To convert your KDCs from Kerberos V4 to Kerberos V5, do the following:
kadmind(V4) daemon process on the master KDC and kill it. This will prevent changes to the Kerberos database while you convert the database to the new Kerberos V5 format.
% kdb_util dump /usr/local/var/krb5kdc/v4-dump
% kdb5_util load_v4 v4-dump
% kdb5_util stash
kadminddaemons, first find and kill the Kerberos V4
kerberosdaemon on each of the KDCs. Then start the
kadminddaemons as You will need to specify an argument to the
-4command line option to enable Kerberos 4 compatibility. See the
krb5kdcman page for details. directed. Finally, start the Kerberos V5 to V4 ticket translator daemon,
krb524d, by issuing the command:
% /usr/local/sbin/krb524d -m > /dev/null &
If you have a stash file and you start the
kadmind daemons at boot time, you should add the above line to
/etc/rc.local) file on each KDC.