Kerberos Realms

Although your Kerberos realm can be any ASCII string, convention is to make it the same as your domain name, in upper-case letters. For example, hosts in the domain example.com would be in the Kerberos realm EXAMPLE.COM.

If you need multiple Kerberos realms, MIT recommends that you use descriptive names which end with your domain name, such as BOSTON.EXAMPLE.COM and HOUSTON.EXAMPLE.COM.