No system components should be directly, publicly available. No user other than the system administrators should have shell access to these machines.
All unnecessary services should be disabled using ntsysv or
The following services should be enabled.
oracle (for Embedded Database Installation)
tomcat5 (for installation on Red Hat Enterprise Linux 5)
tomcat6 (for installation on Red Hat Enterprise Linux 6)
If the Satellite serves Monitoring-entitled systems and you wish to acknowledge via email the alert notifications you receive, you must configure sendmail or postfix to properly handle incoming mail.