# $OpenLDAP$
-# Copyright 1999-2000, The OpenLDAP Foundation, All Rights Reserved.
+# Copyright 1999-2008 The OpenLDAP Foundation, All Rights Reserved.
# COPYING RESTRICTIONS APPLY, see COPYRIGHT.
H1: The slapd Configuration File
{{slapd.conf}}(5) file, normally installed in the
{{EX:/usr/local/etc/openldap}} directory.
-An alternate configuration file can be specified via a
-command-line option to {{slapd}}(8) or {{slurpd}}(8). This chapter
-describes the general format of the config file, followed by a
-detailed description of commonly used config file directives.
+An alternate configuration file location can be specified via a command-line
+option to {{slapd}}(8). This chapter describes the general format
+of the {{slapd.conf}}(5) configuration file, followed by a detailed
+description of commonly used config file directives.
H2: Configuration File Format
-The {{slapd.conf}}(5) file consists three types of configuration
-information: global, backend specific, database specific. Global
+The {{slapd.conf}}(5) file consists of three types of configuration
+information: global, backend specific, and database specific. Global
information is specified first, followed by information associated
with a particular backend type, which is then followed by information
associated with a particular database instance. Global directives can
-be overridden in a backend and/or database directives, backend directives
+be overridden in backend and/or database directives, and backend directives
can be overridden by database directives.
Blank lines and comment lines beginning with a '{{EX:#}}' character
are ignored. If a line begins with white space, it is considered a
-continuation of the previous line. The general format of slapd.conf is
-as follows:
+continuation of the previous line (even if the previous line is a
+comment).
+
+The general format of slapd.conf is as follows:
> # global configuration directives
> <global config directives>
The distribution contains an example configuration file that will
be installed in the {{F: /usr/local/etc/openldap}} directory.
-A number of files containing schema definition (attribute types
+A number of files containing schema definitions (attribute types
and object classes) are also provided in the
{{F: /usr/local/etc/openldap/schema}} directory.
H2: Configuration File Directives
This section details commonly used configuration directives. For
-a complete list, see {{slapd.conf}}(5) manual page. This section
+a complete list, see the {{slapd.conf}}(5) manual page. This section
separates the configuration file directives into global,
backend-specific and data-specific categories, describing each
directive and its default value (if any), and giving an example of
H3: Global Directives
Directives described in this section apply to all backends
-and databases, unless specifically overridden in a backend or
-database definition. Arguments to directives should be replaced
+and databases unless specifically overridden in a backend or
+database definition. Arguments that should be replaced
by actual text are shown in brackets {{EX:<>}}.
-H4: access to <what> [ by <who> <accesslevel> <control> ]+
+H4: access to <what> [ by <who> [<accesslevel>] [<control>] ]+
+
+This directive grants access (specified by <accesslevel>) to a set
+of entries and/or attributes (specified by <what>) by one or more
+requestors (specified by <who>). See the {{SECT:The access
+Configuration Directive}} section of this chapter for a summary of
+basic usage.
-This directive grants access (specified by <accesslevel>) to a
-set of entries and/or attributes (specified by <what>) by one or
-more requesters (specified by <who>).
-See the {{SECT:Access Control}} section of this chapter for a
-summary of basic usage.
!if 0
More details discussion of this directive can be found in the
{{SECT:Advanced Access Control}} chapter.
!endif
+Note: If no {{EX:access}} directives are specified, the default
+access control policy, {{EX:access to * by * read}}, allows all
+both authenticated and anonymous users read access.
-H4: attributetype <{{REF:RFC2252}} Attribute Type Description>
+
+H4: attributetype <{{REF:RFC4512}} Attribute Type Description>
This directive defines an attribute type.
Please see the {{SECT:Schema Specification}} chapter
for information regarding how to use this directive.
-H4: defaultaccess { none | compare | search | read | write }
-
-This directive specifies the default access to grant requesters
-when no {{EX:access}} directives have been specified. Access
-levels implies all lesser access levels (e.g., read access
-implies search and compare but no write).
-
-Note: It is recommend that the {{EX:access}} directive be used
-to specify access control. See the {{SECT:Access Control}}
-section of this chapter for information regarding the {{EX:access}}
-directive.
-
-\Default:
-
-E: defaultaccess read
-
-
H4: idletimeout <integer>
Specify the number of seconds to wait before forcibly closing
-an idle client connections. A idletimeout of 0, the default,
+an idle client connection. An idletimeout of 0, the default,
disables this feature.
This directive specifies the level at which debugging statements
and operation statistics should be syslogged (currently logged to
-the {{syslogd}}(8) {EX:LOG_LOCAL4}} facility). You must have
+the {{syslogd}}(8) {{EX:LOG_LOCAL4}} facility). You must have
configured OpenLDAP {{EX:--enable-debug}} (the default) for this
to work (except for the two statistics levels, which are always
enabled). Log levels are additive. To display what numbers
or consult the table below. The possible values for <integer> are:
!block table; colaligns="RL"; align=Center; \
- title="Table 5.1: Debugging Levels"
+ title="Table 6.1: Debugging Levels"
Level Description
-1 enable all debugging
0 no debugging
E: loglevel 256
-H4: objectclass <{{REF:RFC2252}} Object Class Description>
+H4: objectclass <{{REF:RFC4512}} Object Class Description>
This directive defines an object class.
Please see the {{SECT:Schema Specification}} chapter for
H3: General Backend Directives
-H3: General Database Directives
+Directives in this section apply only to the backend in which
+they are defined. They are supported by every type of backend.
+Backend directives apply to all databases instances of the
+same type and, depending on the directive, may be overridden
+by database directives.
-Directives in this section only apply to the database in which
-they are defined. They are supported by every type of database.
+H4: backend <type>
-H4: database <databasetype>
+This directive marks the beginning of a backend declaration.
+{{EX:<type>}} should be one of the
+supported backend types listed in Table 6.2.
-This directive marks the beginning of a new database instance
-definition. <databasetype> should be one of ldbm, shell, or
-passwd, depending on which backend will serve the
-database.
