Active Directory,  Mac OS X Server,  Mac Security

What is a Kerberos Realm

A realm is where the kerberos database is stored.  The realm lives on one computer (KDC) and  can have read-only slave servers (kinda’ like a cluster).  Each realm will have a listing in the following files

/private/var/db/krb5kdc/ 

.k5.FQDN.OF.REALM (secret key) 

kdc.conf (configuration file for the KDC) 

kadm5.acl (access control list for KDC)