename>
712 The ( absolute ) name of a file that will hold the
714 server's process ID ( see
716 ) if started without the debugging command line option.
719 Specify the referral to pass back when
721 cannot find a local database to handle a request.
722 If specified multiple times, each url is provided.
725 The ( absolute ) name of a file that will hold the
727 server's command line options
728 if started without the debugging command line option.
729 If it appears after a
731 directive, the args file is specific to the
733 instance that handles that replication log.
736 The ( absolute ) name of a file that will hold the
738 server's process ID ( see
740 ) if started without the debugging command line option.
741 If it appears after a
743 directive, the pid file is specific to the
745 instance that handles that replication log.
747 .B replicationinterval
748 The number of seconds
750 waits before checking the replogfile for changes.
751 If it appears after a
753 directive, the replication interval is specific to the
755 instance that handles that replication log.
757 .B require <conditions>
758 Specify a set of conditions (separated by white space) to
759 require (default none).
760 The directive may be specified globally and/or per-database;
761 databases inherit global conditions, so per-database specifications
764 requires bind operation prior to directory operations.
766 requires session to be using LDAP version 3.
768 requires authentication prior to directory operations.
770 requires SASL authentication prior to directory operations.
772 requires strong authentication prior to directory operations.
773 The strong keyword allows protected "simple" authentication
774 as well as SASL authentication.
776 may be used to require no conditions (useful to clear out globally
777 set conditions within a particular database); it must occur first
778 in the list of conditions.
780 .B reverse-lookup on | off
781 Enable/disable client name unverified reverse lookup (default is
783 if compiled with --enable-rlookups).
786 Specify the name of an LDIF(5) file containing user defined attributes
787 for the root DSE. These attributes are returned in addition to the
788 attributes normally produced by slapd.
791 Used to specify the fully qualified domain name used for SASL processing.
793 .B sasl-realm <realm>
794 Specify SASL realm. Default is empty.
796 .B sasl-secprops <properties>
797 Used to specify Cyrus SASL security properties.
800 flag (without any other properties) causes the flag properties
801 default, "noanonymous,noplain", to be cleared.
804 flag disables mechanisms susceptible to simple passive attacks.
807 flag disables mechanisms susceptible to active attacks.
810 flag disables mechanisms susceptible to passive dictionary attacks.
813 flag disables mechanisms which support anonymous login.
816 flag require forward secrecy between sessions.
819 require mechanisms which pass client credentials (and allow
820 mechanisms which can pass credentials to do so).
823 property specifies the minimum acceptable
824 .I security strength factor
825 as an integer approximate to effective key length used for
826 encryption. 0 (zero) implies no protection, 1 implies integrity
827 protection only, 56 allows DES or other weak ciphers, 112
828 allows triple DES and other strong ciphers, 128 allows RC4,
829 Blowfish and other modern strong ciphers. The default is 0.
832 property specifies the maximum acceptable
833 .I security strength factor
834 as an integer (see minssf description). The default is INT_MAX.
837 property specifies the maximum security layer receive buffer
838 size allowed. 0 disables security layers. The default is 65536.
841 Specify the distinguished name for the subschema subentry that
842 controls the entries on this server. The default is "cn=Subschema".
844 .B security <factors>
845 Specify a set of security strength factors (separated by white space)
849 option for a description of security strength factors).
850 The directive may be specified globally and/or per-database.
852 specifies the overall security strength factor.
854 specifies the transport security strength factor.
856 specifies the TLS security strength factor.
858 specifies the SASL security strength factor.
860 specifies the overall security strength factor to require for
862 .B update_transport=<n>
863 specifies the transport security strength factor to require for
866 specifies the TLS security strength factor to require for
869 specifies the SASL security strength factor to require for
872 specifies the security strength factor required for
874 username/password authentication.
877 factor is measure of security provided by the underlying transport,
878 e.g. ldapi:// (and eventually IPSEC). It is not normally used.