+!block table; align=Center; coltags="EX,N"; \
+ title="Table 5.2: Database Backends"
+Types Description
+bdb Berkeley DB transactional backend
+dnssrv DNS SRV backend
+hdb Hierarchical variant of bdb backend
+ldap Lightweight Directory Access Protocol (Proxy) backend
+meta Meta Directory backend
+monitor Monitor backend
+passwd Provides read-only access to {{passwd}}(5)
+perl Perl Programmable backend
+shell Shell (extern program) backend
+sql SQL Programmable backend
+!endblock
\Example:
-> database ldbm
+> backend bdb
-This marks the beginning of a new LDBM backend database
-instance definition.
+This marks the beginning of a new {{TERM:BDB}} backend
+definition.
-H4: readonly { on | off }
+H3: General Database Directives
-This directive puts the database into "read-only" mode. Any
-attempts to modify the database will return an "unwilling to
-perform" error.
+Directives in this section apply only to the database in which
+they are defined. They are supported by every type of database.
-\Default:
+H4: database <type>
-> readonly off
+This directive marks the beginning of a database instance
+declaration.
+{{EX:<type>}} should be one of the
+supported backend types listed in Table 6.2.
-H4: replica
+\Example:
-> replica host=<hostname>[:<port>]
-> [bindmethod={ simple | kerberos | sasl }]
-> ["binddn=<DN>"]
-> [mech=<mech>]
-> [authcid=<identity>]
-> [authzid=<identity>]
-> [credentials=<password>]
-> [srvtab=<filename>]
-
-This directive specifies a replication site for this database. The
-{{EX:host=}} parameter specifies a host and optionally a port where
-the slave slapd instance can be found. Either a domain name
-or IP address may be used for <hostname>. If <port> is not
-given, the standard LDAP port number (389) is used.
-
-The {{EX:binddn=}} parameter gives the DN to bind as for updates to
-the slave slapd. It should be a DN which has read/write
-access to the slave slapd's database, typically given as a
-{{EX:rootdn}} in the slave's config file. It must also match the
-{{EX:updatedn}} directive in the slave slapd's config file. Since DNs are
-likely to contain embedded spaces, the entire {{EX:"binddn=<DN>"}}
-string should be enclosed in double quotes.
-
-The {{EX:bindmethod}} is {{EX:simple}} or {{EX:kerberos}} or {{EX:sasl}},
-depending on whether simple password-based authentication or Kerberos
-authentication or {{TERM:SASL}} authentication is to be used when connecting
-to the slave slapd.
-
-Simple authentication should not be used unless adequate integrity
-and privacy protections are in place (e.g. TLS or IPSEC). Simple
-authentication requires specification of {{EX:binddn}} and
-{{EX:credentials}} parameters.
-
-Kerberos authentication is deprecated in favor of SASL authentication
-mechanisms, in particular the {EX:KERBEROS_V4}} and {{EX:GSSAPI}}
-mechanisms. Kerberos authentication requires {{EX:binddn}} and
-{{EX:srvtab}} parameters.
+> database bdb
-SASL authentication is generally recommended. SASL authentication
-requires specification of a mechanism using the {{EX:mech}} parameter.
-Depending on the mechanism, an authentication identity and/or
-credentials can be specified using {{EX:authcid}} and {{EX:credentials}}
-respectively. The {{EX:authzid}} parameter may be used to specify
-an authorization identity.
+This marks the beginning of a new {{TERM:BDB}} database instance
+declaration.
-See the {{SECT:Replication}} chapter for more information on how to
-use this directive.
+H4: readonly { on | off }
-H4: replogfile <filename>
+This directive puts the database into "read-only" mode. Any
+attempts to modify the database will return an "unwilling to
+perform" error.
-This directive specifies the name of the replication log file to
-which slapd will log changes. The replication log is typically
-written by slapd and read by slurpd. Normally, this directive is
-only used if slurpd is being used to replicate the database.
-However, you can also use it to generate a transaction log, if
-slurpd is not running. In this case, you will need to periodically
-truncate the file, since it will grow indefinitely otherwise.
+\Default:
-See the {{SECT:Replication}} chapter for more information on how to
-use this directive.
+> readonly off
-H4: rootdn <dn>
+H4: rootdn <DN>
This directive specifies the DN that is not subject to
access control or administrative limit restrictions for
operations on this database. The DN need not refer to
-an entry in the directory. The DN may refer to a SASL
-identity.
+an entry in this database or even in the directory. The
+DN may refer to a SASL identity.
Entry-based Example:
-> rootdn "cn=Manager, dc=example, dc=com"
+> rootdn "cn=Manager,dc=example,dc=com"
SASL-based Example:
-> rootdn "uid=root@EXAMPLE.COM"
+> rootdn "uid=root,cn=example.com,cn=digest-md5,cn=auth"
+
+See the {{SECT:SASL Authentication}} section for information on
+SASL authentication identities.
H4: rootpw <password>
-This directive specifies a password for the DN given above that
-will always work, regardless of whether an entry with the given
-DN exists or has a password.
-This directive is deprecated in favor of SASL based authentication.
+This directive can be used to specifies a password for the DN for
+the rootdn (when the rootdn is set to a DN within the database).
\Example:
> rootpw secret
+It is also permissible to provide hash of the password in {{REF:RFC2307}}
+form. {{slappasswd}}(8) may be used to generate the password hash.
+
+\Example:
+
+> rootpw {SSHA}ZKKuqbEKJfKSXhUbHG3fG8MDn9j1v4QN
+
+The hash was generated using the command {{EX:slappasswd -s secret}}.
+
H4: suffix <dn suffix>
\Example:
-> suffix "dc=example, dc=com"
+> suffix "dc=example,dc=com"
-Queries with a DN ending in "dc=example, dc=com"
+Queries with a DN ending in "dc=example,dc=com"
will be passed to this backend.
