Firewalls Book

24seven is the series for experienced administrators who need to get the most out of their networks, hardware, and software. Starting at the point at which other books and training courses end and the real world begins, the 24seven series delivers a detailed, high-level approach to the information that administrators need to provide their companies with expert services.24seven books are written to build on the knowledge you already have. These books don't waste time covering the basic information you already know or that you can easily figure out on your own. Instead, they focus on the hard-to-find information that will enable you to make informed choices when installing, administering, and troubleshooting hardware and software.