slapd−config — configuration backend to slapd
ETCDIR/slapd.d
The config
backend manages all of the configuration information for the
slapd(8) daemon. This
configuration information is also used by the SLAPD tools
slapacl(8), slapadd(8), slapauth(8), slapcat(8), slapdn(8), slapindex(8), slapmodify(8), and
slaptest(8).
The config
backend is backward compatible with the older slapd.conf(5) file but
provides the ability to change the configuration dynamically
at runtime. If slapd is run with only a slapd.conf
file dynamic
changes will be allowed but they will not persist across a
server restart. Dynamic changes are only saved when slapd is
running from a slapd.d
configuration
directory.
Unlike other backends, there can only be one instance of
the config
backend,
and most of its structure is predefined. The root of the
database is hardcoded to cn=config
and this root entry
contains global settings for slapd. Multiple child entries
underneath the root entry are used to carry various other
settings:
- cn=Module
dynamically loaded modules
- cn=Schema
schema definitions
- lcBackend=xxx
backend-specific settings
- lcDatabase=xxx
database-specific settings
The cn=Module
entries will only appear in configurations where slapd was
built with support for dynamically loaded modules. There can
be multiple entries, one for each configured module path.
Within each entry there will be values recorded for each
module loaded on a given path. These entries have no
children.
The cn=Schema
entry contains all of the hardcoded schema elements. The
children of this entry contain all user-defined schema
elements. In schema that were loaded from include files, the
child entry will be named after the include file from which
the schema was loaded. Typically the first child in this
subtree will be cn=core,cn=schema,cn=config
.
olcBackend
entries are for storing settings specific to a single backend
type (and thus global to all database instances of that
type). At present there are no backends that implement
settings of this nature, so usually there will not be any
olcBackend entries.
olcDatabase
entries store settings specific to a single database
instance. These entries may have olcOverlay
child entries
corresponding to any overlays configured on the database. The
olcDatabase and olcOverlay entries may also have
miscellaneous child entries for other settings as needed.
There are two special database entries that are predefined
− one is an entry for the config database itself, and
the other is for the "frontend" database. Settings in the
frontend database are inherited by the other databases,
unless they are explicitly overridden in a specific
database.
The specific configuration options available are discussed
below in the Global Configuration Options, General Backend
Options, and General Database Options. Options are set by
defining LDAP attributes with specific values. In general the
names of the LDAP attributes are the same as the
corresponding slapd.conf
keyword, with an
"olc" prefix added on.
The parser for many of these attributes is the same as used for parsing the slapd.conf keywords. As such, slapd.conf keywords that allow multiple items to be specified on one line, separated by whitespace, will allow multiple items to be specified in one attribute value. However, when reading the attribute via LDAP, the items will be returned as individual attribute values.
Backend-specific options are discussed in the slapd−<backend>(5)
manual pages. Refer to the "OpenLDAP Administrator's Guide"
for more details on configuring slapd.
Options described in this section apply to the server as a whole. Arguments that should be replaced by actual text are shown in brackets <>.
These options may only be specified in the cn=config
entry. This entry
must have an objectClass of olcGlobal
.
Specify a set of features to allow (default none).
bind_v2
allows acceptance of LDAPv2 bind requests. Note that
slapd(8) does not
truly implement LDAPv2 (RFC 1777), now Historic (RFC
3494). bind_anon_cred
allows
anonymous bind when credentials are not empty (e.g.
when DN is empty). bind_anon_dn
allows
unauthenticated (anonymous) bind when DN is not empty.
update_anon
allows unauthenticated (anonymous) update operations to
be processed (subject to access controls and other
administrative limits). proxy_authz_anon
allows
unauthenticated (anonymous) proxy authorization control
to be processed (subject to access controls,
authorization and other administrative limits).
The (absolute) name of a file that will hold the
slapd
server's command line (program name and options).
Define tagging attribute options or option tag/range
prefixes. Options must not end with `−', prefixes
must end with `−'. The `lang−' prefix is
predefined. If you use the olcAttributeOptions
directive, `lang−' will no longer be defined and
you must specify it explicitly if you want it
defined.
An attribute description with a tagging option is a subtype of that attribute description without the option. Except for that, options defined this way have no special semantics. Prefixes defined this way work like the `lang−' options: They define a prefix for tagging options starting with the prefix. That is, if you define the prefix `x−foo−', you can use the option `x−foo−bar'. Furthermore, in a search or compare, a prefix or range name (with a trailing `−') matches all options starting with that name, as well as the option with the range name sans the trailing `−'. That is, `x−foo−bar−' matches `x−foo−bar' and `x−foo−bar−baz'.
RFC 4520 reserves options beginning with `x−' for private experiments. Other options should be registered with IANA, see RFC 4520 section 3.5. OpenLDAP also has the `binary' option built in, but this is a transfer option, not a tagging option.
Used by the authentication framework to convert
simple user names to an LDAP DN used for authorization
purposes. Its purpose is analogous to that of
olcAuthzRegexp
(see below). The rewrite−rule
is a
set of rules analogous to those described in slapo-rwm(5) for data
rewriting (after stripping the rwm−
prefix).
olcAuthIDRewrite
and
olcAuthzRegexp
should
not be intermixed.
Used to specify which rules to use for Proxy
Authorization. Proxy authorization allows a client to
authenticate to the server using one user's
credentials, but specify a different identity to use
for authorization and access control purposes. It
essentially allows user A to login as user B, using
user A's password. The none
flag disables
proxy authorization. This is the default setting. The
from
flag
will use rules in the authzFrom
attribute of
the authorization DN. The to
flag will use rules
in the authzTo
attribute of
the authentication DN. The any
flag, an alias for
the deprecated value of both
, will allow any of
the above, whatever succeeds first (checked in
to
,
from
sequence. The all
flag requires both
authorizations to succeed.