-Note: when the backend to pass a query to is selected, slapd
+Note: When the backend to pass a query to is selected, slapd
looks at the suffix line(s) in each database definition in the
order they appear in the file. Thus, if one database suffix is a
prefix of another, it must appear after it in the config file.
-H4: updatedn <dn>
-This directive is only applicable in a slave slapd. It specifies the
-DN allowed to make changes to the replica. This may be the
-the DN slurpd binds as when making changes to the replica or
-the DN associated with a SASL identity.
+H4: syncrepl
+
+> syncrepl rid=<replica ID>
+> provider=ldap[s]://<hostname>[:port]
+> [type=refreshOnly|refreshAndPersist]
+> [interval=dd:hh:mm:ss]
+> [retry=[<retry interval> <# of retries>]+]
+> searchbase=<base DN>
+> [filter=<filter str>]
+> [scope=sub|one|base]
+> [attrs=<attr list>]
+> [attrsonly]
+> [sizelimit=<limit>]
+> [timelimit=<limit>]
+> [schemachecking=on|off]
+> [bindmethod=simple|sasl]
+> [binddn=<DN>]
+> [saslmech=<mech>]
+> [authcid=<identity>]
+> [authzid=<identity>]
+> [credentials=<passwd>]
+> [realm=<realm>]
+> [secprops=<properties>]
+
+
+This directive specifies the current database as a replica of the
+master content by establishing the current {{slapd}}(8) as a
+replication consumer site running a syncrepl replication engine.
+The master database is located at the replication provider site
+specified by the {{EX:provider}} parameter. The replica database is
+kept up-to-date with the master content using the LDAP Content
+Synchronization protocol. See {{REF:RFC4533}}
+for more information on the protocol.
+
+The {{EX:rid}} parameter is used for identification of the current
+{{EX:syncrepl}} directive within the replication consumer server,
+where {{EX:<replica ID>}} uniquely identifies the syncrepl specification
+described by the current {{EX:syncrepl}} directive. {{EX:<replica ID>}}
+is non-negative and is no more than three decimal digits in length.
+
+The {{EX:provider}} parameter specifies the replication provider site
+containing the master content as an LDAP URI. The {{EX:provider}}
+parameter specifies a scheme, a host and optionally a port where the
+provider slapd instance can be found. Either a domain name or IP
+address may be used for <hostname>. Examples are
+{{EX:ldap://provider.example.com:389}} or {{EX:ldaps://192.168.1.1:636}}.
+If <port> is not given, the standard LDAP port number (389 or 636) is used.
+Note that the syncrepl uses a consumer-initiated protocol, and hence its
+specification is located at the consumer site, whereas the {{EX:replica}}
+specification is located at the provider site. {{EX:syncrepl}} and
+{{EX:replica}} directives define two independent replication
+mechanisms. They do not represent the replication peers of each other.
+
+The content of the syncrepl replica is defined using a search
+specification as its result set. The consumer slapd will
+send search requests to the provider slapd according to the search
+specification. The search specification includes {{EX:searchbase}},
+{{EX:scope}}, {{EX:filter}}, {{EX:attrs}}, {{EX:attrsonly}},
+{{EX:sizelimit}}, and {{EX:timelimit}} parameters as in the normal
+search specification. The {{EX:searchbase}} parameter has no
+default value and must always be specified. The {{EX:scope}} defaults
+to {{EX:sub}}, the {{EX:filter}} defaults to {{EX:(objectclass=*)}},
+{{EX:attrs}} defaults to {{EX:"*,+"}} to replicate all user and operational
+attributes, and {{EX:attrsonly}} is unset by default. Both {{EX:sizelimit}}
+and {{EX:timelimit}} default to "unlimited", and only integers
+or "unlimited" may be specified.
+
+The LDAP Content Synchronization protocol has two operation
+types: {{EX:refreshOnly}} and {{EX:refreshAndPersist}}.
+The operation type is specified by the {{EX:type}} parameter.
+In the {{EX:refreshOnly}} operation, the next synchronization search operation
+is periodically rescheduled at an interval time after each
+synchronization operation finishes. The interval is specified
+by the {{EX:interval}} parameter. It is set to one day by default.
+In the {{EX:refreshAndPersist}} operation, a synchronization search
+remains persistent in the provider slapd. Further updates to the
+master replica will generate {{EX:searchResultEntry}} to the consumer slapd
+as the search responses to the persistent synchronization search.
+
+If an error occurs during replication, the consumer will attempt to reconnect
+according to the retry parameter which is a list of the <retry interval>
+and <# of retries> pairs. For example, retry="60 10 300 3" lets the consumer
+retry every 60 seconds for the first 10 times and then retry every 300 seconds
+for the next three times before stop retrying. + in <# of retries> means
+indefinite number of retries until success.
+
+The schema checking can be enforced at the LDAP Sync consumer site
+by turning on the {{EX:schemachecking}} parameter.
+If it is turned on, every replicated entry will be checked for its
+schema as the entry is stored into the replica content.
+Every entry in the replica should contain those attributes
+required by the schema definition.
+If it is turned off, entries will be stored without checking
+schema conformance. The default is off.
+
+The {{EX:binddn}} parameter gives the DN to bind as for the
+syncrepl searches to the provider slapd. It should be a DN
+which has read access to the replication content in the
+master database.
+
+The {{EX:bindmethod}} is {{EX:simple}} or {{EX:sasl}},
+depending on whether simple password-based authentication or
+{{TERM:SASL}} authentication is to be used when connecting
+to the provider slapd.
+
+Simple authentication should not be used unless adequate data
+integrity and confidentiality protections are in place (e.g. TLS
+or IPsec). Simple authentication requires specification of {{EX:binddn}}
+and {{EX:credentials}} parameters.
-Entry-based Example:
+SASL authentication is generally recommended. SASL authentication
+requires specification of a mechanism using the {{EX:saslmech}} parameter.
+Depending on the mechanism, an authentication identity and/or
+credentials can be specified using {{EX:authcid}} and {{EX:credentials}},
+respectively. The {{EX:authzid}} parameter may be used to specify
+an authorization identity.
