In Mastering Network Security, Chris Brenton presents a complete portrait of all the things that could go wrong with computer networks and provides a thorough discussion about the tools available to fight them. Brenton devote much attention to the tools you can use to thwart attackers. This book walk readers through safety audits and the process of developing an effective security policy. Then, on the theory that it's easier to secure the area you know well, Brenton provides an overview of internetworking technology - particularly, Virtual Private Networks (VPN) - and the inherent characteristics of their security. Mastering Network Security shows how to implement security measures - including logging, encryption, and packet filtering - the existing network infrastructure. The author also writes at length about additional security measures such as firewalls (especially Firewall-1), intrusion detection systems (focusing on RealSecure), and RAID redundancy data (with emphasis on OctopusHA +).