Internet security is a major issue for any organization that is connected to the internet. Fermilab is no exception. We place the utmost priority on security and make every attempt possible to create a secure and stable environment for our users. For informational purposes, we have created the Fermi Linux Security Page for disseminating information on what steps we have taken to create a secure Fermi Linux distribution. 
By default Scientific Linux Fermi comes kerberized and bound to Fermi's FNAL.GOV realm. If you want people to be able to log into your machine you must get a kerberos principle for your machine. To get one do the following steps.

  1. get a host key password from here
  2. /usr/krb5/config/makehostkeys   (use password from step 1)
If you do not get any errors you should have a /etc/krb5.keytab file. You can verify it is correct by doing a klist -k and it should should you your machines host and ftp principles.
For more information about kerberos on Fermi Linux send mail to kerberos-users@fnal.gov .