880 .B serverID <integer> [<URL>]
881 Specify an integer ID from 0 to 4095 for this server. These IDs are
882 required when using multimaster replication and each master must have a
883 unique ID. If the URL is provided, this directive may be specified
884 multiple times, providing a complete list of participating servers
885 and their IDs. The fully qualified hostname of each server should be
886 used in the supplied URLs. The IDs are used in the "replica id" field
887 of all CSNs generated by the specified server. The default value is zero.
894 .B sizelimit {<integer>|unlimited}
896 .B sizelimit size[.{soft|hard|unchecked}]=<integer> [...]
897 Specify the maximum number of entries to return from a search operation.
898 The default size limit is 500.
901 to specify no limits.
902 The second format allows a fine grain setting of the size limits.
903 Extra args can be added on the same line.
906 for an explanation of the different flags.
908 .B sockbuf_max_incoming <integer>
909 Specify the maximum incoming LDAP PDU size for anonymous sessions.
910 The default is 262143.
912 .B sockbuf_max_incoming_auth <integer>
913 Specify the maximum incoming LDAP PDU size for authenticated sessions.
914 The default is 4194303.
917 Specify the maximum size of the primary thread pool.
918 The default is 16; the minimum value is 2.
920 .B timelimit {<integer>|unlimited}
922 .B timelimit time[.{soft|hard}]=<integer> [...]
923 Specify the maximum number of seconds (in real time)
925 will spend answering a search request. The default time limit is 3600.
928 to specify no limits.
929 The second format allows a fine grain setting of the time limits.
930 Extra args can be added on the same line.
933 for an explanation of the different flags.
935 .B tool-threads <integer>
936 Specify the maximum number of threads to use in tool mode.
937 This should not be greater than the number of CPUs in the system.
939 .\"ucdata-path is obsolete / ignored...
941 .\".B ucdata-path <path>
942 .\"Specify the path to the directory containing the Unicode character
943 .\"tables. The default path is DATADIR/ucdata.
947 is built with support for Transport Layer Security, there are more options
950 .B TLSCipherSuite <cipher-suite-spec>
951 Permits configuring what ciphers will be accepted and the preference order.
952 <cipher-suite-spec> should be a cipher specification for OpenSSL. Example:
954 TLSCipherSuite HIGH:MEDIUM:+SSLv2
956 To check what ciphers a given spec selects, use:
958 openssl ciphers -v <cipher-suite-spec>
960 .B TLSCACertificateFile <filename>
961 Specifies the file that contains certificates for all of the Certificate
966 .B TLSCACertificatePath <path>
967 Specifies the path of a directory that contains Certificate Authority
968 certificates in separate individual files. Usually only one of this
969 or the TLSCACertificateFile is used.
971 .B TLSCertificateFile <filename>
972 Specifies the file that contains the
976 .B TLSCertificateKeyFile <filename>
977 Specifies the file that contains the
979 server private key that matches the certificate stored in the
980 .B TLSCertificateFile
981 file. Currently, the private key must not be protected with a password, so
982 it is of critical importance that it is protected carefully.
984 .B TLSDHParamFile <filename>
985 This directive specifies the file that contains parameters for Diffie-Hellman
986 ephemeral key exchange. This is required in order to use a DSA certificate on
987 the server. If multiple sets of parameters are present in the file, all of
988 them will be processed. Note that setting this option may also enable
989 Anonymous Diffie-Hellman key exchanges in certain non-default cipher suites.
990 You should append "!ADH" to your cipher suites if you have changed them
991 from the default, otherwise no certificate exchanges or verification will
994 .B TLSRandFile <filename>
995 Specifies the file to obtain random bits from when /dev/[u]random
996 is not available. Generally set to the name of the EGD/PRNGD socket.
997 The environment variable RANDFILE can also be used to specify the filename.
999 .B TLSVerifyClient <level>
1000 Specifies what checks to perform on client certificates in an
1001 incoming TLS session, if any.
1004 can be specified as one of the following keywords:
1008 This is the default.
1010 will not ask the client for a certificate.
1013 The client certificate is requested. If no certificate is provided,
1014 the session proceeds normally. If a bad certificate is provided,
1015 it will be ignored and the session proceeds normally.
