1. Red Hat Network Users Guide
    Desc: Setting up your network with Red Hat? This is great, it explores the basics, and some of the advance settings, gives the reader a great amount of info on Red Hat network security.
    Credit: Redhat.com

  2. Red Hat Security
    Desc: The official RH security primer, Configuring firewalls with Linux, Using Apache as a Secure Web Server, Securing and Optimizing Linux, some very good security related mailing lists, and keep up to date with the latest RH exploits, don't you just love Redhat.com?
    Credit: Redhat.com