- Kerberos propagation daemon for slave KDCs
/usr/lib/krb5/kpropd [-d] [-f temp_dbfile] [-F dbfile] [-p kdb_util] [-P port_number] [-r realm] [-s srv_tabfile] [-S] [-a acl_file]
The kpropd command runs on the slave KDC server. It listens for update requests made by kprop(1M) from the master KDC and periodically requests incremental updates from the master KDC.
When the slave receives a kprop request from the master, kpropd copies principal data to a temporary text file. Next, kpropd invokes kdb5_util(1M) (unless a different database utility is selected) to load the text file in database format.
When the slave periodically requests incremental updates, kpropd update its principal.ulog file with any updates from the master. kproplog(1M) can be used to view a summary of the update entry log on the slave KDC.
kpropd is not configured for incremental database propagation by default. These settings can be changed in the kdc.conf(4) file:
Enables or disables incremental database propagation. Default is false.
Specifies how often the slave KDC polls for any updates that the master might have. Default is 2m (two minutes).
The kiprop/<hostname>@<REALM> principal must exist in the slave's keytab file to enable the master to authenticate incremental propagation requests from the slave. In this syntax, <hostname> is the slave KDC's host name and <REALM> is the realm in which the slave KDC resides.
The following options are supported:
Enable debug mode. Default is debug mode disabled.
The location of the slave's temporary principal database file. Default is /var/krb5/from_master.
The location of the slave's principal database file. Default is /var/krb5/principal.
The location of the Kerberos database utility used for loading principal databases. Default is /usr/sbin/kdb5_util.
Specifies the port number on which kpropd will listen. Default is 754 (service name: krb5_prop).
Specifies from which Kerberos realm kpropd will receive information. Default is specified in /etc/krb5/krb5.conf.
The location of the service table file used to authenticate the kpropd daemon.
Run the daemon in standalone mode, instead of having inetd listen for requests. Default is non-standalone mode.
The location of the kpropd's access control list to verify if this server can run the kpropd daemon. The file contains a list of principal name(s) that will be receiving updates. Default is /etc/krb5/kpropd.acl.
Kerberos principal database.
The update log file.
KDC configuration information.
List of principals of all the KDCs; resides on each slave KDC.
Temporary file used by kpropd before loading this to the principal database.
See attributes(5) for descriptions of the following attributes: