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slapd.conf (5)
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    NAME

    slapd.conf - configuration file for slapd, the stand-alone LDAP daemon
     
    

    SYNOPSIS

    /etc/openldap/slapd.conf  

    DESCRIPTION

    The file /etc/openldap/slapd.conf contains configuration information for the slapd(8) daemon. This configuration file is also used by the slurpd(8) replication daemon and by the SLAPD tools slapadd(8), slapcat(8), and slapindex(8).

    The slapd.conf file consists of a series of global configuration options that apply to slapd as a whole (including all backends), followed by zero or more database backend definitions that contain information specific to a backend instance.

    The general format of slapd.conf is as follows:

        # comment - these options apply to every database
        <global configuration options>
        # first database definition & configuration options
        database    <backend 1 type>
        <configuration options specific to backend 1>
        # subsequent database definitions & configuration options
        ...
    

    As many backend-specific sections as desired may be included. Global options can be overridden in a backend (for options that appear more than once, the last appearance in the slapd.conf file is used). Blank lines and comment lines beginning with a `#' character are ignored. If a line begins with white space, it is considered a continuation of the previous line.

    Arguments on configuration lines are separated by white space. If an argument contains white space, the argument should be enclosed in double quotes. If an argument contains a double quote (`"') or a backslash character (`\'), the character should be preceded by a backslash character.

    The specific configuration options available are discussed below in the Global Configuration Options, General Backend Options, General Database Options, LDBM Database-Specific Options, Shell Database-Specific Options, and Password Database-Specific Options sections. Refer to the "OpenLDAP Administrator's Guide" for more details on the slapd configuration file.  

