Native configuration for the secure rcmds

To use the secure rcmds, two principles must exist for every network interface to which they can be connected.

They are:
       host/FullInterfaceName@Realmname
       ftp/FullInterfaceName@Realmname
where FullInterfaceName is the interface name and the domain name for the primary HostName.DomainName. Realmname is the name of the Native Kerberos V realm.