-> updatedn "cn=Update Daemon, dc=example, dc=com"
+The {{EX:realm}} parameter specifies a realm which a certain
+mechanisms authenticate the identity within. The {{EX:secprops}}
+parameter specifies Cyrus SASL security properties.
-SASL-based Example:
+The syncrepl replication mechanism is supported by the two primary
+database backends: back-bdb and back-hdb.
-> updatedn "uid=slurpd@EXAMPLE.COM"
+See the {{SECT:LDAP Sync Replication}} chapter of the admin guide
+for more information on how to use this directive.
-See the {{SECT:Replication}} chapter for more information on how to
-use this directive.
H4: updateref <URL>
-This directive is only applicable in a slave slapd. It
+This directive is only applicable in a {{slave}} (or {{shadow}})
+{{slapd}}(8) instance. It
specifies the URL to return to clients which submit update
requests upon the replica.
If specified multiple times, each {{TERM:URL}} is provided.
\Example:
-> update ldap://master.example.net
-
-
-H3: LDBM Backend-Specific Directives
-
-Directives in this category only apply to the LDBM backend
-database. That is, they must follow a "database ldbm" line and
-come before any other "database" line.
-
-H4: cachesize <integer>
-
-This directive specifies the size in entries of the in-memory
-cache maintained by the LDBM backend database instance.
+> updateref ldap://master.example.net
-\Default:
-
-> cachesize 1000
-
-
-H4: dbcachesize <integer>
-
-This directive specifies the size in bytes of the in-memory cache
-associated with each open index file. If not supported by the
-underlying database method, this directive is ignored without
-comment. Increasing this number uses more memory but can
-cause a dramatic performance increase, especially during
-modifies or when building indexes.
-
-\Default:
-
-> dbcachesize 100000
+H3: BDB and HDB Database Directives
-H4: dbnolocking
-
-This option, if present, disables database locking.
-Enabling this option may improve performance at the expense
-of data security.
-
-
-H4: dbnosync
-
-This option causes on-disk database contents not be immediately
-synchronized with in memory changes upon change. Enabling this option
-may improve performance at the expense of data security.
+Directives in this category only apply to both the {{TERM:BDB}}
+and the {{TERM:HDB}} database.
+That is, they must follow a "database bdb" or "database hdb" line
+and come before any
+subsequent "backend" or "database" line. For a complete reference
+of BDB/HDB configuration directives, see {{slapd-bdb}}(5).
H4: directory <directory>
-This directive specifies the directory where the LDBM files
-containing the database and associated indexes live.
-
-\Default:
-
-> directory /usr/local/var/openldap-ldbm
-
-
-H4: index {<attrlist> | default} [pres,eq,approx,sub,none]
-
-This directive specifies the indexes to maintain for the given
-attribute. If only an {{EX:<attrlist>}} is given, the default
-indexes are maintained.
-
-
-\Example:
-
-> index default pres,eq
-> index objectClass,uid
-> index cn,sn eq,sub,approx
-
-The first line sets the default to indices to maintain to present
-and equality. The second line causes the default (pres,eq) set
-of indices to be maintained for {{EX:objectClass}} and {{EX:uid}} attribute
-types. The third line causes equality, substring, and approximate
-filters to be maintained for {{EX:cn}} and {{EX:sn}} attribute types.
-
-H4: mode <integer>
-
-This directive specifies the file protection mode that newly
-created database index files should have.
+This directive specifies the directory where the BDB files
+containing the database and associated indices live.
\Default:
-> mode 0600
-
-
+> directory /usr/local/var/openldap-data
-H3: Other Backend and Databases
-{{slapd}}(8) supports a number of other backend database types.
+H2: The access Configuration Directive
-!block table; align=Center; coltags="EX,N"; \
- title="Table 5.2: Backend Database Types"
-Types Description
-passwd Provides read-only access to {{F:/etc/passwd}}
-shell Shell (extern program) backend
-sql SQL Programmable backend
-!endblock
-
-See {{slapd.conf}}(5) for details.
-
-
-
-H2: Access Control
-
-Access to slapd entries and attributes is controlled by the
+Access to entries and attributes is controlled by the
access configuration file directive. The general form of an
access line is:
> <access directive> ::= access to <what>
-> [by <who> <access> <control>]+
-> <what> ::= * | [ dn[.<target style>]=<regex>]
+> [by <who> [<access>] [<control>] ]+
+> <what> ::= * |
+> [dn[.<basic-style>]=<regex> | dn.<scope-style>=<DN>]
> [filter=<ldapfilter>] [attrs=<attrlist>]
-> <target style> ::= regex | base | one | subtree | children
-> <attrlist> ::= <attr> | <attr> , <attrlist>
+> <basic-style> ::= regex | exact
+> <scope-style> ::= base | one | subtree | children
+> <attrlist> ::= <attr> [val[.<basic-style>]=<regex>] | <attr> , <attrlist>
> <attr> ::= <attrname> | entry | children
-> <who> ::= [* | anonymous | users | self |
-> dn[.<subject style>]=<regex>]
-> [dnattr=<attrname> ]
-> [group[/<objectclass>[/<attrname>][.<basic style>]]=<regex> ]
-> [peername[.<basic style>]=<regex>]
-> [sockname[.<basic style>]=<regex>]
-> [domain[.<basic style>]=<regex>]
-> [sockurl[.<basic style>]=<regex>]
+> <who> ::= * | [anonymous | users | self
+> | dn[.<basic-style>]=<regex> | dn.<scope-style>=<DN>]
+> [dnattr=<attrname>]
+> [group[/<objectclass>[/<attrname>][.<basic-style>]]=<regex>]
+> [peername[.<basic-style>]=<regex>]
+> [sockname[.<basic-style>]=<regex>]
+> [domain[.<basic-style>]=<regex>]
+> [sockurl[.<basic-style>]=<regex>]
> [set=<setspec>]
> [aci=<attrname>]
-> <subject style> ::= regex | exact | base | one | subtree | children
-> <basic style> ::= regex | exact
> <access> ::= [self]{<level>|<priv>}
-> <level> ::= none | auth | compare | search | read | write
-> <priv> ::= {=|+|-}{w|r|s|c|x}+
+> <level> ::= none | disclose | auth | compare | search | read | write | manage
+> <priv> ::= {=|+|-}{m|w|r|s|c|x|d|0}+
> <control> ::= [stop | continue | break]
-where the <what> part selects the entries and/or attributes to
-which the access applies, the {{EX:<who>}} part specifies which
-entities are granted access, and the {{EX:<access>}} part specifies
-the access granted. Multiple {{EX:<who> <access> <control>}} triplets
-are supported, allowing many entities to be granted different
-access to the same set of entries and attributes.
