kpropd - Kerberos V5 slave KDC update server

kpropd [ -r realm ] [ -f slave_dumpfile ] [ -F principal_database ] [ -p kdb5_util_prog ] [ -d ] [ -S ] [ -P port ]

kpropd is the server which accepts connections from the kprop(8) program. kpropd accepts the dumped KDC database and places it in a file, and then runs kdb5_util(8) to load the dumped database into the active database which is used by krb5kdc(8). Thus, the master Kerberos server can use kprop(8) to propagate its database to the slave slavers. Upon a successful download of the KDC database file, the slave Kerberos server will have an up-to-date KDC database.

Normally, kpropd is invoked out of inetd(8). This is done by adding a line to the inetd.conf file which looks like this:

krb5_prop stream tcp nowait root /usr/sbin/kpropd kpropd

However, kpropd can also run as a standalone deamon, if the -S option is turned on. This is done for debugging purposes, or if for some reason the system administrator just doesn't want to run it out of inetd(8).

-r realm

specifies the realm of the master server; by default the realm returned by krb5_default_local_realm(3) is used.

-f file

specifies the filename where the dumped principal database file is to be stored; by default the dumped database file is KPROPD_DEFAULT_FILE (normally /var/lib/krb5kdc/from_master).

-p

allows the user to specify the pathname to the kdb5_util(8) program; by default the pathname used is KPROPD_DEFAULT_KDB5_UTIL (normally /usr/sbin/kdb5_util).

-S

turn on standalone mode. Normally, kpropd is invoked out of inetd(8) so it expects a network connection to be passed to it from inetd (8). If the -S option is specified, kpropd will put itself into the background, and wait for connections to the KPROP_SERVICE port (normally krb5_prop).

-d

turn on debug mode. In this mode, if the -S option is selected, kpropd will not detach itself from the current job and run in the background. Instead, it will run in the foreground and print out debugging messages during the database propagation.

-P

allow for an alternate port number for kpropd to listen on. This is only useful if the program is run in standalone mode.

kpropd.acl

Access file for kpropd. Each entry is a line containing the principal of a host from which the local machine will allow Kerberos database propagation via kprop.

kprop(8), kdb5_util(8), krb5kdc(8), inetd(8)