The rules are mechanisms to specify which identities are allowed to perform proxy authorization. The
authzFrom
attribute in an entry specifies which other users are allowed to proxy login to this entry. TheauthzTo
attribute in an entry specifies which other users this user can authorize as. Use ofauthzTo
rules can be easily abused if users are allowed to write arbitrary values to this attribute. In general theauthzTo
attribute must be protected with ACLs such that only privileged users can modify it. The value ofauthzFrom
andauthzTo
describes anidentity
or a set of identities; it can take five forms:
- ldap:///<base>??[<scope>]?<filter>
dn[.<dnstyle>]:<pattern>
u[.<mech>[<realm>]]:<pattern>
group[/objectClass[/attributeType]]:<pattern>
<pattern>
<dnstyle>:={exact|onelevel|children|subtree|regex}
The first form is a valid LDAP
URI
where the<host>:<port>
, the<attrs>
and the<extensions>
portions must be absent, so that the search occurs locally on eitherauthzFrom
orauthzTo
.The second form is a
DN
, with the optional style modifiersexact
,onelevel
,children
, andsubtree
for exact, onelevel, children and subtree matches, which cause<pattern>
to be normalized according to the DN normalization rules, or the special regex style, which causes the<pattern>
to be treated as a POSIX (''extended'') regular expression, as discussed in regex(7) and/or re_format(7). A pattern of*
means any non-anonymous DN.The third form is a SASL
id
, with the optional fields<mech>
and<realm>
that allow to specify a SASLmechanism
, and eventually a SASLrealm
, for those mechanisms that support one. The need to allow the specification of a mechanism is still debated, and users are strongly discouraged to rely on this possibility.The fourth form is a group specification. It consists of the keyword
group
, optionally followed by the specification of the groupobjectClass
andattributeType
. TheobjectClass
defaults togroupOfNames
. TheattributeType
defaults tomember
. The group with DN<pattern>
is searched with base scope, filtered on the specifiedobjectClass
. The values of the resultingattributeType
are searched for the asserted DN.The fifth form is provided for backwards compatibility. If no identity type is provided, i.e. only
<pattern>
is present, an exact DN is assumed; as a consequence,<pattern>
is subjected to DN normalization.Since the interpretation of
authzFrom
andauthzTo
can impact security, users are strongly encouraged to explicitly set the type of identity specification that is being used. A subset of these rules can be used as third arg in theolcAuthzRegexp
statement (see below); significantly, theURI
, provided it results in exactly one entry, and thedn.exact:<dn>
forms.
Used by the authentication framework to convert
simple user names, such as provided by SASL subsystem,
or extracted from certificates in case of cert-based
SASL EXTERNAL, or provided within the RFC 4370 "proxied
authorization" control, to an LDAP DN used for
authorization purposes. Note that the resulting DN need
not refer to an existing entry to be considered valid.
When an authorization request is received from the SASL
subsystem, the SASL USERNAME
, REALM
, and MECHANISM
are taken, when available,
and combined into a name of the form
- UID=<username>[[,CN=<realm>],CN=<mechanism>],CN=auth
This name is then compared against the
match
POSIX (''extended'') regular expression, and if the match is successful, the name is replaced with thereplace
string. If there are wildcard strings in thematch
regular expression that are enclosed in parenthesis, e.g.
- UID=([^,]*),CN=.*
then the portion of the name that matched the wildcard will be stored in the numbered placeholder variable $1. If there are other wildcard strings in parenthesis, the matching strings will be in $2, $3, etc. up to $9. The placeholders can then be used in the
replace
string, e.g.
UID=$1,OU=Accounts,DC=example,DC=com
The replaced name can be either a DN, i.e. a string prefixed by "dn:", or an LDAP URI. If the latter, the server will use the URI to search its own database(s) and, if the search returns exactly one entry, the name is replaced by the DN of that entry. The LDAP URI must have no hostport, attrs, or extensions components, but the filter is mandatory, e.g.
ldap:///OU=Accounts,DC=example,DC=com??one?
(UID=$1
)The protocol portion of the URI must be strictly ldap. Note that this search is subject to access controls. Specifically, the authentication identity must have "auth" access in the subject.
Multiple
olcAuthzRegexp
values can be specified to allow for multiple matching and replacement patterns. The matching patterns are checked in the order they appear in the attribute, stopping at the first successful match.
Specify a desired level of concurrency. Provided to the underlying thread system as a hint. The default is not to provide any hint. This setting is only meaningful on some platforms where there is not a one to one correspondence between user threads and kernel threads.
Specify the maximum number of pending requests for an anonymous session. If requests are submitted faster than the server can process them, they will be queued up to this limit. If the limit is exceeded, the session is closed. The default is 100.
Specify the maximum number of pending requests for an authenticated session. The default is 1000.
Specify a set of features to disallow (default
none). bind_anon
disables
acceptance of anonymous bind requests. Note that this
setting does not prohibit anonymous directory access
(See "require authc"). bind_simple
disables
simple (bind) authentication. tls_2_anon
disables
forcing session to anonymous status (see also
tls_authc
)
upon StartTLS operation receipt. tls_authc
disallows the
StartTLS operation if authenticated (see also
tls_2_anon
).
proxy_authz_non_critical
disables acceptance of the proxied authorization
control (RFC4370) with criticality set to FALSE.
dontusecopy_non_critical
disables acceptance of the dontUseCopy control (a work
in progress) with criticality set to FALSE.
A SIGHUP signal will only cause a 'gentle'
shutdown-attempt: Slapd
will stop
listening for new connections, but will not close the
connections to the current clients. Future write
operations return unwilling-to-perform, though. Slapd
terminates when all clients have closed their
connections (if they ever do), or − as before
− if it receives a SIGTERM signal. This can be
useful if you wish to terminate the server and start a
new slapd
server with another
database, without disrupting the currently
active clients. The default is FALSE. You may wish to
use olcIdleTimeout
along
with this option.
Specify the number of seconds to wait before
forcibly closing an idle client connection. A setting
of 0 disables this feature. The default is 0. You may
also want to set the olcWriteTimeout
option.
Use a 64 bit hash for indexing. The default is to use 32 bit hashes. These hashes are used for equality and substring indexing. The 64 bit version may be needed to avoid index collisions when the number of indexed values exceeds ~64 million. (Note that substring indexing generates multiple index values per actual attribute value.) Indices generated with 32 bit hashes are incompatible with the 64 bit version, and vice versa. Any existing databases must be fully reloaded when changing this setting. This directive is only supported on 64 bit CPUs.
Specify the key length for ordered integer indices. The most significant bytes of the binary integer will be used for index keys. The default value is 4, which provides exact indexing for 31 bit values. A floating point representation is used to index too large values.
Specify the maximum length for subinitial and subfinal indices. Only this many characters of an attribute value will be processed by the indexing functions; any excess characters are ignored. The default is 4.
Specify the minimum length for subinitial and subfinal indices. An attribute value must have at least this many characters in order to be processed by the indexing functions. The default is 2.
Specify the length used for subany indices. An
attribute value must have at least this many characters
in order to be processed. Attribute values longer than
this length will be processed in segments of this
length. The default is 4. The subany index will also be
used in subinitial and subfinal index lookups when the
filter string is longer than the olcIndexSubstrIfMaxlen
value.