+where the <what> part selects the entries and/or attributes to which
+the access applies, the {{EX:<who>}} part specifies which entities
+are granted access, and the {{EX:<access>}} part specifies the
+access granted. Multiple {{EX:<who> <access> <control>}} triplets
+are supported, allowing many entities to be granted different access
+to the same set of entries and attributes. Not all of these access
+control options are described here; for more details see the
+{{slapd.access}}(5) man page.
H3: What to control access to
-The <what> part of an access specification determines the
-entries and attributes to which the access control applies.
-Entries can be selected in two ways: by a regular expression
-matching the entry's distinguished name:
+The <what> part of an access specification determines the entries
+and attributes to which the access control applies. Entries are
+commonly selected in two ways: by DN and by filter. The following
+qualifiers select entries by DN:
+
+> to *
+> to dn[.<basic-style>]=<regex>
+> to dn.<scope-style>=<DN>
-> dn=<regular expression>
+The first form is used to select all entries. The second form may
+be used to select entries by matching a regular expression against
+the target entry's {{normalized DN}}. (The second form is not
+discussed further in this document.) The third form is used to
+select entries which are within the requested scope of DN. The
+<DN> is a string representation of the Distinguished Name, as
+described in {{REF:RFC4514}}.
-Note: The DN pattern specified should be "normalized",
-meaning that there should be no extra spaces, and commas
-should be used to separate components. An example
-normalized DN is "cn=Babs Jensen,dc=example,dc=com".
-An example of a non-normalized DN is
-"cn=Babs Jensen; dc=example, dc=com".
+The scope can be either {{EX:base}}, {{EX:one}}, {{EX:subtree}},
+or {{EX:children}}. Where {{EX:base}} matches only the entry with
+provided DN, {{EX:one}} matches the entries whose parent is the
+provided DN, {{EX:subtree}} matches all entries in the subtree whose
+root is the provided DN, and {{EX:children}} matches all entries
+under the DN (but not the entry named by the DN).
-Or, entries may be selected by a filter matching some
-attribute(s) in the entry:
+For example, if the directory contained entries named:
-> filter=<ldap filter>
+> 0: o=suffix
+> 1: cn=Manager,o=suffix
+> 2: ou=people,o=suffix
+> 3: uid=kdz,ou=people,o=suffix
+> 4: cn=addresses,uid=kdz,ou=people,o=suffix
+> 5: uid=hyc,ou=people,o=suffix
+
+\Then:
+. {{EX:dn.base="ou=people,o=suffix"}} match 2;
+. {{EX:dn.one="ou=people,o=suffix"}} match 3, and 5;
+. {{EX:dn.subtree="ou=people,o=suffix"}} match 2, 3, 4, and 5; and
+. {{EX:dn.children="ou=people,o=suffix"}} match 3, 4, and 5.
+
+
+Entries may also be selected using a filter:
+
+> to filter=<ldap filter>
where <ldap filter> is a string representation of an LDAP
-search filter, as described in {{REF:RFC2254}}.
+search filter, as described in {{REF:RFC4515}}. For example:
+
+> to filter=(objectClass=person)
+
+Note that entries may be selected by both DN and filter by
+including both qualifiers in the <what> clause.
+
+> to dn.one="ou=people,o=suffix" filter=(objectClass=person)
-Attributes within an entry are selected by including a
-comma-separated list of attribute names in the <what>
-selector:
+Attributes within an entry are selected by including a comma-separated
+list of attribute names in the <what> selector:
> attrs=<attribute list>
-Access to the entry itself must be granted or denied using the
-special attribute name "{{EX:entry}}". Note that giving access to an
-attribute is not enough; access to the entry itself through the
-{{EX:entry}} attribute is also required. The complete examples at
-the end of this section should help clear things up.
+A specific value of an attribute is selected by using a single
+attribute name and also using a value selector:
-Lastly, there is a special entry selector {{EX:"*"}} is used to
+> attrs=<attribute> val[.<style>]=<regex>
+
+There are two special {{pseudo}} attributes {{EX:entry}} and
+{{EX:children}}. To read (and hence return) a target entry, the
+subject must have {{EX:read}} access to the target's {{entry}}
+attribute. To add or delete an entry, the subject must have
+{{EX:write}} access to the entry's {{EX:entry}} attribute AND must
+have {{EX:write}} access to the entry's parent's {{EX:children}}
+attribute. To rename an entry, the subject must have {{EX:write}}
+access to entry's {{EX:entry}} attribute AND have {{EX:write}}
+access to both the old parent's and new parent's {{EX:children}}
+attributes. The complete examples at the end of this section should
+help clear things up.
+
+Lastly, there is a special entry selector {{EX:"*"}} that is used to
select any entry. It is used when no other {{EX:<what>}}
selector has been provided. It's equivalent to "{{EX:dn=.*}}"
The <who> part identifies the entity or entities being granted
access. Note that access is granted to "entities" not "entries."
