Listen on IPv4 addresses only.

Listen on IPv6 addresses only.

Run in Tool mode. The additional argument selects whether to run as slapadd, slapcat, slapdn, slapindex, slappasswd, or slaptest (slapacl and slapauth need the entire "acl" and "auth" option value to be spelled out, as "a" is reserved to slapadd). This option should be the first option specified when it is used; any remaining options will be interpreted by the corresponding slap tool program, according to the respective man pages. Note that these tool programs will usually be symbolic links to slapd. This option is provided for situations where symbolic links are not provided or not usable.

Turn on debugging as defined by debug−level. If this option is specified, even with a zero argument, slapd will not fork or disassociate from the invoking terminal. Some general operation and status messages are printed for any value of debug−level. debug−level is taken as a bit string, with each bit corresponding to a different kind of debugging information. See <ldap_log.h> for details. Remember that if you turn on packet logging, packets containing bind passwords will be output, so if you redirect the log to a logfile, that file should be read-protected.

This option tells slapd at what level debugging statements should be logged to the syslog(8) facility.

Specifies the service name for logging and other purposes. Defaults to basename of argv[0], i.e.: "slapd".

Selects the local user of the syslog(8) facility. Value can be LOCAL0, through LOCAL7, as well as USER and DAEMON. The default is LOCAL4. However, this option is only permitted on systems that support local users with the syslog(8) facility.

Specifies the slapd configuration file. The default is ETCDIR/slapd.conf.

Specifies the slapd configuration directory. The default is ETCDIR/slapd.d. If both −f and −F are specified, the config file will be read and converted to config directory format and written to the specified directory. If neither option is specified, slapd will attempt to read the default config directory before trying to use the default config file. If a valid config directory exists then the default config file is ignored. All of the slap tools that use the config options observe this same behavior.

slapd will by default serve ldap:/// (LDAP over TCP on all interfaces on default LDAP port). That is, it will bind using INADDR_ANY and port 389. The −h option may be used to specify LDAP (and other scheme) URLs to serve. For example, if slapd is given −h "ldap://127.0.0.1:9009/ ldaps:/// ldapi:///", it will listen on 127.0.0.1:9009 for LDAP, 0.0.0.0:636 for LDAP over TLS, and LDAP over IPC (Unix domain sockets). Host 0.0.0.0 represents INADDR_ANY (any interface). A space separated list of URLs is expected. The URLs should be of the LDAP, LDAPS, or LDAPI schemes, and generally without a DN or other optional parameters (excepting as discussed below). Support for the latter two schemes depends on selected configuration options. Hosts may be specified by name or IPv4 and IPv6 address formats. Ports, if specified, must be numeric. The default ldap:// port is 389 and the default ldaps:// port is 636.

The listener permissions are indicated by "x-mod=-rwxrwxrwx", "x-mod=0777" or "x-mod=777", where any of the "rwx" can be "-" to suppress the related permission, while any of the "7" can be any legal octal digit, according to chmod(1). The listeners can take advantage of the "x-mod" extension to apply rough limitations to operations, e.g. allow read operations ("r", which applies to search and compare), write operations ("w", which applies to add, delete, modify and modrdn), and execute operations ("x", which means bind is required). "User" permissions apply to authenticated users, while "other" apply to anonymous users; "group" permissions are ignored. For example, "ldap:///????x-mod=-rw-------" means that read and write is only allowed for authenticated connections, and bind is required for all operations. This feature is experimental, and requires to be manually enabled at configure time.

Specifies a directory to become the root directory. slapd will change the current working directory to this directory and then chroot(2) to this directory. This is done after opening listeners but before reading any configuration file or initializing any backend. When used as a security mechanism, it should be used in conjunction with −u and −g options.

slapd will run slapd with the specified user name or id, and that user's supplementary group access list as set with initgroups(3). The group ID is also changed to this user's gid, unless the -g option is used to override. Note when used with −r, slapd will use the user database in the change root environment.

Note that on some systems, running as a non-privileged user will prevent passwd back-ends from accessing the encrypted passwords. Note also that any shell back-ends will run as the specified non-privileged user.

slapd will run with the specified group name or id. Note when used with −r, slapd will use the group database in the change root environment.

This option provides a cookie for the syncrepl replication consumer. The cookie is a comma separated list of name=value pairs. Currently supported syncrepl cookie fields are rid and csn. rid identifies a replication thread within the consumer server and is used to find the syncrepl specification in slapd.conf(5) having the matching replication identifier in its definition. The rid must be provided in order for any other specified values to be used. csn is the commit sequence number received by a previous synchronization and represents the state of the consumer replica content which the syncrepl engine will synchronize to the current provider content.