krb5kdc - Kerberos V5 KDC
krb5kdc [
-x db_args] [
-d dbname] [
-k keytype] [
-M mkeyname] [
-p
portnum] [
-m] [
-r realm] [
-n] [
-w numworkers] [
-P pid_file] [
-T
time_offset]
krb5kdc is the Kerberos version 5 Authentication Service and Key Distribution
Center (AS/KDC).
The
-r realm option specifies the realm for which the server
should provide service. This option may be specified multiple times to serve
multiple realms. If no
-r option is given, the default realm (as
specified in
krb5.conf(5)) will be served.
The
-d dbname option specifies the name under which the principal
database can be found. This option does not apply to the LDAP database.
The
-k keytype option specifies the key type of the master key to
be entered manually as a password when
-m is given; the default is
aes256-cts-hmac-sha1-96.
The
-M mkeyname option specifies the principal name for the master
key in the database (usually
K/M in the KDC's realm).
The
-m option specifies that the master database password should be
fetched from the keyboard rather than from a stash file.
The
-n option specifies that the KDC does not put itself in the
background and does not disassociate itself from the terminal.
The
-P pid_file option tells the KDC to write its PID into
pid_file after it starts up. This can be used to identify whether the
KDC is still running and to allow init scripts to stop the correct process.
The
-p portnum option specifies the default UDP and TCP port
numbers which the KDC should listen on for Kerberos version 5 requests, as a
comma-separated list. This value overrides the port numbers specified in the
kdcdefaults section of
kdc.conf(5), but may be overridden by realm-specific
values. If no value is given from any source, the default port is 88.
The
-w numworkers option tells the KDC to fork
numworkers
processes to listen to the KDC ports and process requests in parallel. The top
level KDC process (whose pid is recorded in the pid file if the
-P
option is also given) acts as a supervisor. The supervisor will relay SIGHUP
signals to the worker subprocesses, and will terminate the worker subprocess
if the it is itself terminated or if any other worker process exits.
The
-x db_args option specifies database-specific arguments. See
Database Options in
kadmin(1) for supported arguments.
The
-T offset option specifies a time offset, in seconds, which
the KDC will operate under. It is intended only for testing purposes.
The KDC may service requests for multiple realms (maximum 32 realms). The realms
are listed on the command line. Per-realm options that can be specified on the
command line pertain for each realm that follows it and are superseded by
subsequent definitions of the same option.
For example:
krb5kdc -p 2001 -r REALM1 -p 2002 -r REALM2 -r REALM3
specifies that the KDC listen on port 2001 for REALM1 and on port 2002 for
REALM2 and REALM3. Additionally, per-realm parameters may be specified in the
kdc.conf(5) file. The location of this file may be specified by the
KRB5_KDC_PROFILE environment variable. Per-realm parameters specified
in this file take precedence over options specified on the command line. See
the
kdc.conf(5) description for further details.
See
kerberos(7) for a description of Kerberos environment variables.
kdb5_util(8),
kdc.conf(5),
krb5.conf(5),
kdb5_ldap_util(8),
kerberos(7)
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