    GLOBAL CONFIGURATION OPTIONS

    Options described in this section apply to all backends, unless specifically overridden in a backend definition. Arguments that should be replaced by actual text are shown in brackets <>.
    access to <what> [ by <who> <access> <control> ]+
    Grant access (specified by <access>) to a set of entries and/or attributes (specified by <what>) by one or more requestors (specified by <who>). See the "OpenLDAP's Administrator's Guide" for details.
    allow <features>
    Specify a set of features (separated by white space) to allow (default none). tls_2_anon allows Start TLS to force session to anonymous status (see also disallow tls_authc).
    argsfile <filename>
    The ( absolute ) name of a file that will hold the slapd server's command line options if started without the debugging command line option.
    attributetype ( <oid> [NAME <name>] [OBSOLETE]
     [DESC <description>] [SUP <oid>] [EQUALITY <oid>] [ORDERING <oid>] [SUBSTR <oid>] [SYNTAX <oidlen>] [SINGLE-VALUE] [COLLECTIVE] [NO-USER-MODIFICATION] [USAGE <attributeUsage>] )
    Specify an attribute type using the LDAPv3 syntax defined in RFC 2252. The slapd parser extends the RFC 2252 definition by allowing string forms as well as numeric OIDs to be used for the attribute OID and attribute syntax OID. (See the objectidentifier description.) Currently the syntax name parser is case-sensitive. The known syntax names are:
    AttributeTypeDescription Audio Binary BitString Certificate CertificateList CertificatePair DN DeliveryMethod DirectoryString DITContentRuleDescription DITStructureRuleDescription EnhancedGuide FacsimileTelephoneNumber GeneralizedTime Guide IA5String Integer MatchingRuleDescription MatchingRuleUseDescription MailPreference NameAndOptionalUUID NameFormDescription NumericString ObjectClassDescription OID OtherMailbox OctetString PostalAddress ProtocolInformation PresentationAddress PrintableString SupportedAlgorithm TelephoneNumber TeletexTerminalIdentifier TelexNumber UTCTime LDAPSyntaxDescription SubstringAssertion NISnetgrouptriple Bootparameter
    concurrency <integer>
    Specify a desired level of concurrency. Provided to the underlying thread system as a hint. The default is not to provide any hint.
    defaultaccess { none | auth | compare | search | read | write }
    Specify the default access level to grant requestors when no access directives were provided for the database. The default behavior is to grant 'read' access. It is recommended that access directives be used instead.
    defaultsearchbase <dn>
    Specify a default search base to use when client submits a non-base search request with an empty base DN.
    disallow <features>
    Specify a set of features (separated by white space) to disallow (default none). bind_v2 disables acceptance of LDAPv2 bind requests. bind_anon disables acceptance of anonymous bind requests. bind_anon_cred disables anonymous bind creditials are not empty (e.g. when DN is empty). bind_anon_dn disables anonymous bind when DN is not empty. bind_simple disables simple (bind) authentication. bind_krbv4 disables Kerberos V4 (bind) authentication. tls_authc disables StartTLS if authenticated (see also allow tls_2_anon).
    idletimeout <integer>
    Specify the number of seconds to wait before forcibly closing an idle client connections. A idletimeout of 0 disables this feature. The default is 0.
    include <filename>
    Read additional configuration information from the given file before continuing with the next line of the current file.
    loglevel <integer>
    Specify the level at which debugging statements and operation statistics should be syslogged (currently logged to the syslogd(8) LOG_LOCAL4 facility). Log levels are additive, and available levels are:
    1
    trace function calls
    2
    debug packet handling
    4
    heavy trace debugging
    8
    connection management
    16
    print out packets sent and received
    32
    search filter processing
    64
    configuration file processing
    128
    access control list processing
    256
    stats log connections/operations/results
    512
    stats log entries sent
    1024
    print communication with shell backends
    2048
    entry parsing
    objectclass ( <oid> [NAME <name>] [DESC <description] [OBSOLETE]
     [SUP <oids>] [{ ABSTRACT | STRUCTURAL | AUXILIARY }] [MUST <oids>] [MAY <oids>] )
    Specify an objectclass using the LDAPv3 syntax defined in RFC 2252. The slapd parser extends the RFC 2252 definition by allowing string forms as well as numeric OIDs to be used for the object class OID. (See the objectidentifier description.) Object classes are "STRUCTURAL" by default.
    objectidentifier <name> { <oid> | <name>[:<suffix>] }
    Define a string name that equates to the given OID. The string can be used in place of the numeric OID in objectclass and attribute definitions. The name can also be used with a suffix of the form ":xx" in which case the value "oid.xx" will be used.
    password-hash <hash>
    The <hash> to use for userPassword generation. One of {SSHA}, {SHA}, {SMD5}, {MD5}, and {CRYPT}. The default is {SSHA}.
    password-crypt-salt-format <format>
