Installing, Configuring and Administering the Kerberos Server V 2.0 on HP-UX 11i

Configuration
krb.realms
Chapter 5 75
For example, to indicate that hosts deer.bambi.com
and goat.bambi.com belong to REALM1, you need to
add the following entry in your krb.realms file:
.bambi.com REALM1
* (an asterisk) Begin the name field with an asterisk followed by a
parent domain name to designate all hosts in
subdomains belong to the indicated realms.
For example, to indicate that hosts june.sales.com
and july.sales.com belong to REALM2, you need to
add the following entry in your krb.realms file:
*.sales.com REALM2