Virtually every organization is reliant on its computer system, and when hackers infiltrate, the consequences can be grave-halts in productivity, sensitive information stolen, assets at risk. Network Security: A Hacker's Perspective, Second Edition will help you step into the minds of computer criminals so that you can predict their moves and stop them before they strike. Written for anyone with some networking experience, this completely updated edition of the bestseller covers the most serious network-related security threats, vulnerabilities, and loopholes related to most major platforms, including Windows, UNIX, and Novell. Using a hands-on approach and numerous real-life case studies, the book identifies the tools, techniques, and methods that criminals use to break into networks for espionage and malicious purposes, with tips for prevention, as well as countermeasures you can take in the event the hackers strike first. In addition to providing information on the significant advancements in the field of security, attacks, and network reconnaissance, this latest edition provides a completely new section on input validation attacks, password cracking, buffer overflows, Trojan attacks, and much, much more. A companion Web site offers all the tools, scripts, and code discussed in the book.