-The follow table summaries entity specifiers:
+The following table summarizes entity specifiers:
!block table; align=Center; coltags="EX,N"; \
- title="Table 5.3: Access Entity Specifiers"
-Specifier Entities
-* All, including anonymous and authenticated users
-anonymous Anonymous (non-authenticated) users
-users Authenticated users
-self User associated with target entry
-dn=<regex> Users matching regular expression
+ title="Table 6.3: Access Entity Specifiers"
+Specifier|Entities
+*|All, including anonymous and authenticated users
+anonymous|Anonymous (non-authenticated) users
+users|Authenticated users
+self|User associated with target entry
+dn[.<basic-style>]=<regex>|Users matching a regular expression
+dn.<scope-style>=<DN>|Users within scope of a DN
!endblock
-The DN specifier takes a regular expression which is used
-to match against the "normalized" DN of the current entity.
-
-> dn=<regular expression>
-
-By "normalized", we mean that all extra spaces have been
-removed from the entities DN and commas are used to
-separate RDN components.
+The DN specifier behaves much like <what> clause DN specifiers.
-Other control factors forms are also supported.
-For example, a {{EX:<what>}} can be restricted by a
-regular expression matching the client's IP address or domain name:
-
-> addr=<regular expression>
-> domain=<regular expression>
-
-or by an entry listed in a DN-valued attribute in the entry to
-which the access applies:
+Other control factors are also supported. For example, a {{EX:<who>}}
+can be restricted by an entry listed in a DN-valued attribute in
+the entry to which the access applies:
> dnattr=<dn-valued attribute name>
access to a group entry to whoever is listed as the owner of
the group entry).
+Some factors may not be appropriate in all environments (or any).
+For example, the domain factor relies on IP to domain name lookups.
+As these can easily be spoofed, the domain factor should be avoided.
-H3: The access to grant
+H3: The access to grant
The kind of <access> granted can be one of the following:
-
!block table; colaligns="LRL"; coltags="EX,EX,N"; align=Center; \
- title="Table 5.4: Access Levels"
-Level Privledges Description
-none no access
-auth =x needed to bind
-compare =cx needed to compare
-search =scx needed to apply search filters
-read =rscx needed to read search results
-write =wrscx needed to modify/rename
+ title="Table 6.4: Access Levels"
+Level Privileges Description
+none =0 no access
+disclose =d needed for information disclosure on error
+auth =dx needed to authenticate (bind)
+compare =cdx needed to compare
+search =scdx needed to apply search filters
+read =rscdx needed to read search results
+write =wrscdx needed to modify/rename
+manage =mwrscdx needed to manage
!endblock
-Each level implies all lower levels of access. So, for
-example, granting someone write access to an entry also
-grants them read, search, compare, and auth access. However,
-one may use the privledges specify to grant specific permissions.
+Each level implies all lower levels of access. So, for example,
+granting someone {{EX:write}} access to an entry also grants them
+{{EX:read}}, {{EX:search}}, {{EX:compare}}, {{EX:auth}} and
+{{EX:disclose}} access. However, one may use the privileges specifier
+to grant specific permissions.
H3: Access Control Evaluation
-When evaluating whether some requester should be given
-access to an entry and/or attribute, slapd compares the entry
-and/or attribute to the {{EX:<what>}} selectors given in the
-configuration file. Access directives local to the current
-database are examined first, followed by global access
-directives. Within this priority, access directives are
-examined in the order in which they appear in the config file.
-Slapd stops with the first {{EX:<what>}} selector that matches the
-entry and/or attribute. The corresponding access directive is
-the one slapd will use to evaluate access.
-
-Next, slapd compares the entity requesting access to the
-{{EX:<who>}} selectors within the access directive selected above,
-in the order in which they appear. It stops with the first {{EX:<who>}}
-selector that matches the requester. This determines the
-access the entity requesting access has to the entry and/or
-attribute.
+When evaluating whether some requester should be given access to
+an entry and/or attribute, slapd compares the entry and/or attribute
+to the {{EX:<what>}} selectors given in the configuration file.
+For each entry, access controls provided in the database which holds
+the entry (or the first database if not held in any database) apply
+first, followed by the global access directives. Within this
+priority, access directives are examined in the order in which they
+appear in the config file. Slapd stops with the first {{EX:<what>}}
+selector that matches the entry and/or attribute. The corresponding
+access directive is the one slapd will use to evaluate access.
+
+Next, slapd compares the entity requesting access to the {{EX:<who>}}
+selectors within the access directive selected above in the order
+in which they appear. It stops with the first {{EX:<who>}} selector
+that matches the requester. This determines the access the entity
+requesting access has to the entry and/or attribute.
Finally, slapd compares the access granted in the selected
-{{EX:<access>}} clause to the access requested by the client. If it
-allows greater or equal access, access is granted. Otherwise,
+{{EX:<access>}} clause to the access requested by the client. If
+it allows greater or equal access, access is granted. Otherwise,
access is denied.
-The order of evaluation of access directives makes their
-placement in the configuration file important. If one access
-directive is more specific than another in terms of the entries
-it selects, it should appear first in the config file. Similarly, if
-one {{EX:<who>}} selector is more specific than another it should
-come first in the access directive. The access control
-examples given below should help make this clear.
+The order of evaluation of access directives makes their placement
+in the configuration file important. If one access directive is
+more specific than another in terms of the entries it selects, it
+should appear first in the config file. Similarly, if one {{EX:<who>}}
+selector is more specific than another it should come first in the
+access directive. The access control examples given below should
+help make this clear.
H3: Access Control Examples
-The access control facility described above is quite powerful.
-This section shows some examples of its use. First, some
-simple examples:
+The access control facility described above is quite powerful. This
+section shows some examples of its use for descriptive purposes.
+
+A simple example:
> access to * by * read
> by anonymous auth
> by * read
-This directive allows users to modify their own entries,
-allows authenticate, and allows authenticated users to read.
-Note that only the first {{EX:by <who>}} clause which matches applies.
-Hence, the anonymous users are granted {{EX:auth}}, not {{EX:read}}.
-The last clause just as well have been "{{EX:by users read}}".
+This directive allows the user to modify their entry, allows anonymous
+to authentication against these entries, and allows all others to
+read these entries. Note that only the first {{EX:by <who>}} clause
+which matches applies. Hence, the anonymous users are granted
+{{EX:auth}}, not {{EX:read}}. The last clause could just as well
+have been "{{EX:by users read}}".