    Specify the format of the salt passed to crypt(3) when generating {CRYPT} passwords. This string needs to be in sprintf(3) format and may include one (and only one) %s conversion. This conversion will be substituted with a string random characters from [A-Za-z0-9./]. For example, "%.2s" provides a two character salt and "$1$%.8s" tells some versions of crypt(3) to use an MD5 algorithm and provides 8 random characters of salt. The default is "%s", which provides 31 characters of salt.
    pidfile <filename>
    The ( absolute ) name of a file that will hold the slapd server's process ID ( see getpid(2) ) if started without the debugging command line option.
    referral <url>
    Specify the referral to pass back when slapd(8) cannot find a local database to handle a request. If specified multiple times, each url is provided.
    require <conditions>
    Specify a set of conditions (separated by white space) to require (default none). The directive may be specified globally and/or per-database. bind requires bind operation prior to directory operations. LDAPv3 requires session to be using LDAP version 3. authc requires authentication prior to directory operations. SASL requires SASL authentication prior to directory operations. strong requires strong authentication prior to directory operations. Currently SASL and strong conditions are currently same. none may be used to require no conditions (useful for clearly globally set conditions within a particular database).
    sasl-host <fqdn>
    Used to specify the fully qualified domain name used for SASL processing.
    sasl-realm <realm>
    Specify SASL realm. Default is empty.
    sasl-secprops <properties>
    Used to specify Cyrus SASL security properties. The none flag (without any other properities) causes the flag properites default, "noanonymous,noplain", to be cleared. The noplain flag disables mechanisms susceptible to simple passive attacks. The noactive flag disables mechanisms susceptible to active attacks. The nodict flag disables mechanisms susceptible to passive dictionary attacks. The noanonyous flag disables mechanisms which support anonymous login. The forwardsec flag require forward secrecy between sessions. The passcred require mechanisms which pass client credentials (and allow mechanisms which can pass credentials to do so). The minssf=<factor> property specifies the minimum acceptable security strength factor as an integer approximate to effective key length used for encryption. 0 (zero) implies no protection, 1 implies integrity protection only, 56 allows DES or other weak ciphers, 112 allows triple DES and other strong ciphers, 128 allows RC4, Blowfish and other modern strong ciphers. The default is 0. The maxssf=<factor> property specifies the maximum acceptable security strength factor as an integer (see minssf description). The default is INT_MAX. The maxbufsize=<size> property specifies the maximum security layer receive buffer size allowed. 0 disables security layers. The default is 65536.
    schemacheck { on | off }
    Turn schema checking on or off. The default is on.
    security <factors>
    Specify a set of factors (separated by white space) to require. An integer value is associated with each factor and is roughly equivalent of the encryption key length to require. A value of 112 is equivalent to 3DES, 128 to Blowfish, etc.. The directive may be specified globally and/or per-database. ssf=<n> specifies the overall security strength factor. transport=<n> specifies the transport security strength factor. tls=<n> specifies the TLS security strength factor. sasl=<n> specifies the SASL security strength factor. update_ssf=<n> specifies the overall security strength factor to require for directory updates. update_transport=<n> specifies the transport security strength factor to require for directory updates. update_tls=<n> specifies the TLS security strength factor to require for directory updates. update_sasl=<n> specifies the SASL security strength factor to require for directory updates. Note that the transport factor is measure of security provided by the underlying transport, e.g. ldapi:// (and eventually IPSEC). It is not normally used.
    schemacheck { on | off }
    Turn schema checking on or off. The default is on.
    sizelimit <integer>
    Specify the maximum number of entries to return from a search operation. The default size limit is 500.
    sockbuf_max_incoming <integer>
    Specify the maximum incoming LDAP PDU size for anonymous sessions. The default is 262143.
    sockbuf_max_incoming_auth <integer>
    Specify the maximum incoming LDAP PDU size for authenticated sessions. The default is 4194303.
    srvtab <filename>
    Specify the srvtab file in which the kerberos keys necessary for authenticating clients using kerberos can be found. This option is only meaningful if you are using Kerberos authentication.
    threads <integer>
    Specify the maximum size of the primary thread pool. The default is 32.
    timelimit <integer>
    Specify the maximum number of seconds (in real time) slapd will spend answering a search request. The default time limit is 3600.
     