Specify the steps used in subany index lookups. This value sets the offset for the segments of a filter string that are processed for a subany index lookup. The default is 2. For example, with the default values, a search using this filter "cn=*abcdefgh*" would generate index lookups for "abcd", "cdef", and "efgh".
Note | |
---|---|
Indexing support depends on the particular backend in use. Also, changing these settings will generally require deleting any indices that depend on these parameters and recreating them with slapindex(8). |
Specify the number of threads to use for the connection manager. The default is 1 and this is typically adequate for up to 16 CPU cores. The value should be set to a power of 2.
Specifies the Security Strength Factor (SSF) to be
given local LDAP sessions, such as those to the
ldapi:// listener. For a description of SSF values, see
olcSaslSecProps
's
minssf
option
description. The default is 71.
Specify a file for recording slapd debug messages.
By default these messages only go to stderr, are not
recorded anywhere else, and are unrelated to messages
exposed by the loglevel
configuration
parameter. Specifying a logfile copies messages to both
stderr and the logfile.
Specify the level at which debugging statements and operation statistics should be syslogged (currently logged to the syslogd(8) LOG_LOCAL4 facility). They must be considered subsystems rather than increasingly verbose log levels. Some messages with higher priority are logged regardless of the configured loglevel as soon as any logging is configured. Log levels are additive, and available levels are:
1
(0x1 trace) trace function calls
2
(0x2 packets) debug packet handling
4
(0x4 args) heavy trace debugging (function args)
8
(0x8 conns) connection management
16
(0x10 BER) print out packets sent and received
32
(0x20 filter) search filter processing
64
(0x40 config) configuration file processing
128
(0x80 ACL) access control list processing
256
(0x100 stats) connections, LDAP operations, results (recommended)
512
(0x200 stats2) stats2 log entries sent
1024
(0x400 shell) print communication with shell backends
2048
(0x800 parse) entry parsing
16384
(0x4000 sync) LDAPSync replication
32768
(0x8000 none) only messages that get logged whatever log level is set
The desired log level can be input as a single integer that combines the (ORed) desired levels, both in decimal or in hexadecimal notation, as a list of integers (that are ORed internally), or as a list of the names that are shown between parenthesis, such that
olcLogLevel: 129 olcLogLevel: 0x81 olcLogLevel: 128 1 olcLogLevel: 0x80 0x1 olcLogLevel: acl traceare equivalent. The keyword
any
can be used as a shortcut to enable logging at all levels (equivalent to −1). The keywordnone
, or the equivalent integer representation, causes those messages that are logged regardless of the configured olcLogLevel to be logged. In fact, if no olcLogLevel (or a 0 level) is defined, no logging occurs, so at least thenone
level is required to have high priority messages logged.Note that the
packets
,BER
, andparse
levels are only available as debug output on stderr, and are not sent to syslog.This setting defaults to
stats
. This level should usually also be included when using other loglevels, to help analyze the logs.
Specify the maximum depth of nested filters in search requests. The default is 1000.
Specify the format of the salt passed to crypt(3) when
generating {CRYPT} passwords (see olcPasswordHash
) during
processing of LDAP Password Modify Extended Operations
(RFC 3062).
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 of 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.
The (absolute) name of a file that will hold the
slapd
server's process ID (see getpid(2)).
The ( absolute ) name of a file that will contain
log messages from SLAPI
plugins. See slapd.plugin(5) for
details.
Specify the referral to pass back when slapd(8) cannot find a local database to handle a request. If multiple values are specified, each url is provided.
Enable/disable client name unverified reverse lookup
(default is FALSE
if
compiled with −−enable−rlookups).
Specify the name of an LDIF(5) file containing user defined attributes for the root DSE. These attributes are returned in addition to the attributes normally produced by slapd.
The root DSE is an entry with information about the server and its capabilities, in operational attributes. It has the empty DN, and can be read with e.g.:
ldapsearch −x −b "" −s base "+"
See RFC 4512 section 5.1 for details.
Specify which auxprop plugins to use for authentication lookups. The default is empty, which just uses slapd's internal support. Usually no other auxprop plugins are needed.
Specify which attribute(s) should be subject to the don't use copy control. This is necessary for some SASL mechanisms such as OTP to work in a replicated environment. The attribute "cmusaslsecretOTP" is the default value.
Used to disable replication of the attribute(s) defined by olcSaslAuxpropsDontUseCopy and instead use a local value for the attribute. This allows the SASL mechanism to continue to work if the provider is offline. This can cause replication inconsistency. Defaults to FALSE.
Used to specify the fully qualified domain name used for SASL processing.
Specify SASL realm. Default is empty.
Specify the channel-binding type, see also LDAP_OPT_X_SASL_CBINDING. Default is none.
Used to specify Cyrus SASL security properties. The
none
flag
(without any other properties) causes the flag
properties 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 noanonymous
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, 128 allows RC4, Blowfish and
other similar ciphers, 256 will require modern 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.
Specify an integer ID from 0 to 4095 for this server. The ID may also be specified as a hexadecimal ID by prefixing the value with "0x". Non-zero IDs are required when using multi-provider replication and each provider must have a unique non-zero ID. Note that this requirement also applies to separate providers contributing to a glued set of databases. If the URL is provided, this directive may be specified multiple times, providing a complete list of participating servers and their IDs. The fully qualified hostname of each server should be used in the supplied URLs. The IDs are used in the "replica id" field of all CSNs generated by the specified server. The default value is zero, which is only valid for single provider replication. Example:
olcServerID: 1 ldap://ldap1.example.com olcServerID: 2 ldap://ldap2.example.com
Specify the maximum incoming LDAP PDU size for anonymous sessions. The default is 262143.
Specify the maximum incoming LDAP PDU size for authenticated sessions. The default is 4194303.
Specify the size of the TCP buffer. A global value for both read and write TCP buffers related to any listener is defined, unless the listener is explicitly specified, or either the read or write qualifiers are used. See tcp(7) for details. Note that some OS-es implement automatic TCP buffer tuning.
Specify the maximum size of the primary thread pool. The default is 16; the minimum value is 2.
Specify the number of work queues to use for the primary thread pool. The default is 1 and this is typically adequate for up to 8 CPU cores. The value should not exceed the number of CPUs in the system.
Specify the maximum number of threads to use in tool mode. This should not be greater than the number of CPUs in the system. The default is 1.
Specify the number of seconds to wait before forcibly closing a connection with an outstanding write. This allows recovery from various network hang conditions. A setting of 0 disables this feature. The default is 0.