-The following example shows the use of a regular expression
-to select the entries by DN in two access directives where
-ordering is significant.
+It is often desirable to restrict operations based upon the level
+of protection in place. The following shows how security strength
+factors (SSF) can be used.
-> access to dn=".*,dc=example,dc=com"
+> access to *
+> by ssf=128 self write
+> by ssf=64 anonymous auth
+> by ssf=64 users read
+
+This directive allows users to modify their own entries if security
+protections have of strength 128 or better have been established,
+allows authentication access to anonymous users, and read access
+when 64 or better security protections have been established. If
+client has not establish sufficient security protections, the
+implicit {{EX:by * none}} clause would be applied.
+
+The following example shows the use of a style specifiers to select
+the entries by DN in two access directives where ordering is
+significant.
+
+> access to dn.children="dc=example,dc=com"
> by * search
-> access to dn=".*,dc=com"
+> access to dn.children="dc=com"
> by * read
-Read access is granted to entries under the {{EX:dc=com}}
-subtree, except for those entries under the {{EX:dc=example,dc=com}}
-subtree, to which search access is granted. No access is granted to
-{{EX:dc=com}} as neither access directive matches this DN.
-If the order of these access directives was reversed, the
-trailing directive would never be reached, since all
-{{EX:dc=example,dc=com}} entries are also {{EX:dc=com}} entries.
-
-Also note that if no {{EX:access to}} directive matches or
-no {{EX:by <who>}} clause, {{B:access is denied}}. That is, every
-{{EX:access to}} directive ends with a implicit {{EX:by * none}}
-clause and access list itself ends with {{EX:access to * by * none}}
-directive. Only if no access controls are specified, is the
-{{EX:defaultaccess}} granted.
-
-The next example again shows the importance of ordering,
-both of the access directives and the {{EX:by <who>}} clauses.
-It also shows the use of an attribute selector to grant access
-to a specific attribute and various {{EX:<who>}} selectors.
-
-> access to dn="(.*,)?dc=example,dc=com" attr=homePhone
+Read access is granted to entries under the {{EX:dc=com}} subtree,
+except for those entries under the {{EX:dc=example,dc=com}} subtree,
+to which search access is granted. No access is granted to
+{{EX:dc=com}} as neither access directive matches this DN. If the
+order of these access directives was reversed, the trailing directive
+would never be reached, since all entries under {{EX:dc=example,dc=com}}
+are also under {{EX:dc=com}} entries.
+
+Also note that if no {{EX:access to}} directive matches or no {{EX:by
+<who>}} clause, {{B:access is denied}}. That is, every {{EX:access
+to}} directive ends with an implicit {{EX:by * none}} clause and
+every access list ends with an implicit {{EX:access to * by * none}}
+directive.
+
+The next example again shows the importance of ordering, both of
+the access directives and the {{EX:by <who>}} clauses. It also
+shows the use of an attribute selector to grant access to a specific
+attribute and various {{EX:<who>}} selectors.
+
+> access to dn.subtree="dc=example,dc=com" attrs=homePhone
> by self write
-> by dn="(.*,)?dc=example,dc=com" search
-> by domain=.*\.example\.com read
-> access to dn="(.*,)?dc=example,dc=com"
+> by dn.children="dc=example,dc=com" search
+> by peername.regex=IP:10\..+ read
+> access to dn.subtree="dc=example,dc=com"
> by self write
-> by dn=".*,dc=example,dc=com" search
+> by dn.children="dc=example,dc=com" search
> by anonymous auth
-This example applies to entries in the "{{EX:dc=example, dc=com}}"
-subtree. To all attributes except {{EX:homePhone}}, the entry itself
-can write them, other {{EX:example.com}} entries can search by them,
-anybody else has no access ((implicit {{EX:by * none}}) excepting for
-authentication/authorization (which is always done anonymously).
-The {{EX:homePhone}} attribute is writable by the entry, searchable
-by other {{EX:example.com}} entries, readable by clients connecting
-from somewhere in the {{EX:example.com}} domain, and otherwise not
-readable (implicit {{EX:by * none}}). All other access
-is denied by the implicit {{EX:access to * by * none}}.
+This example applies to entries in the "{{EX:dc=example,dc=com}}"
+subtree. To all attributes except {{EX:homePhone}}, an entry can
+write to itself, entries under {{EX:example.com}} entries can search
+by them, anybody else has no access (implicit {{EX:by * none}})
+excepting for authentication/authorization (which is always done
+anonymously). The {{EX:homePhone}} attribute is writable by the
+entry, searchable by entries under {{EX:example.com}}, readable by
+clients connecting from network 10, and otherwise not readable
+(implicit {{EX:by * none}}). All other access is denied by the
+implicit {{EX:access to * by * none}}.
Sometimes it is useful to permit a particular DN to add or
remove itself from an attribute. For example, if you would like to
their own DN from the member attribute, you could accomplish
it with an access directive like this:
-> access to attr=member,entry
+> access to attrs=member,entry
> by dnattr=member selfwrite
The dnattr {{EX:<who>}} selector says that the access applies to
The following is an example configuration file, interspersed
with explanatory text. It defines two databases to handle
-different parts of the {{TERM:X.500}} tree; both are {{TERM:LDBM}}
+different parts of the {{TERM:X.500}} tree; both are {{TERM:BDB}}
database instances. The line numbers shown are provided for
reference only and are not included in the actual file. First, the
global configuration section:
E: 3. referral ldap://root.openldap.org
E: 4. access to * by * read
-Line 1 is a comment. Lines 2 include another config file
-which containing {{core}} schema definitions.
+Line 1 is a comment. Line 2 includes another config file
+which contains {{core}} schema definitions.
The {{EX:referral}} directive on line 3
means that queries not local to one of the databases defined
below will be referred to the LDAP server running on the
standard port (389) at the host {{EX:root.openldap.org}}.