1018 The client certificate is requested. If no certificate is provided,
1019 the session proceeds normally. If a bad certificate is provided,
1020 the session is immediately terminated.
1022 .B demand | hard | true
1023 These keywords are all equivalent, for compatibility reasons.
1024 The client certificate is requested. If no certificate is provided,
1025 or a bad certificate is provided, the session is immediately terminated.
1027 Note that a valid client certificate is required in order to use the
1028 SASL EXTERNAL authentication mechanism with a TLS session. As such,
1031 setting must be chosen to enable SASL EXTERNAL authentication.
1034 .B TLSCRLCheck <level>
1035 Specifies if the Certificate Revocation List (CRL) of the CA should be
1036 used to verify if the client certificates have not been revoked. This
1038 .B TLSCACertificatePath
1039 parameter to be set.
1041 can be specified as one of the following keywords:
1045 No CRL checks are performed
1048 Check the CRL of the peer certificate
1051 Check the CRL for a whole certificate chain
1053 .SH GENERAL BACKEND OPTIONS
1054 Options in this section only apply to the configuration file section
1055 for the specified backend. They are supported by every
1058 .B backend <databasetype>
1059 Mark the beginning of a backend definition. <databasetype>
1077 depending on which backend will serve the database.
1079 .SH GENERAL DATABASE OPTIONS
1080 Options in this section only apply to the configuration file section
1081 for the database in which they are defined. They are supported by every
1082 type of backend. Note that the
1086 option are mandatory for each database.
1088 .B database <databasetype>
1089 Mark the beginning of a new database instance definition. <databasetype>
1107 depending on which backend will serve the database.
1112 will automatically maintain the
1113 modifiersName, modifyTimestamp, creatorsName, and
1114 createTimestamp attributes for entries. It also controls
1115 the entryCSN and entryUUID attributes, which are needed
1116 by the syncrepl provider. By default, lastmod is on.
1118 .B limits <who> <limit> [<limit> [...]]
1119 Specify time and size limits based on who initiated an operation.
1126 anonymous | users | [dn[.<style>]=]<pattern> | group[/oc[/at]]=<pattern>
1132 <style> ::= exact | base | onelevel | subtree | children | regex | anonymous
1137 matches all unauthenticated clients.
1140 matches all authenticated clients;
1143 dn pattern is assumed unless otherwise specified by qualifying
1144 the (optional) key string
1150 (which are synonyms), to require an exact match; with
1152 to require exactly one level of depth match; with
1154 to allow any level of depth match, including the exact match; with
1156 to allow any level of depth match, not including the exact match;
1158 explicitly requires the (default) match based on POSIX (''extended'')
1159 regular expression pattern.
1162 matches unbound operations; the
1165 The same behavior is obtained by using the
1172 with the optional objectClass
1178 sets the limits for any DN listed in the values of the
1184 group objectClass (default
1186 whose DN exactly matches
1189 The currently supported limits are
1194 The syntax for time limits is
1195 .BR time[.{soft|hard}]=<integer> ,
1198 is the number of seconds slapd will spend answering a search request.
1199 If no time limit is explicitly requested by the client, the
1201 limit is used; if the requested time limit exceeds the
1204 .\".I "Administrative limit exceeded"
1205 .\"error is returned.
1206 limit, the value of the limit is used instead.
1209 limit is set to the keyword
1211 the soft limit is used in either case; if it is set to the keyword
1213 no hard limit is enforced.
1214 Explicit requests for time limits smaller or equal to the
1217 If no limit specifier is set, the value is assigned to the
1223 to preserve the original behavior.
1225 The syntax for size limits is
1226 .BR size[.{soft|hard|unchecked}]=<integer> ,
1229 is the maximum number of entries slapd will return answering a search
1231 If no size limit is explicitly requested by the client, the
1233 limit is used; if the requested size limit exceeds the
1236 .\".I "Administrative limit exceeded"
1237 .\"error is returned.
1238 limit, the value of the limit is used instead.
1241 limit is set to the keyword
1243 the soft limit is used in either case; if it is set to the keyword
1245 no hard limit is enforced.