If slapd
is
built with support for Transport Layer Security, there are
more options you can specify.
Permits configuring what ciphers will be accepted and the preference order. <cipher-suite-spec> should be a cipher specification for the TLS library in use (OpenSSL or GnuTLS). Example:
OpenSSL:
olcTLSCipherSuite: HIGH:MEDIUM:+SSLv2
GnuTLS:
olcTLSCiphersuite: SECURE256:!AES-128-CBC
To check what ciphers a given spec selects in OpenSSL, use:
openssl ciphers −v <cipher-suite-spec>With GnuTLS the available specs can be found in the manual page of gnutls-cli(1) (see the description of the option
−−priority
).In older versions of GnuTLS, where gnutls−cli does not support the option −−priority, you can obtain the — more limited — list of ciphers by calling:
gnutls−cli −l
Specifies the file that contains certificates for
all of the Certificate Authorities that slapd
will recognize.
The certificate for the CA that signed the server
certificate must be included among these certificates.
If the signing CA was not a top-level (root) CA,
certificates for the entire sequence of CA's from the
signing CA to the top-level CA should be present.
Multiple certificates are simply appended to the file;
the order is not significant.
Specifies the path of a directory that contains Certificate Authority certificates in separate individual files. Usually only one of this or the olcTLSCACertificateFile is defined. If both are specified, both locations will be used.
Specifies the file that contains the slapd
server
certificate.
When using OpenSSL that file may also contain any number of intermediate certificates after the server certificate.
Specifies the file that contains the slapd
server private
key that matches the certificate stored in the
olcTLSCertificateFile
file. If the private key is protected with a password,
the password must be manually typed in when slapd
starts. Usually the private key is not protected with a
password, to allow slapd to start without manual
intervention, so it is of critical importance that the
file is protected carefully.
This directive specifies the file that contains parameters for Diffie-Hellman ephemeral key exchange. This is required in order to use a DSA certificate on the server, or an RSA certificate missing the "key encipherment" key usage. Note that setting this option may also enable Anonymous Diffie-Hellman key exchanges in certain non-default cipher suites. Anonymous key exchanges should generally be avoided since they provide no actual client or server authentication and provide no protection against man-in-the-middle attacks. You should append "!ADH" to your cipher suites to ensure that these suites are not used.
Specify the name of the curve(s) to use for Elliptic curve Diffie-Hellman ephemeral key exchange. This option is only used for OpenSSL. This option is not used with GnuTLS; the curves may be chosen in the GnuTLS ciphersuite specification.
Specifies minimum SSL/TLS protocol version that will be negotiated. If the server doesn't support at least that version, the SSL handshake will fail. To require TLS 1.x or higher, set this option to 3.(x+1), e.g.,
olcTLSProtocolMin: 3.2
would require TLS 1.1. Specifying a minimum that is higher than that supported by the OpenLDAP implementation will result in it requiring the highest level that it does support. This directive is ignored with GnuTLS.
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. This directive is ignored with GnuTLS.
Specifies what checks to perform on client
certificates in an incoming TLS session, if any. The
<level>
can be specified as one of the following keywords:
never
This is the default.
slapd
will not ask the client for a certificate.allow
The client certificate is requested. If no certificate is provided, the session proceeds normally. If a bad certificate is provided, it will be ignored and the session proceeds normally.
try
The client certificate is requested. If no certificate is provided, the session proceeds normally. If a bad certificate is provided, the session is immediately terminated.
- demand | hard | true
These keywords are all equivalent, for compatibility reasons. The client certificate is requested. If no certificate is provided, or a bad certificate is provided, the session is immediately terminated.
Note that a valid client certificate is required in order to use the SASL EXTERNAL authentication mechanism with a TLS session. As such, a non-default
olcTLSVerifyClient
setting must be chosen to enable SASL EXTERNAL authentication.
Specifies if the Certificate Revocation List (CRL)
of the CA should be used to verify if the client
certificates have not been revoked. This requires
olcTLSCACertificatePath
parameter to be set. This parameter is ignored with
GnuTLS. <level>
can be
specified as one of the following keywords:
none
No CRL checks are performed
peer
Check the CRL of the peer certificate
all
Check the CRL for a whole certificate chain
Specifies a file containing a Certificate Revocation List to be used for verifying that certificates have not been revoked. This parameter is only valid when using GnuTLS.
If slapd
is
compiled with −−enable−modules then the
module-related entries will be available. These entries are
named cn=module{x},cn=config
and
must have the olcModuleList objectClass. One entry should be
created per olcModulePath.
Normally the
config engine generates the "{x}" index in the RDN
automatically, so it can be omitted when initially loading
these entries.
Specify the name of a dynamically loadable module to
load and any additional arguments if supported by the
module. The filename may be an absolute path name or a
simple filename. Non-absolute names are searched for in
the directories specified by the olcModulePath
option.
Specify a list of directories to search for loadable modules. Typically the path is colon-separated but this depends on the operating system. The default is MODULEDIR, which is where the standard OpenLDAP install will place its modules.
Schema definitions are created as entries in the
cn=schema,cn=config
subtree. These entries must have the olcSchemaConfig
objectClass. As noted above, the actual cn=schema,cn=config
entry is
predefined and any values specified for it are ignored.
olcAttributetypes: ( <oid> [NAME <name>] [DESC <description>] [OBSOLETE] [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 4512. The slapd parser extends the RFC 4512 definition by allowing string forms as well as numeric OIDs to be used for the attribute OID and attribute syntax OID. (See the
olcObjectIdentifier
description.)
olcDitContentRules: ( <oid> [NAME <name>] [DESC <description>] [OBSOLETE] [AUX <oids>] [MUST <oids>] [MAY <oids>] [NOT <oids>] )
Specify an DIT Content Rule using the LDAPv3 syntax defined in RFC 4512. The slapd parser extends the RFC 4512 definition by allowing string forms as well as numeric OIDs to be used for the attribute OID and attribute syntax OID. (See the
olcObjectIdentifier
description.)
olcLdapSyntaxes ( <oid> [DESC <description>] [X−SUBST <substitute-syntax>] )
Specify an LDAP syntax using the LDAPv3 syntax defined in RFC 4512. The slapd parser extends the RFC 4512 definition by allowing string forms as well as numeric OIDs to be used for the syntax OID. (See the
objectidentifier
description.) The slapd parser also honors theX−SUBST
extension (an OpenLDAP-specific extension), which allows one to use theolcLdapSyntaxes
attribute to define a non-implemented syntax along with another syntax, the extension valuesubstitute-syntax
, as its temporary replacement. Thesubstitute-syntax
must be defined. This allows one to define attribute types that make use of non-implemented syntaxes using the correct syntax OID. UnlessX−SUBST
is used, this configuration statement would result in an error, since no handlers would be associated to the resulting syntax structure.
olcObjectClasses: ( <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 4512. The slapd parser extends the RFC 4512 definition by allowing string forms as well as numeric OIDs to be used for the object class OID. (See the
olcObjectIdentifier
description.) Object classes are "STRUCTURAL" by default.
