English

Seven Deadliest Network Attacks

This book identifies seven classes of network attacks and discusses how the attack works, including tools to accomplish the attack, what are the risks of the attack, and how to defend against the attack. Seven attacks were chosen: denial of service, war dialing, penetration testing, protocol tunneling, spanning tree attacks, man-in-themiddle, and password replay. These are not mutually exclusive; you can exploit the spanning tree protocol, for example, to launch a denial-of-service attack. These were chosen because they help illustrate different aspects of network security; the principles on which they rely are unlikely to vanish any time soon, and they allow for the possibility of gaining something of interest to the attacker, from money to high-value data. Chapter 1, “Denial of Service,” illustrates how even sophisticated networks can be crippled by a determined hacker with relatively few resources. Chapter 2, “War Dialing,” illustrates how a hacker can circumvent the hardened security perimeter of a network to access “softer” targets. Chapter 3, “Penetration ‘Testing,’” discusses the various tools and techniques used for penetration testing that are readily available to both the

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