1246 Explicit requests for size limits smaller or equal to the
1251 specifier sets a limit on the number of candidates a search request is allowed
1253 The rationale behind it is that searches for non-properly indexed
1254 attributes may result in large sets of candidates, which must be
1257 to determine whether they match the search filter or not.
1260 limit provides a means to drop such operations before they are even
1262 If the selected candidates exceed the
1264 limit, the search will abort with
1265 .IR "Unwilling to perform" .
1266 If it is set to the keyword
1268 no limit is applied (the default).
1271 the search is not even performed; this can be used to disallow searches
1272 for a specific set of users.
1273 If no limit specifier is set, the value is assigned to the
1279 to preserve the original behavior.
1281 In case of no match, the global limits are used.
1282 The default values are the same of
1291 control is requested, the
1293 size limit is used by default, because the request of a specific page size
1294 is considered an explicit request for a limitation on the number
1295 of entries to be returned.
1296 However, the size limit applies to the total count of entries returned within
1297 the search, and not to a single page.
1298 Additional size limits may be enforced; the syntax is
1299 .BR size.pr={<integer>|noEstimate|unlimited} ,
1302 is the max page size if no explicit limit is set; the keyword
1304 inhibits the server from returning an estimate of the total number
1305 of entries that might be returned
1306 (note: the current implementation does not return any estimate).
1309 indicates that no limit is applied to the pagedResults control page size.
1311 .B size.prtotal={<integer>|unlimited|disabled}
1312 allows to set a limit on the total number of entries that a pagedResults
1313 control allows to return.
1314 By default it is set to the
1319 is the max number of entries that the whole search with pagedResults control
1323 to allow unlimited number of entries to be returned, e.g. to allow
1324 the use of the pagedResults control as a means to circumvent size
1325 limitations on regular searches; the keyword
1327 disables the control, i.e. no paged results can be returned.
1328 Note that the total number of entries returned when the pagedResults control
1329 is requested cannot exceed the
1331 size limit of regular searches unless extended by the
1336 .B maxderefdepth <depth>
1337 Specifies the maximum number of aliases to dereference when trying to
1338 resolve an entry, used to avoid infinite alias loops. The default is 1.
1340 .B mirrormode on | off
1341 This option puts a replica database into "mirror" mode. Update
1342 operations will be accepted from any user, not just the updatedn. The
1343 database must already be configured as a slurpd or syncrepl consumer
1344 before this keyword may be set. This mode must be used with extreme
1345 care, as it does not offer any consistency guarantees. This feature
1346 is intended to be used with an external frontend that guarantees that
1347 writes are only directed to a single master, switching to an alternate
1348 server only if the original master goes down.
1349 By default, mirrormode is off.
1351 .B overlay <overlay-name>
1352 Add the specified overlay to this database. An overlay is a piece of
1353 code that intercepts database operations in order to extend or change
1354 them. Overlays are pushed onto
1355 a stack over the database, and so they will execute in the reverse
1356 of the order in which they were configured and the database itself
1357 will receive control last of all. See the
1358 .BR slapd.overlays (5)
1359 manual page for an overview of the available overlays.
1361 .B readonly on | off
1362 This option puts the database into "read-only" mode. Any attempts to
1363 modify the database will return an "unwilling to perform" error. By
1364 default, readonly is off.
1367 .B replica uri=ldap[s]://<hostname>[:port]|host=<hostname>[:port]
1368 .B [starttls=yes|critical]
1369 .B [suffix=<suffix> [...]]
1370 .B bindmethod=simple|sasl [binddn=<simple DN>] [credentials=<simple password>]
1371 .B [saslmech=<SASL mech>] [secprops=<properties>] [realm=<realm>]
1372 .B [authcId=<authentication ID>] [authzId=<authorization ID>]
1373 .B [attrs[!]=<attr list>]
1375 Specify a replication site for this database. Refer to the "OpenLDAP
1376 Administrator's Guide" for detailed information on setting up a replicated
1378 directory service. Zero or more
1380 instances can be used to select the subtrees that will be replicated
1381 (defaults to all the database).