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.
Options in these entries only apply to the configuration
of a single type of backend. All backends may support this
class of options, but currently only back-mdb does. The entry
must be named olcBackend=<databasetype>,cn=config
and must have the olcBackendConfig objectClass.
<databasetype> should be one of asyncmeta
, config
, dnssrv
, ldap, ldif
, mdb
, meta
, monitor
, ndb
, null
, passwd
, perl
, relay
, sock
, sql
, or wt
. At present, only back-mdb
implements any options of this type, so this entry should not
be used for any other backends.
Database options are set in entries named olcDatabase={x}<databasetype>,cn=config
and must have the olcDatabaseConfig objectClass. Normally the
config engine generates the "{x}" index in the RDN
automatically, so it can be omitted when initially loading
these entries.
The special frontend database is always numbered "{−1}" and the config database is always numbered "{0}".
Options in this section may be set in the special
"frontend" database and inherited in all the other databases.
These options may be altered by further settings in each
specific database. The frontend entry must be named
olcDatabase=frontend,cn=config
and must have the olcFrontendConfig objectClass.
Grant access (specified by <access>) to a set of entries and/or attributes (specified by <what>) by one or more requestors (specified by <who>). If no access controls are present, the default policy allows anyone and everyone to read anything but restricts updates to rootdn. (e.g., "olcAccess: to * by * read"). See slapd.access(5) and the "OpenLDAP Administrator's Guide" for details.
Access controls set in the frontend are appended to any access controls set on the specific databases. The rootdn of a database can always read and write EVERYTHING in that database.
Extra special care must be taken with the access controls on the config database. Unlike other databases, the default policy for the config database is to only allow access to the rootdn. Regular users should not have read access, and write access should be granted very carefully to privileged administrators.
Specify a default search base to use when client submits a non-base search request with an empty base DN. Base scoped search requests with an empty base DN are not affected. This setting is only allowed in the frontend entry.
Lists what attributes need to be added to search
requests. Local storage backends return the entire
entry to the frontend. The frontend takes care of only
returning the requested attributes that are allowed by
ACLs. However, features like access checking and so may
need specific attributes that are not automatically
returned by remote storage backends, like proxy
backends and so on. <attr>
is an
attribute that is needed for internal purposes and thus
always needs to be collected, even when not explicitly
requested by clients. This attribute is
multi-valued.
This option configures one or more hashes to be used
in generation of user passwords stored in the
userPassword attribute during processing of LDAP
Password Modify Extended Operations (RFC 3062). The
<hash> must be one of {SSHA}
, {SHA}
, {SMD5}
, {MD5}
, {CRYPT}
, and {CLEARTEXT}
. The
default is {SSHA}
.
{SHA}
and
{SSHA}
use
the SHA-1 algorithm (FIPS 160-1), the latter with a
seed.
{MD5}
and
{SMD5}
use
the MD5 algorithm (RFC 1321), the latter with a
seed.
{CRYPT}
uses the crypt(3).
{CLEARTEXT}
indicates
that the new password should be added to userPassword
as clear text.
Note that this option does not alter the normal user applications handling of userPassword during LDAP Add, Modify, or other LDAP operations. This setting is only allowed in the frontend entry.
This option puts the database into "read-only" mode. Any attempts to modify the database will return an "unwilling to perform" error. By default, olcReadOnly is FALSE. Note that when this option is set TRUE on the frontend, it cannot be reset without restarting the server, since further writes to the config database will be rejected.
Specify a set of conditions to require (default
none). The directive may be specified globally and/or
per-database; databases inherit global conditions, so
per-database specifications are additive. 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. The strong keyword allows protected
"simple" authentication as well as SASL authentication.
none
may be
used to require no conditions (useful to clear out
globally set conditions within a particular database);
it must occur first in the list of conditions.
Specify a list of operations that are restricted.
Restrictions on a specific database override any
frontend setting. Operations can be any of add
, bind
, compare
, delete
, extended[=<OID>]
,
modify
,
rename
,
search
, or
the special pseudo-operations read
and write
, which
respectively summarize read and write operations. The
use of restrict
write is equivalent to olcReadOnly: TRUE (see
above). The extended
keyword allows
one to indicate the OID of the specific operation to be
restricted.
Specify the distinguished name for the subschema subentry that controls the entries on this server. The default is "cn=Subschema".
Specify a set of security strength factors
(separated by white space) to require (see olcSaslSecprops
's
minssf
option
for a description of security strength factors). 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. simple_bind=<n>
specifies the security strength factor required for
simple
username/password authentication. 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.
Specify the maximum number of entries to return from
a search operation. The default size limit is 500. Use
unlimited
to
specify no limits. The second format allows a fine
grain setting of the size limits. If no special
qualifiers are specified, both soft and hard limits are
set. Extra args can be added in the same value.
Additional qualifiers are available; see olcLimits
for an
explanation of all of the different flags.
Specify a list of multi-valued attributes whose values will always be maintained in sorted order. Using this option will allow Modify, Compare, and filter evaluations on these attributes to be performed more efficiently. The resulting sort order depends on the attributes' syntax and matching rules and may not correspond to lexical order or any other recognizable order. This setting is only allowed in the frontend entry.
Specify the maximum number of seconds (in real time)
slapd
will
spend answering a search request. The default time
limit is 3600. Use unlimited
to specify no
limits. The second format allows a fine grain setting
of the time limits. Extra args can be added in the same
value. See olcLimits
for an
explanation of the different flags.
Options in this section only apply to the specific database for which they are defined. They are supported by every type of backend. All of the Global Database Options may also be used here.
Controls whether Add operations will perform ACL checks on the content of the entry being added. This check is off by default. See the slapd.access(5) manual page for more details on ACL requirements for Add operations.
Controls whether the database will be used to answer queries. A database that is hidden will never be selected to answer any queries, and any suffix configured on the database will be ignored in checks for conflicts with other databases. By default, olcHidden is FALSE.
