krb5kdc - Kerberos V5 KDC
krb5kdc [-x db_args] [-d dbname] [-k keytype] [-M mkeyname] [-p port- num] [-m] [-r realm] [-n] [-w numworkers] [-P pid_file] [-T time_off- set]
KRB5KDC(8) MIT Kerberos KRB5KDC(8)
NAME
krb5kdc - Kerberos V5 KDC
SYNOPSIS
krb5kdc [-x db_args] [-d dbname] [-k keytype] [-M mkeyname] [-p port-
num] [-m] [-r realm] [-n] [-w numworkers] [-P pid_file] [-T time_off-
set]
DESCRIPTION
krb5kdc is the Kerberos version 5 Authentication Service and Key Dis-
tribution Center (AS/KDC).
OPTIONS
The -r realm option specifies the realm for which the server should
provide service.
The -d dbname option specifies the name under which the principal data-
base 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
des-cbc-crc.
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 back-
ground and does not disassociate itself from the terminal. In normal
operation, you should always allow the KDC to place itself in the back-
ground.
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 port numbers which the
KDC should listen on for Kerberos version 5 requests, as a comma-sepa-
rated list. This value overrides the UDP port numbers specified in the
kdcdefaults section of kdc.conf(5), but may be overridden by realm-spe-
cific 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.
NOTE:
On operating systems which do not have pktinfo support, using worker
processes will prevent the KDC from listening for UDP packets on
network interfaces created after the KDC starts.
The -x db_args option specifies database-specific arguments. See Data-
base 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.
EXAMPLE
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 spec-
ified in the kdc.conf(5) file. The location of this file may be speci-
fied by the KRB5_KDC_PROFILE environment variable. Per-realm parame-
ters specified in this file take precedence over options specified on
the command line. See the kdc.conf(5) description for further details.
ENVIRONMENT
krb5kdc uses the following environment variables:
o KRB5_CONFIG
o KRB5_KDC_PROFILE
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+-------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-------------------------+
|Availability | security/kerberos-5/kdc |
+---------------+-------------------------+
|Stability | Pass-through committed |
+---------------+-------------------------+
SEE ALSO
kdb5_util(8), kdc.conf(5), krb5.conf(5), kdb5_ldap_util(8)
AUTHOR
MIT
COPYRIGHT
1985-2018, MIT
NOTES
The krb5kdc service is managed by the service management facility,
smf(5), under the service identifier:
svc:/network/security/krb5kdc:default
Administrative actions on this service, such as enabling, disabling, or
requesting restart, can be performed using svcadm(1M). The service's
status can be queried using the svcs(1) command.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from http://web.mit.edu/ker-
beros/dist/krb5/1.16/krb5-1.16.1.tar.gz
Further information about this software can be found on the open source
community website at http://web.mit.edu/kerberos/.
1.16.1 KRB5KDC(8)