1383 is deprecated in favor of the
1387 allows the replica LDAP server to be specified as an LDAP URI.
1392 requires the options
1396 and should only be used when adequate security services
1397 (e.g TLS or IPSEC) are in place. A
1403 Specific security properties (as with the
1405 keyword above) for a SASL bind can be set with the
1407 option. A non-default SASL realm can be set with the
1412 will use Kerberos, a kerberos instance should be given in
1416 can be given after the
1418 keyword to allow the selective replication of the listed attributes only;
1421 mark is used, the list is considered exclusive, i.e. the listed attributes
1423 If an objectClass is listed, all the related attributes
1424 are (are not) replicated.
1427 .B replogfile <filename>
1428 Specify the name of the replication log file to log changes to.
1429 The replication log is typically written by
1434 .BR slapd.replog (5)
1435 for more information. The specified file should be located
1436 in a directory with limited read/write/execute access as the replication
1437 logs may contain sensitive information.
1439 .B restrict <oplist>
1440 Specify a whitespace separated list of operations that are restricted.
1441 If defined inside a database specification, restrictions apply only
1442 to that database, otherwise they are global.
1443 Operations can be any of
1448 .BR extended[=<OID>] ,
1452 or the special pseudo-operations
1456 which respectively summarize read and write operations.
1464 keyword allows to indicate the OID of the specific operation
1468 Specify the distinguished name that is not subject to access control
1469 or administrative limit restrictions for operations on this database.
1470 This DN may or may not be associated with an entry. An empty root
1471 DN (the default) specifies no root access is to be granted. It is
1472 recommended that the rootdn only be specified when needed (such as
1473 when initially populating a database). If the rootdn is within
1474 a namingContext (suffix) of the database, a simple bind password
1475 may also be provided using the
1477 directive. Note that the rootdn is always needed when using syncrepl.
1479 .B rootpw <password>
1480 Specify a password (or hash of the password) for the rootdn. The
1481 password can only be set if the rootdn is within the namingContext
1482 (suffix) of the database.
1483 This option accepts all RFC 2307 userPassword formats known to
1486 description) as well as cleartext.
1488 may be used to generate a hash of a password. Cleartext
1489 and \fB{CRYPT}\fP passwords are not recommended. If empty
1490 (the default), authentication of the root DN is by other means
1491 (e.g. SASL). Use of SASL is encouraged.
1493 .B suffix <dn suffix>
1494 Specify the DN suffix of queries that will be passed to this
1495 backend database. Multiple suffix lines can be given and at least one is
1496 required for each database definition.
1497 If the suffix of one database is "inside" that of another, the database
1498 with the inner suffix must come first in the configuration file.
1500 .B subordinate [advertise]
1501 Specify that the current backend database is a subordinate of another
1502 backend database. A subordinate database may have only one suffix. This
1503 option may be used to glue multiple databases into a single namingContext.
1504 If the suffix of the current database is within the namingContext of a
1505 superior database, searches against the superior database will be
1506 propagated to the subordinate as well. All of the databases
1507 associated with a single namingContext should have identical rootdns.
1508 Behavior of other LDAP operations is unaffected by this setting. In
1509 particular, it is not possible to use moddn to move an entry from
1510 one subordinate to another subordinate within the namingContext.
1512 If the optional \fBadvertise\fP flag is supplied, the naming context of
1513 this database is advertised in the root DSE. The default is to hide this
1514 database context, so that only the superior context is visible.
1521 are used on the superior database, any glued subordinates that support
1522 these tools are opened as well.
1524 Databases that are glued together should usually be configured with the
1525 same indices (assuming they support indexing), even for attributes that
1526 only exist in some of these databases. In general, all of the glued
1527 databases should be configured as similarly as possible, since the intent
1528 is to provide the appearance of a single directory.
1530 Note that the \fIsubordinate\fP functionality is implemented internally
1531 by the \fIglue\fP overlay and as such its behavior will interact with other
1532 overlays in use. By default, the glue overlay is automatically configured as
1533 the last overlay on the superior backend. Its position on the backend
1534 can be explicitly configured by setting an \fBoverlay glue\fP directive
1535 at the desired position. This explicit configuration is necessary e.g.