    TLS OPTIONS

    If slapd is build with support for Transport Layer Security, there are more options you can specify.
    TLSCipherSuite <cipher-suite-spec>
    Permits configuring what ciphers will be accepted and the preference order. <cipher-suite-spec> should be a cipher specification for OpenSSL. Example:

    TLSCipherSuite HIGH:MEDIUM:+SSLv2

    To check what ciphers a given spec selects, use:

    openssl ciphers -v <cipher-suite-spec>

    TLSCertificateFile <filename>
    Specifies the file that contains the slapd server certificate.
    TLSCertificateKeyFile <filename>
    Specifies the file that contains the slapd server private key that matches the certificate stored in the TLSCertificateFile file. Currently, the private key must not be protected with a password, so it is of critical importance that it is protected carefully.
    TLSRandFile <filename>
    Specifies the file to obtain random bits from when /dev/[u]random is not available. Generally set to the name of the EGD/PRNGD socket. The environment variable RANDFILE can also be used to specify the filename.
     

    GENERAL BACKEND OPTIONS

    Options in this section only apply to the configuration file section for the specified backend. They are supported by every type of backend.
    backend <databasetype>
    Mark the beginning of a backend definition. <databasetype> should be one of ldbm, shell, or passwd depending on which backend will serve the database.

     

    GENERAL DATABASE OPTIONS

    Options in this section only apply to the configuration file section for the database in which they are defined. They are supported by every type of backend.
    database <databasetype>
    Mark 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.
    lastmod on | off
    Controls whether slapd will automatically maintain the modifiersName, modifyTimestamp, creatorsName, and createTimestamp attributes for entries. By default, lastmod is on.
    readonly on | off
    This option puts the database into "read-only" mode. Any attempts to modify the database will return an "unwilling to perform" error. By default, readonly is off.
    replica host=<hostname>[:port] [tls=yes|critical] [suffix=<suffix> [...]] bindmethod=simple|sasl [binddn=<simple DN>] [credentials=<simple password>] [saslmech=<SASL mech>] [secopts=<options>] [realm=<realm>] [authcId=<authentication ID>] [authcId=<authentication ID>]
    Specify a replication site for this database. Refer to the "OpenLDAP Administrator's Guide" for detailed information on setting up a replicated slapd directory service. Zero or more suffix instances can be used to select the subtrees that will be replicated (defaults to all the database). A bindmethod of simple requires the options binddn and credentials and should only be used when adequate security services (e.g TLS or IPSEC) are in place. A bindmethod of sasl requires the option saslmech. If the mechanism will use Kerberos, a kerberos instance should be given in authcId.
    replogfile <filename>
    Specify the name of the replication log file to log changes to. The replication log is typically written by slapd(8) and read by slurpd(8). See slapd.replog(5) for more information. The specified file should be located in a directory with limited read/write/execute access as the replication logs may contain sensitive information.
    rootdn <dn>
    Specify the distinguished name that is not subject to access control or administrative limit restrictions for operations on this database. This DN may or may not be associated with an entry. An empty root DN (the default) specifies no root access is to be granted. It is recommended that the rootdn only be specified when needed (such as when initially populating a database). If the rootdn is within a namingContext (suffix) of the database, a simple bind password may also be provided using the rootpw directive.
    rootpw <password>
    Specify a password (or hash of the password) for the rootdn. If the rootdn is not within the namingContext of the database, the provided password is ignored. This option accepts all RFC 2307 userPassword formats known to the server (see password-hash desription) as well as cleartext. slappasswd(8) may be used to generate a hash of a password. Cleartext and {CRYPT} passwords are not recommended. If empty (the default), authentication of the root DN is by other means (e.g. SASL). Use of SASL is encouraged.
    suffix <dn suffix>
    Specify the DN suffix of queries that will be passed to this backend database. Multiple suffix lines can be given and at least one is required for each database definition.
    updatedn <dn>
    This option is only applicable in a slave slapd. It specifies the DN allowed to make changes to the replica (typically, this is the DN slurpd(8) binds as when making changes to the replica).
    updateref <url>
    Specify the referral to pass back when slapd(8) is asked to modify a replicated local database. If specified multiple times, each url is provided.
     