-Line 4 is a global access control. It is used only if
-no database access controls match or when the target
-objects are not under the control of any database (such as
-the Root DSE).
+Line 4 is a global access control. It applies to all
+entries (after any applicable database-specific access
+controls).
-The next section of the configuration file defines an LDBM
+The next section of the configuration file defines a BDB
backend that will handle queries for things in the
"dc=example,dc=com" portion of the tree. The
database is to be replicated to two slave slapds, one on
-truelies, the other on judgmentday. Indexes are to be
+truelies, the other on judgmentday. Indices are to be
maintained for several attributes, and the {{EX:userPassword}}
attribute is to be protected from unauthorized access.
-E: 5. # ldbm definition for the example.com
-E: 6. database ldbm
-E: 7. suffix "dc=example, dc=com"
-E: 8. directory /usr/local/var/openldap
-E: 9. rootdn "cn=Manager, dc=example, dc=com"
+E: 5. # BDB definition for the example.com
+E: 6. database bdb
+E: 7. suffix "dc=example,dc=com"
+E: 8. directory /usr/local/var/openldap-data
+E: 9. rootdn "cn=Manager,dc=example,dc=com"
E: 10. rootpw secret
-E: 11. # replication directives
-E: 12. replogfile /usr/local/var/openldap/slapd.replog
-E: 13. replica host=slave1.example.com:389
-E: 14. binddn="cn=Replicator, dc=example, dc=com"
-E: 15. bindmethod=simple credentials=secret
-E: 16. replica host=slave2.example.com
-E: 17. binddn="cn=Replicator, dc=example, dc=com"
-E: 18. bindmethod=simple credentials=secret
-E: 19. # indexed attribute definitions
-E: 20. index uid pres,eq
-E: 21. index cn,sn,uid pres,eq,approx,sub
-E: 22. index objectClass eq
-E: 23. # ldbm access control definitions
-E: 24. access to attr=userPassword
-E: 25. by self write
-E: 26. by anonymous auth
-E: 27. by dn="cn=Admin,dc=example,dc=com" write
-E: 28. by * none
-E: 29. access to *
-E: 30. by self write
-E: 31. by anonymous auth
-E: 32. by dn="cn=Admin,dc=example,dc=com" write
-E: 33. by * read
-
-Line 5 is a comment. The start of the database definition is
-marked by the database keyword on line 6. Line 7 specifies
-the DN suffix for queries to pass to this database. Line 8
-specifies the directory in which the database files will live.
-
-Lines 9 and 10 identify the database "super user" entry and
-associated password. This entry is not subject to access
-control or size or time limit restrictions.
-
-Lines 11 through 18 are for replication. Line 11 specifies the
-replication log file (where changes to the database are logged
-\- this file is written by slapd and read by slurpd). Lines 12
-through 14 specify the hostname and port for a replicated
-host, the DN to bind as when performing updates, the bind
-method (simple) and the credentials (password) for the
-binddn. Lines 15 through 18 specify a second replication site.
-See the {{SECT:Replication with slurpd}} chapter for more
-information on these directives.
-
-Lines 20 through 22 indicate the indexes to maintain for
-various attributes.
-
-Lines 24 through 33 specify access control for entries in the
-database. For all entries, the {{EX:userPassword}} attribute is
-writable by the entry and the "admin" entry, may be used for
-authentication/authorization purposes, but is otherwise not
-readable. All other attributes by writable by the entry and
-the "admin" entry, may be used for authentication/authorization
-purposes, but may be read by authenticated users.
-
-The next section of the example configuration file defines
-another LDBM database. This one handles queries involving
-the {{EX:dc=example,dc=net}} subtree. Note that without
-line 38, the read access would be allowed due to the
-global access rule at line 4.
-
-E: 33. # ldbm definition for example.net
-E: 34. database ldbm
-E: 35. suffix "dc=example, dc=net"
-E: 36. directory /usr/local/var/ldbm-example-net
-E: 37. rootdn "cn=Manager, dc=example, dc=com"
-E: 38. access to * by users read
+E: 11. # indexed attribute definitions
+E: 12. index uid pres,eq
+E: 13. index cn,sn,uid pres,eq,approx,sub
+E: 14. index objectClass eq
+E: 15. # database access control definitions
+E: 16. access to attrs=userPassword
+E: 17. by self write
+E: 18. by anonymous auth
+E: 19. by dn.base="cn=Admin,dc=example,dc=com" write
+E: 20. by * none
+E: 21. access to *
+E: 22. by self write
+E: 23. by dn.base="cn=Admin,dc=example,dc=com" write
+E: 24. by * read
+
+Line 5 is a comment. The start of the database definition is marked
+by the database keyword on line 6. Line 7 specifies the DN suffix
+for queries to pass to this database. Line 8 specifies the directory
+in which the database files will live.
+
+Lines 9 and 10 identify the database {{super-user}} entry and associated
+password. This entry is not subject to access control or size or
+time limit restrictions.
+
+Lines 12 through 14 indicate the indices to maintain for various
+attributes.
+
+Lines 16 through 24 specify access control for entries in this
+database. As this is the first database, the controls also apply
+to entries not held in any database (such as the Root DSE). For
+all applicable entries, the {{EX:userPassword}} attribute is writable
+by the entry itself and by the "admin" entry. It may be used for
+authentication/authorization purposes, but is otherwise not readable.
+All other attributes are writable by the entry and the "admin"
+entry, but may be read by all users (authenticated or not).
+
+The next section of the example configuration file defines another
+BDB database. This one handles queries involving the
+{{EX:dc=example,dc=net}} subtree but is managed by the same entity
+as the first database. Note that without line 39, the read access
+would be allowed due to the global access rule at line 4.
+
+E: 33. # BDB definition for example.net
+E: 34. database bdb
+E: 35. suffix "dc=example,dc=net"
+E: 36. directory /usr/local/var/openldap-data-net
+E: 37. rootdn "cn=Manager,dc=example,dc=com"
+E: 38. index objectClass eq
+E: 39. access to * by users read