slapd - Stand-alone LDAP Daemon
/usr/sbin/slapd [-4|-6]
[-T {acl|a[dd]|auth|c[at]|
d[n]|i[ndex]|p[asswd]|s[chema]|t[est]}]
[-d debug-level]
[-f slapd-config-file]
[-F slapd-config-directory]
[-h URLs] [-n service-name]
[-s syslog-level]
[-l syslog-local-user]
[-o option[=value]]
[-r directory] [-u user]
[-g group] [-c cookie]
Slapd is the stand-alone LDAP daemon. It listens for LDAP
connections on any number of ports (default 389), responding to the
LDAP operations it receives over these connections. slapd is
typically invoked at boot time, usually out of /etc/rc.local. Upon
startup, slapd normally forks and disassociates itself from the
invoking tty. If configured in the config file (or config directory), the
slapd process will print its process ID (see getpid(2)) to a
.pid file, as well as the command line options during invocation to
an .args file (see slapd.conf(5)). If the -d flag is
given, even with a zero argument, slapd will not fork and
disassociate from the invoking tty.
See the "OpenLDAP Administrator's Guide" for more
details on slapd.
- -4
- Listen on IPv4 addresses only.
- -6
- Listen on IPv6 addresses only.
- -T tool
- Run in Tool mode. The tool argument selects whether to run as
slapadd, slapcat, slapdn, slapindex,
slappasswd, slapschema, 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.
- -d debug-level
- 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. Comma-separated arrays of
friendly names can be specified to select debugging output of the
corresponding debugging information. All the names recognized by the
loglevel directive described in slapd.conf(5) are supported.
If debug-level is ?, a list of installed debug-levels is
printed, and slapd exits.
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.
- -s syslog-level
- This option tells slapd at what debug-level debugging statements
should be logged to the syslog(8) facility. The value
syslog-level can be set to any value or combination allowed by the
-d switch. Slapd logs all messages selected by syslog-level
at the syslog(3) severity debug-level DEBUG, on the unit
specified with -l.
- -n service-name
- Specifies the service name for logging and other purposes. Defaults to
basename of argv[0], i.e.: "slapd".
- -l syslog-local-user
- 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. Logging to syslog(8) occurs at the "DEBUG" severity
debug-level.
- -f slapd-config-file
- Specifies the slapd configuration file. The default is
/etc/ldap/slapd.conf.
- -F slapd-config-directory
- Specifies the slapd configuration directory. The default is
/etc/ldap/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.
- -h URLlist
- 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.
For LDAP over IPC, name is the name of the socket, and
no port is required, nor allowed; note that directory separators
must be URL-encoded, like any other characters that are special to URLs;
so the socket
/usr/local/var/ldapi
must be specified as
ldapi://%2Fusr%2Flocal%2Fvar%2Fldapi
The default location for the IPC socket is /var/run/ldapi
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.
- -r directory
- 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.
- -u user
- 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.
- -g group
- 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.
- -c cookie
- 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, sid, and
csn. rid identifies a replication thread within the consumer
server and is used to find the syncrepl specification in
slapd.conf(5) or slapd-config(5) having the matching
replication identifier in its definition. The rid must be provided
in order for any other specified values to be used. sid is the
server id in a multi-provider configuration. csn is the commit
sequence number received by a previous synchronization and represents the
state of the consumer content which the syncrepl engine will synchronize
to the current provider content. In case of multi-provider
replication agreement, multiple csn values, semicolon separated,
can appear. Use only the rid part to force a full reload.
- -o option[=value]
- This option provides a generic means to specify options without the need
to reserve a separate letter for them.
It supports the following options:
- slp={on|off|slp-attrs}
- When SLP support is compiled into slapd, disable it (off),
enable it by registering at SLP DAs without specific SLP attributes
(on), or with specific SLP attributes slp-attrs that must be
an SLP attribute list definition according to the SLP standard.
For example,
"slp=(tree=production),(server-type=OpenLDAP),(server-version=2.4.15)"
registers at SLP DAs with the three SLP attributes tree, server-type and
server-version that have the values given above. This allows one to
specifically query the SLP DAs for LDAP servers holding the
production tree in case multiple trees are available.
To start slapd and have it fork and detach from the
terminal and start serving the LDAP databases defined in the default config
file, just type:
/usr/sbin/slapd
To start slapd with an alternate configuration file, and
turn on voluminous debugging which will be printed on standard error,
type:
/usr/sbin/slapd -f /var/tmp/slapd.conf -d 255
To test whether the configuration file is correct or not,
type:
/usr/sbin/slapd -Tt
ldap(3), slapd.conf(5), slapd-config(5),
slapd.access(5), slapacl(8), slapadd(8),
slapauth(8), slapcat(8), slapdn(8),
slapindex(8), slappasswd(8), slapschema(8),
slaptest(8).
"OpenLDAP Administrator's Guide"
(http://www.OpenLDAP.org/doc/admin/)
See http://www.openldap.org/its/
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.