Now more than ever, it is imperative that users be able to protect their system from hackers trashing their Web sites or stealing information. Written by a reformed hacker, this comprehensive resource identifies security holes in common computer and network systems, allowing system administrators to discover faults inherent within their network and work toward a solution to those problems. * Explores the most commonly used hacking techniques so users can safeguard their system * Covers all computing platforms * Includes step-by-step lists and discussions of the vulnerabilities inherent in each operating system on the market