Bulletproof your system before you are hacked! From the publisher of the international best-seller, Hacking Exposed, here is a brilliant new offering written with a passion for security that will help you make the necessary upgrades and take the essential steps to secure your network infrastructure. The concise and consistent approach breaks down security into logical parts, giving you actions to take immediately, information on hardening your system from the top down, and finally when to go back and make further upgrades.