KRB5KDC(8) Maintenance Commands and Procedures KRB5KDC(8)

NAME

krb5kdc - KDC daemon

SYNOPSIS

/usr/lib/krb5/krb5kdc [-d dbpath] [-r realm] [-m]
[-k masterenctype] [-M masterkeyname]
[-p port] [-n] [-x db_args]...

DESCRIPTION

krb5kdc is the daemon that runs on the master and slave KDCs to
process the Kerberos tickets. For Kerberos to function properly,
krb5kdc must be running on at least one KDC that the Kerberos clients
can access. Prior to running krb5kdc, you must initialize the
Kerberos database using kdb5_util(8). See the for information
regarding how to set up KDCs and initialize the Kerberos database.

OPTIONS

The following options are supported:

-d dbpath

Specify the path to the database; default value is /var/krb5.


-k masterenctype

Specify the encryption type for encrypting the database. The
default value is des-cbc-crc. des3-cbc-sha1, arcfour-hmac-md5,
arcfour-hmac-md5-exp, aes128-cts-hmac-sha1-96, and aes256-cts-
hmac-sha1-96 are also valid.


-m

Specify that the master key for the database is to be entered
manually.


-M masterkeyname

Specify the principal to retrieve the master Key for the
database.


-n

Specify that krb5kdc should not detach from the terminal.


-p port

Specify the port that will be used by the KDC to listen for
incoming requests.


-r realm

Specify the realm name; default is the local realm name.


-x db_args

Pass database-specific arguments to kadmin. Supported arguments
are for the LDAP plug-in. These arguments are:

binddn=binddn

Specifies the DN of the object used by the KDC server to bind
to the LDAP server. This object should have the rights to
read the realm container, principal container and the subtree
that is referenced by the realm. Overrides the ldap_kdc_dn
parameter setting in krb5.conf(5).


bindpwd=bindpwd

Specifies the password for the above-mentioned binddn. It is
recommended not to use this option. Instead, the password can
be stashed using the stashsrvpw command of kdb5_ldap_util(8).


nconns=num

Specifies the number of connections to be maintained per LDAP
server.


host=ldapuri

Specifies, by an LDAP URI, the LDAP server to which to
connect.

FILES

/var/krb5/principal.db

Kerberos principal database.


/var/krb5/principal.kadm5

Kerberos administrative database. This file contains policy
information.


/var/krb5/principal.kadm5.lock

Kerberos administrative database lock file. This file works
backwards from most other lock files (that is, kadmin will exit
with an error if this file does not exist).


/etc/krb5/kdc.conf

KDC configuration file. This file is read at startup.


/etc/krb5/kpropd.acl

File that defines the access control list for propagating the
Kerberos database using kprop.

SEE ALSO

kill(1), kpasswd(1), kadmind(8), kadmin.local(8), kdb5_util(8),
kdb5_ldap_util(8), logadm(8), krb5.conf(5), attributes(7),
krb5envvar(7), kerberos(7),

NOTES

The following signal has the specified effect when sent to the server
process using the kill(1)command:

SIGHUP

krb5kdc closes and re-opens log files that it directly opens.
This can be useful for external log-rotation utilities such as
logadm(8). If this method is used for log file rotation, set the
krb5.conf(5) kdc_rotate period relation to never.


October 29, 2015 KRB5KDC(8)