Controls whether slapd
will
automatically maintain the modifiersName,
modifyTimestamp, creatorsName, and createTimestamp
attributes for entries. It also controls the entryCSN
and entryUUID attributes, which are needed by the
syncrepl provider. By default, olcLastMod is TRUE.
Controls whether slapd
will
automatically maintain the pwdLastSuccess attribute for
entries. By default, olcLastBind is FALSE.
Specify time and size limits based on the
operation's initiator or base DN. The argument
<selector>
can be
any of
- anonymous | users | [<dnspec>=]<pattern> | group[/oc[/at]]=<pattern>
with
- <dnspec> ::= dn[.<type>][.<style>]
- <type> ::= self | this
- <style> ::= exact | base | onelevel | subtree | children | regex | anonymous
DN type
self
is the default and means the bound user, whilethis
means the base DN of the operation. The termanonymous
matches all unauthenticated clients. The termusers
matches all authenticated clients; otherwise anexact
dn pattern is assumed unless otherwise specified by qualifying the (optional) key stringdn
withexact
orbase
(which are synonyms), to require an exact match; withonelevel
, to require exactly one level of depth match; withsubtree
, to allow any level of depth match, including the exact match; withchildren
, to allow any level of depth match, not including the exact match; regex explicitly requires the (default) match based on POSIX (''extended'') regular expression pattern. Finally,anonymous
matches unbound operations; thepattern
field is ignored. The same behavior is obtained by using theanonymous
form of the<selector>
clause. The termgroup
, with the optional objectClassoc
and attributeTypeat
fields, followed bypattern
, sets the limits for any DN listed in the values of theat
attribute (defaultmember
) of theoc
group objectClass (defaultgroupOfNames
) whose DN exactly matchespattern
.The currently supported limits are
size
andtime
.The syntax for time limits is
time[.{soft|hard}]=<integer>
, whereinteger
is the number of seconds slapd will spend answering a search request. If no time limit is explicitly requested by the client, thesoft
limit is used; if the requested time limit exceeds thehard
limit, the value of the limit is used instead. If thehard
limit is set to the keywordsoft
, the soft limit is used in either case; if it is set to the keywordunlimited
, no hard limit is enforced. Explicit requests for time limits smaller or equal to thehard
limit are honored. If no limit specifier is set, the value is assigned to thesoft
limit, and thehard
limit is set tosoft
, to preserve the original behavior.The syntax for size limits is
size[.{soft|hard|unchecked}]=<integer>
, whereinteger
is the maximum number of entries slapd will return answering a search request. If no size limit is explicitly requested by the client, thesoft
limit is used; if the requested size limit exceeds thehard
limit, the value of the limit is used instead. If thehard
limit is set to the keywordsoft
, the soft limit is used in either case; if it is set to the keywordunlimited
, no hard limit is enforced. Explicit requests for size limits smaller or equal to thehard
limit are honored. Theunchecked
specifier sets a limit on the number of candidates a search request is allowed to examine. The rationale behind it is that searches for non-properly indexed attributes may result in large sets of candidates, which must be examined by slapd(8) to determine whether they match the search filter or not. Theunchecked
limit provides a means to drop such operations before they are even started. If the selected candidates exceed theunchecked
limit, the search will abort with Unwilling to perform. If it is set to the keywordunlimited
, no limit is applied (the default). If it is set todisabled
, the search is not even performed; this can be used to disallow searches for a specific set of users. If no limit specifier is set, the value is assigned to thesoft
limit, and thehard
limit is set tosoft
, to preserve the original behavior.In case of no match, the global limits are used. The default values are the same as for
olcSizeLimit
andolcTimeLimit
; no limit is set onunchecked
.If
pagedResults
control is requested, thehard
size limit is used by default, because the request of a specific page size is considered an explicit request for a limitation on the number of entries to be returned. However, the size limit applies to the total count of entries returned within the search, and not to a single page. Additional size limits may be enforced; the syntax issize.pr={<integer>|noEstimate|unlimited}
, whereinteger
is the max page size if no explicit limit is set; the keywordnoEstimate
inhibits the server from returning an estimate of the total number of entries that might be returned (note: the current implementation does not return any estimate). The keywordunlimited
indicates that no limit is applied to the pagedResults control page size. The syntaxsize.prtotal={<integer>|hard|unlimited|disabled}
allows one to set a limit on the total number of entries that the pagedResults control will return. By default it is set to thehard
limit which will use the size.hard value. When set,integer
is the max number of entries that the whole search with pagedResults control can return. Useunlimited
to allow unlimited number of entries to be returned, e.g. to allow the use of the pagedResults control as a means to circumvent size limitations on regular searches; the keyworddisabled
disables the control, i.e. no paged results can be returned. Note that the total number of entries returned when the pagedResults control is requested cannot exceed thehard
size limit of regular searches unless extended by theprtotal
switch.The
olcLimits
statement is typically used to let an unlimited number of entries be returned by searches performed with the identity used by the consumer for synchronization purposes by means of the RFC 4533 LDAP Content Synchronization protocol (seeolcSyncrepl
for details).When using subordinate databases, it is necessary for any limits that are to be applied across the parent and its subordinates to be defined in both the parent and its subordinates. Otherwise the settings on the subordinate databases are not honored.
Specifies the maximum number of aliases to dereference when trying to resolve an entry, used to avoid infinite alias loops. The default is 15.
This option puts a consumer database into
Multi-Provider mode. Update operations will be accepted
from any user, not just the updatedn. The database must
already be configured as a syncrepl consumer before
this keyword may be set. This mode also requires a
olcServerID
(see above) to be configured. By default, this setting
is FALSE. olcMonitoring:
TRUE | FALSE This option enables
database-specific monitoring in the entry related to
the current database in the "cn=Databases,cn=Monitor"
subtree of the monitor database, if the monitor
database is enabled. Currently, only the MDB database
provides database-specific monitoring. The default
depends on the backend type.
Configure a SLAPI plugin. See the slapd.plugin(5) manpage for more details.
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 olcRootPW
directive.
Many optional features, including syncrepl, require the
rootdn to be defined for the database. The olcRootDN
of the
cn=config
database defaults to cn=config
itself.
Specify a password (or hash of the password) for the
rootdn. The password can only be set if the rootdn is
within the namingContext (suffix) of the database. This
option accepts all RFC 2307 userPassword formats known
to the server (see olcPasswordHash
description) 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.