1536 when using the \fIsyncprov\fP overlay, which needs to follow \fIglue\fP
1537 in order to work over all of the glued databases. E.g.
1541 suffix dc=example,dc=com
1549 .B syncrepl rid=<replica ID>
1550 .B provider=ldap[s]://<hostname>[:port]
1551 .B searchbase=<base DN>
1552 .B [type=refreshOnly|refreshAndPersist]
1553 .B [interval=dd:hh:mm:ss]
1554 .B [retry=[<retry interval> <# of retries>]+]
1555 .B [filter=<filter str>]
1556 .B [scope=sub|one|base|subord]
1557 .B [attrs=<attr list>]
1559 .B [sizelimit=<limit>]
1560 .B [timelimit=<limit>]
1561 .B [schemachecking=on|off]
1562 .B [bindmethod=simple|sasl]
1564 .B [saslmech=<mech>]
1565 .B [authcid=<identity>]
1566 .B [authzid=<identity>]
1567 .B [credentials=<passwd>]
1569 .B [secprops=<properties>]
1570 .B [starttls=yes|critical]
1571 .B [tls_cert=<file>]
1573 .B [tls_cacert=<file>]
1574 .B [tls_cacertdir=<path>]
1575 .B [tls_reqcert=never|allow|try|demand]
1576 .B [tls_ciphersuite=<ciphers>]
1577 .B [tls_crlcheck=none|peer|all]
1578 .B [logbase=<base DN>]
1579 .B [logfilter=<filter str>]
1580 .B [syncdata=default|accesslog|changelog]
1582 Specify the current database as a replica which is kept up-to-date with the
1583 master content by establishing the current
1585 as a replication consumer site running a
1588 The replica content is kept synchronized to the master content using
1589 the LDAP Content Synchronization protocol. Refer to the
1590 "OpenLDAP Administrator's Guide" for detailed information on
1591 setting up a replicated
1593 directory service using the
1598 identifies the current
1600 directive within the replication consumer site.
1601 It is a non-negative integer having no more than three digits.
1604 specifies the replication provider site containing the master content
1605 as an LDAP URI. If <port> is not given, the standard LDAP port number
1606 (389 or 636) is used.
1610 replica is defined using a search
1611 specification as its result set. The consumer
1613 will send search requests to the provider
1615 according to the search specification. The search specification includes
1616 .B searchbase, scope, filter, attrs, attrsonly, sizelimit,
1619 parameters as in the normal search specification.
1620 The \fBscope\fP defaults to \fBsub\fP, the \fBfilter\fP defaults to
1621 \fB(objectclass=*)\fP, and there is no default \fBsearchbase\fP. The
1622 \fBattrs\fP list defaults to \fB"*,+"\fP to return all user and operational
1623 attributes, and \fBattrsonly\fP is unset by default.
1624 The \fBsizelimit\fP and \fBtimelimit\fP only
1625 accept "unlimited" and positive integers, and both default to "unlimited".
1626 Note, however, that any provider-side limits for the replication identity
1627 will be enforced by the provider regardless of the limits requested
1628 by the LDAP Content Synchronization operation, much like for any other
1631 The LDAP Content Synchronization protocol has two operation types.
1634 operation, the next synchronization search operation
1635 is periodically rescheduled at an interval time (specified by
1637 parameter; 1 day by default)
1638 after each synchronization operation finishes.
1640 .B refreshAndPersist
1641 operation, a synchronization search remains persistent in the provider slapd.
1642 Further updates to the master replica will generate
1643 .B searchResultEntry
1644 to the consumer slapd as the search responses to the persistent
1645 synchronization search.
1647 If an error occurs during replication, the consumer will attempt to
1648 reconnect according to the
1650 parameter which is a list of the <retry interval> and <# of retries> pairs.
1651 For example, retry="60 10 300 3" lets the consumer retry every 60 seconds
1652 for the first 10 times and then retry every 300 seconds for the next 3
1653 times before stop retrying. The `+' in <# of retries> means indefinite
1654 number of retries until success.
