"Two weeks ago, I explained how to set up a Kerberos realm; and
last week, I went on to describe how to actually do something
useful with it by doing Kerberized NFS. But there's so much more
interesting stuff that can be done with Kerberos, and it would be a
shame to ignore those.
"Before I can go ahead and detail everything Kerberos, it's
important for you to understand a few things. A server that
requires authentication cannot just blindly assume that any client
it will talk to will be able to do Kerberos authentication..."