    LDBM DATABASE-SPECIFIC OPTIONS

    Options in this category only apply to the LDBM databases. That is, they must follow "database ldbm" line and come before any subsequent "backend" or "database" lines.
    cachesize <integer>
    Specify the size in entries of the in-memory cache maintained by the LDBM backend database instance. The default is 1000 entries.
    dbcachesize <integer>
    Specify the size in bytes of the in-memory cache associated with each open index file. If not supported by the underlying database method, this option is ignored without comment. The default is 100000 bytes.
    dbnolocking
    Specify that no database locking should be performed. Enabling this option may improve performance at the expense of data security. Do NOT run any slap tools while slapd is running.
    dbnosync
    Specify that on-disk database contents should not be immediately synchronized with in memory changes. Enabling this option may improve performance at the expense of data security.
    dbsync <frequency> <maxdelays> <delayinterval>
    Flush dirty database buffers to disk every <seconds> seconds. Implies dbnosync (ie. indvidual updates are no longer written to disk). It attempts to avoid syncs during periods of peak activity by waiting <delayinterval> seconds if the server is busy, repeating this delay up to <maxdelays> times before proceeding. It is an attempt to provide higher write performance with some amount of data security. Note that it may still be possible to get an inconsistent database if the underlying engine fills its cache and writes out individual pages and slapd crashes or is killed before the next sync. <maxdelays> and <delayinterval> are optional and default to 12 and 5 respectively, giving a total elapsed delay of 60 seconds before a sync will occur. <maxdelays> may be zero, and <delayinterval> must be 1 or greater.
    directory <directory>
    Specify the directory where the LDBM files containing this database and associated indexes live. A separate directory must be specified for each database. The default is //var/run/openldap-ldbm.
    index {<attrlist>|default} [pres,eq,approx,sub,<special>]
    Specify the indexes to maintain for the given attribute. If only an <attr> is given, the indices specified for default are maintained. A number of special index parameters may be specified. The index type sub can be decomposed into subinitial, subany, and subfinal indices. The special type lang may be specified to allow use of this index by language subtypes. The special type autolang may be specified to automatically maintain separate indices for each language subtypes. The special type subtypes may be specified to allow use of this index by named subtypes. The special type autosubtypes may be specified to automatically maintain separate indices for each other subtypes.
    mode <integer>
    Specify the file protection mode that newly created database index files should have. The default is 0600.
     

    SHELL DATABASE-SPECIFIC OPTIONS

    Options in this category only apply to the SHELL backend database. That is, they must follow a "database shell" line and come before any subsequent "backend" or "database" lines. The Shell backend executes external programs to implement operations, and is designed to make it easy to tie an existing database to the slapd front-end.
    bind <pathname>
    unbind <pathname>
    search <pathname>
    compare <pathname>
    modify <pathname>
    modrdn <pathname>
    add <pathname>
    delete <pathname>
    abandon <pathname>
    These options specify the pathname of the command to execute in response to the given LDAP operation.

    Note that you need only supply configuration lines for those commands you want the backend to handle. Operations for which a command is not supplied will be refused with an "unwilling to perform" error.  

    PASSWORD DATABASE-SPECIFIC OPTIONS

    Options in this category only apply to the PASSWD backend database. That is, they must follow a "database passwd" line and come before any subsequent "backend" or "database" lines. The PASSWD database serves up the user account information listed in the system passwd(5) file.
    file <filename>
    Specifies an alternate passwd file to use. The default is /etc/passwd.
     

    EXAMPLE

    "OpenLDAP Administrator's Guide" contains an annotated example of a configuration file.  

    FILES

    /etc/openldap/slapd.conf  

    SEE ALSO

    ldap(3), slapd.replog(5), locale(5), passwd(5), slapd(8), slapadd(8), slapcat(8), slapindex(8), slappassword(8), slurpd(8),

    "OpenLDAP Administrator's Guide" (http://www.OpenLDAP.org/doc/admin/)  

    ACKNOWLEDGEMENTS

    is developed and maintained by The OpenLDAP Project (http://www.openldap.org/). is derived from University of Michigan LDAP 3.3 Release.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    GLOBAL CONFIGURATION OPTIONS
    TLS OPTIONS
    GENERAL BACKEND OPTIONS
    GENERAL DATABASE OPTIONS
    LDBM DATABASE-SPECIFIC OPTIONS
    SHELL DATABASE-SPECIFIC OPTIONS
    PASSWORD DATABASE-SPECIFIC OPTIONS
    EXAMPLE
    FILES
    SEE ALSO
    ACKNOWLEDGEMENTS


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