1656 The schema checking can be enforced at the LDAP Sync
1657 consumer site by turning on the
1659 parameter. The default is off.
1665 requires the options
1669 and should only be used when adequate security services
1670 (e.g. TLS or IPSEC) are in place.
1671 .B REMEMBER: simple bind credentials must be in cleartext!
1678 Depending on the mechanism, an authentication identity and/or
1679 credentials can be specified using
1685 parameter may be used to specify an authorization identity.
1686 Specific security properties (as with the
1688 keyword above) for a SASL bind can be set with the
1690 option. A non default SASL realm can be set with the
1693 The provider, other than allow authentication of the syncrepl identity,
1694 should grant that identity appropriate access privileges to the data
1695 that is being replicated (\fBaccess\fP directive), and appropriate time
1696 and size limits (\fBlimits\fP directive).
1701 parameter specifies use of the StartTLS extended operation
1702 to establish a TLS session before Binding to the provider. If the
1704 argument is supplied, the session will be aborted if the StartTLS request
1705 fails. Otherwise the syncrepl session continues without TLS. The
1706 tls_reqcert setting defaults to "demand" and the other TLS settings
1707 default to the same as the main slapd TLS settings.
1709 Rather than replicating whole entries, the consumer can query logs of
1710 data modifications. This mode of operation is referred to as \fIdelta
1711 syncrepl\fP. In addition to the above parameters, the
1715 parameters must be set appropriately for the log that will be used. The
1717 parameter must be set to either "accesslog" if the log conforms to the
1718 .BR slapo-accesslog (5)
1719 log format, or "changelog" if the log conforms
1720 to the obsolete \fIchangelog\fP format. If the
1722 parameter is omitted or set to "default" then the log parameters are
1727 This option is only applicable in a slave
1728 database updated using
1730 It specifies the DN permitted to update (subject to access controls)
1731 the replica (typically, this is the DN
1733 binds to update the replica). Generally, this DN
1740 Specify the referral to pass back when
1742 is asked to modify a replicated local database.
1743 If specified multiple times, each url is provided.
1745 .SH DATABASE-SPECIFIC OPTIONS
1746 Each database may allow specific configuration options; they are
1747 documented separately in the backends' manual pages. See the
1748 .BR slapd.backends (5)
1749 manual page for an overview of available backends.
1752 Here is a short example of a configuration file:
1756 include SYSCONFDIR/schema/core.schema
1757 pidfile LOCALSTATEDIR/run/slapd.pid
1759 # Subtypes of "name" (e.g. "cn" and "ou") with the
1760 # option ";x-hidden" can be searched for/compared,
1761 # but are not shown. See \fBslapd.access\fP(5).
1762 attributeoptions x-hidden lang-
1763 access to attrs=name;x-hidden by * =cs
1765 # Protect passwords. See \fBslapd.access\fP(5).
1766 access to attrs=userPassword by * auth
1767 # Read access to other attributes and entries.
1768 access to * by * read
1771 suffix "dc=our-domain,dc=com"
1772 # The database directory MUST exist prior to
1773 # running slapd AND should only be accessible
1774 # by the slapd/tools. Mode 0700 recommended.
1775 directory LOCALSTATEDIR/openldap-data
1776 # Indices to maintain
1777 index objectClass eq
1778 index cn,sn,mail pres,eq,approx,sub
1780 # We serve small clients that do not handle referrals,
1781 # so handle remote lookups on their behalf.
1784 uri ldap://ldap.some-server.com/
1789 "OpenLDAP Administrator's Guide" contains a longer annotated
1790 example of a configuration file.
1791 The original ETCDIR/slapd.conf is another example.
1795 default slapd configuration file
1798 .BR slapd\-config (5),
1799 .BR slapd.access (5),
1800 .BR slapd.backends (5),
1801 .BR slapd.overlays (5),
1802 .BR slapd.plugin (5),
1803 .BR slapd.replog (5),
1815 "OpenLDAP Administrator's Guide" (http://www.OpenLDAP.org/doc/admin/)
1816 .SH ACKNOWLEDGEMENTS
projects / openldap / blob