Specify that the current backend database is a subordinate of another backend database. A subordinate database may have only one suffix. This option may be used to glue multiple databases into a single namingContext. If the suffix of the current database is within the namingContext of a superior database, searches against the superior database will be propagated to the subordinate as well. All of the databases associated with a single namingContext should have identical rootdns. Behavior of other LDAP operations is unaffected by this setting. In particular, it is not possible to use moddn to move an entry from one subordinate to another subordinate within the namingContext.
If the optional advertise
flag is
supplied, the naming context of this database is
advertised in the root DSE. The default is to hide this
database context, so that only the superior context is
visible.
If the slap tools slapcat(8), slapadd(8), slapmodify(8), or slapindex(8) are used on the superior database, any glued subordinates that support these tools are opened as well.
Databases that are glued together should usually be configured with the same indices (assuming they support indexing), even for attributes that only exist in some of these databases. In general, all of the glued databases should be configured as similarly as possible, since the intent is to provide the appearance of a single directory.
Note that the subordinate functionality is
implemented internally by the glue
overlay and as
such its behavior will interact with other overlays in
use. By default, the glue overlay is automatically
configured as the last overlay on the superior
database. Its position on the database can be
explicitly configured by setting an overlay glue directive at
the desired position. This explicit configuration is
necessary e.g. when using the syncprov
overlay, which
needs to follow glue
in order to work
over all of the glued databases. E.g.
dn: olcDatabase={1}mdb,cn=config olcSuffix: dc=example,dc=com ... dn: olcOverlay={0}glue,olcDatabase={1}mdb,cn=config ... dn: olcOverlay={1}syncprov,olcDatabase={1}mdb,cn=config ...
See the Overlays section below for more details.
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.
If the suffix of one database is "inside" that of
another, the database with the inner suffix must come
first in the configuration file. You may also want to
glue such databases together with the olcSubordinate
attribute.
Store the syncrepl contextCSN in a subentry instead of the context entry of the database. The subentry's RDN will be "cn=ldapsync". The default is FALSE, meaning the contextCSN is stored in the context entry.
olcSyncrepl:
rid=<replica ID> provider=ldap[s]://<hostname>[:port]
searchbase=<base
DN> [type=refreshOnly|refreshAndPersist]
[interval=dd:hh:mm:ss]
[retry=[<retry
interval> <# of retries>]+]
[filter=<filter
str>] [scope=sub|one|base|subord]
[attrs=<attr
list>] [exattrs=<attr list>]
[attrsonly]
[sizelimit=<limit>]
[timelimit=<limit>]
[schemachecking=on|off]
[network−timeout=<seconds>]
[timeout=<seconds>]
[bindmethod=simple|sasl]
[binddn=<dn>]
[saslmech=<mech>]
[authcid=<identity>]
[authzid=<identity>]
[credentials=<passwd>]
[realm=<realm>]
[secprops=<properties>]
[keepalive=<idle>:<probes>:<interval>]
[starttls=yes|critical]
[tls_cert=<file>]
[tls_key=<file>]
[tls_cacert=<file>]
[tls_cacertdir=<path>]
[tls_reqcert=never|allow|try|demand]
[tls_reqsan=never|allow|try|demand]
[tls_cipher_suite=<ciphers>]
[tls_ecname=<names>]
[tls_crlcheck=none|peer|all]
[tls_protocol_min=<major>[.<minor>]]
[suffixmassage=<real
DN>] [logbase=<base DN>]
[logfilter=<filter
str>] [syncdata=default|accesslog|changelog]
[lazycommit]
Specify the current database as a consumer which is kept up-to-date with the provider content by establishing the current slapd(8) as a replication consumer site running a
syncrepl
replication engine. The consumer content is kept synchronized to the provider content using the LDAP Content Synchronization protocol. Refer to the "OpenLDAP Administrator's Guide" for detailed information on setting up a replicatedslapd
directory service using thesyncrepl
replication engine.
rid
identifies the currentsyncrepl
directive within the replication consumer site. It is a non-negative integer not greater than 999 (limited to three decimal digits).
provider
specifies the replication provider site containing the provider content as an LDAP URI. If <port> is not given, the standard LDAP port number (389 or 636) is used.The content of the
syncrepl
consumer is defined using a search specification as its result set. The consumerslapd
will send search requests to the providerslapd
according to the search specification. The search specification includessearchbase
,scope
,filter
,attrs
,attrsonly
,sizelimit
, andtimelimit
parameters as in the normal search specification. Theexattrs
option may also be used to specify attributes that should be omitted from incoming entries. Thescope
defaults tosub
, thefilter
defaults to(objectclass=*)
, and there is no defaultsearchbase
. Theattrs
list defaults to"*,+"
to return all user and operational attributes, andattrsonly
andexattrs
are unset by default. Thesizelimit
andtimelimit
only accept "unlimited" and positive integers, and both default to "unlimited". Thesizelimit
andtimelimit
parameters define a consumer requested limitation on the number of entries that can be returned by the LDAP Content Synchronization operation; as such, it is intended to implement partial replication based on the size of the replicated database and on the time required by the synchronization. Note, however, that any provider-side limits for the replication identity will be enforced by the provider regardless of the limits requested by the LDAP Content Synchronization operation, much like for any other search operation.The LDAP Content Synchronization protocol has two operation types. In the
refreshOnly
operation, the next synchronization search operation is periodically rescheduled at an interval time (specified byinterval
parameter; 1 day by default) after each synchronization operation finishes. In therefreshAndPersist
operation, a synchronization search remains persistent in the provider slapd. Further updates to the provider will generatesearchResultEntry
to the consumer slapd as the search responses to the persistent synchronization search. If the initial search fails due to an error, the next synchronization search operation is periodically rescheduled at an interval time (specified byinterval
parameter; 1 day by default)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 3 times before stop retrying. The `+' in <# of retries> means indefinite number of retries until success. If noretry
is specified, by default syncrepl retries every hour forever.The schema checking can be enforced at the LDAP Sync consumer site by turning on the
schemachecking
parameter. The default isoff
. Schema checkingon
means that replicated entries must have a structural objectClass, must obey to objectClass requirements in terms of required/allowed attributes, and that naming attributes and distinguished values must be present. As a consequence, schema checking should beoff
when partial replication is used.The
network−timeout
parameter sets how long the consumer will wait to establish a network connection to the provider. Once a connection is established, thetimeout
parameter determines how long the consumer will wait for the initial Bind request to complete. The defaults for these parameters come from ldap.conf(5).A
bindmethod
ofsimple
requires the optionsbinddn
andcredentials
and should only be used when adequate security services (e.g. TLS or IPSEC) are in place. REMEMBER: simple bind credentials must be in cleartext! Abindmethod
ofsasl
requires the optionsaslmech.
