KPROPD(8) MIT Kerberos KPROPD(8)NAMEkpropd - Kerberos V5 slave KDC update server
SYNOPSISkpropd [-r realm] [-a acl_file] [-f slave_dumpfile] [-F principal_data‐
base] [-p kdb5_util_prog] [-P port] [-d]
DESCRIPTION
The kpropd command runs on the slave KDC server. It listens for update
requests made by the kprop(8) program. If incremental propagation is
enabled, it periodically requests incremental updates from the master
KDC.
When the slave receives a kprop request from the master, 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). This allows the master Kerberos server to use
kprop(8) to propagate its database to the slave servers. Upon a suc‐
cessful download of the KDC database file, the slave Kerberos server
will have an up-to-date KDC database.
Where incremental propagation is not used, kpropd is commonly invoked
out of inetd(8) as a nowait service. This is done by adding a line to
the /etc/inetd.conf file which looks like this:
kprop stream tcp nowait root /usr/local/sbin/kpropd kpropd
kpropd can also run as a standalone daemon. This is required for
incremental propagation. But this is also useful for debugging pur‐
poses.
Incremental propagation may be enabled with the iprop_enable variable
in kdc.conf(5). If incremental propagation is enabled, the slave peri‐
odically polls the master KDC for updates, at an interval determined by
the iprop_slave_poll variable. If the slave receives updates, kpropd
updates its log file with any updates from the master. kproplog(8) can
be used to view a summary of the update entry log on the slave KDC. If
incremental propagation is enabled, the principal kiprop/slavehost‐
name@REALM (where slavehostname is the name of the slave KDC host, and
REALM is the name of the Kerberos realm) must be present in the slave's
keytab file.
kproplog(8) can be used to force full replication when iprop is
enabled.
OPTIONS-r realm
Specifies the realm of the master server.
-f file
Specifies the filename where the dumped principal database file
is to be stored; by default the dumped database file is
/var/kerberos/krb5kdc/from_master.
-p Allows the user to specify the pathname to the kdb5_util(8) pro‐
gram; by default the pathname used is /usr/sbin/kdb5_util.
-S [DEPRECATED] Enable standalone mode. Normally kpropd is invoked
by inetd(8) so it expects a network connection to be passed to
it from inetd(8). If the -S option is specified, or if standard
input is not a socket, kpropd will put itself into the back‐
ground, and wait for connections on port 754 (or the port speci‐
fied with the -P option if given).
-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 in combination with the -S option.
-a acl_file
Allows the user to specify the path to the kpropd.acl file; by
default the path used is /var/kerberos/krb5kdc/kpropd.acl.
ENVIRONMENTkpropd uses the following environment variables:
· KRB5_CONFIG
· KRB5_KDC_PROFILE
FILES
kpropd.acl
Access file for kpropd; the default location is
/usr/local/var/krb5kdc/kpropd.acl. Each entry is a line con‐
taining the principal of a host from which the local machine
will allow Kerberos database propagation via kprop(8).
SEE ALSOkprop(8), kdb5_util(8), krb5kdc(8), inetd(8)AUTHOR
MIT
COPYRIGHT
1985-2013, MIT
1.11.3KPROPD(8)
