Northcutt opens with a brief technical methods used by Kevin Mitnick in the attack on Tsutomu Shimomura's server. Department of Defense, Northcutt explains how a system administrator would detect and defeat an attack like Mitnick. Another case study appears later in this book, this one is in the form-by-line analysis of a line. History. File that shows how bad a guy with root privileges attacked a Domain Name System (DNS) - the server David Wall Topics covered: Catching intruders in the act by recognizing the characteristics of various kinds of attacks in real time, both manually and by using filters and other automated systems, techniques to identify security weaknesses and minimizing false security alarms.