Depending on the mechanism, an authentication identity and/or credentials can be specified usingauthcid
andcredentials.
Theauthzid
parameter may be used to specify an authorization identity. Specific security properties (as with thesasl−secprops
keyword above) for a SASL bind can be set with thesecprops
option. A non default SASL realm can be set with therealm
option. The identity used for synchronization by the consumer should be allowed to receive an unlimited number of entries in response to a search request. The provider, other than allowing authentication of the syncrepl identity, should grant that identity appropriate access privileges to the data that is being replicated (access
directive), and appropriate time and size limits. This can be accomplished by either allowing unlimitedsizelimit
andtimelimit
, or by setting an appropriatelimits
statement in the consumer's configuration (seesizelimit
andlimits
for details).The
keepalive
parameter sets the values ofidle
,probes
, andinterval
used to check whether a socket is alive;idle
is the number of seconds a connection needs to remain idle before TCP starts sending keepalive probes;probes
is the maximum number of keepalive probes TCP should send before dropping the connection;interval
is interval in seconds between individual keepalive probes. Only some systems support the customization of these values; thekeepalive
parameter is ignored otherwise, and system-wide settings are used.The
starttls
parameter specifies use of the StartTLS extended operation to establish a TLS session before Binding to the provider. If thecritical
argument is supplied, the session will be aborted if the StartTLS request fails. Otherwise the syncrepl session continues without TLS. Thetls_reqcert
setting defaults to "demand", thetls_reqsan
setting defaults to "allow", and the other TLS settings default to the same as the main slapd TLS settings.The
suffixmassage
parameter allows the consumer to pull entries from a remote directory whose DN suffix differs from the local directory. The portion of the remote entries' DNs that matches thesearchbase
will be replaced with the suffixmassage DN.Rather than replicating whole entries, the consumer can query logs of data modifications. This mode of operation is referred to as
deltasyncrepl
. In addition to the above parameters, thelogbase
andlogfilter
parameters must be set appropriately for the log that will be used. Thesyncdata
parameter must be set to either "accesslog" if the log conforms to the slapo-accesslog(5) log format, or "changelog" if the log conforms to the obsoletechangelog
format. If thesyncdata
parameter is omitted or set to "default" then the log parameters are ignored.The
lazycommit
parameter tells the underlying database that it can store changes without performing a full flush after each change. This may improve performance for the consumer, while sacrificing safety or durability.
This option is only applicable in a replica
database. It specifies the DN permitted to update
(subject to access controls) the replica. It is only
needed in certain push-mode replication scenarios.
Generally, this DN should
not be the same as the rootdn
used at the
provider.
Specify the referral to pass back when slapd(8) is asked to modify a replicated local database. If multiple values are specified, each url is provided.
Each database may allow specific configuration options; they are documented separately in the backends' manual pages. See the slapd.backends(5) manual page for an overview of available backends.
An overlay is a piece of code that intercepts database operations in order to extend or change them. Overlays are pushed onto a stack over the database, and so they will execute in the reverse of the order in which they were configured and the database itself will receive control last of all.
Overlays must be configured as child entries of a specific
database. The entry's RDN must be of the form olcOverlay={x}<overlaytype>
and the entry must have the olcOverlayConfig objectClass.
Normally the config engine generates the "{x}" index in the
RDN automatically, so it can be omitted when initially
loading these entries.
See the slapd.overlays(5) manual page for an overview of available overlays.
Here is a short example of a configuration in LDIF suitable for use with slapadd(8) :
dn: cn=config objectClass: olcGlobal cn: config olcPidFile: LOCALSTATEDIR/run/slapd.pid olcAttributeOptions: x−hidden lang− dn: cn=schema,cn=config objectClass: olcSchemaConfig cn: schema include: file://SYSCONFDIR/schema/core.ldif dn: olcDatabase=frontend,cn=config objectClass: olcDatabaseConfig objectClass: olcFrontendConfig olcDatabase: frontend # Subtypes of "name" (e.g. "cn" and "ou") with the # option ";x−hidden" can be searched for/compared, # but are not shown. See slapd.access(5). olcAccess: to attrs=name;x−hidden by * =cs # Protect passwords. See slapd.access(5). olcAccess: to attrs=userPassword by * auth # Read access to other attributes and entries. olcAccess: to * by * read # set a rootpw for the config database so we can bind. # deny access to everyone else. dn: olcDatabase=config,cn=config objectClass: olcDatabaseConfig olcDatabase: config olcRootPW: {SSHA}XKYnrjvGT3wZFQrDD5040US592LxsdLy olcAccess: to * by * none dn: olcDatabase=mdb,cn=config objectClass: olcDatabaseConfig objectClass: olcMdbConfig olcDatabase: mdb olcSuffix: "dc=our−domain,dc=com" # The database directory MUST exist prior to # running slapd AND should only be accessible # by the slapd/tools. Mode 0700 recommended. olcDbDirectory: LOCALSTATEDIR/openldap−data # Indices to maintain olcDbIndex: objectClass eq olcDbIndex: cn,sn,mail pres,eq,approx,sub # We serve small clients that do not handle referrals, # so handle remote lookups on their behalf. dn: olcDatabase=ldap,cn=config objectClass: olcDatabaseConfig objectClass: olcLdapConfig olcDatabase: ldap olcSuffix: "" olcDbUri: ldap://ldap.some−server.com/
Assuming the above data was saved in a file named "config.ldif" and the ETCDIR/slapd.d directory has been created, this command will initialize the configuration:
slapadd −F ETCDIR/slapd.d −n 0 −l config.ldif
"OpenLDAP Administrator's Guide" contains a longer annotated example of a slapd configuration.
Alternatively, an existing slapd.conf file can be converted to the new format using slapd or any of the slap tools:
slaptest −f ETCDIR/slapd.conf −F ETCDIR/slapd.d
default slapd configuration file
default slapd configuration directory
ldap(3), ldif(5), gnutls-cli(1), slapd.access(5), slapd.backends(5), slapd.conf(5), slapd.overlays(5), slapd.plugin(5), slapd(8), slapacl(8), slapadd(8), slapauth(8), slapcat(8), slapdn(8), slapindex(8), slapmodify(8), slappasswd(8), slaptest(8).
"OpenLDAP Administrator's Guide" (http://www.OpenLDAP.org/doc/admin/)
OpenLDAP Software is developed and maintained by The OpenLDAP Project <http://www.openldap.org/>. OpenLDAP Software is derived from the University of Michigan LDAP 3.3 Release.