Do you need to secure your network? Here's the book that will help you implement and maintain effective network security, no matter what size your network is or which NOS you're using. Packed with practical advice and indispensable information, this book systematically identifies the threats that your network faces and explains how to eliminate or minimize them. Covers all major network operating systems -- NT, NetWare, and Unix -- and all aspects of network security, from physical security of premises and equipment to anti-hacker countermeasures to setting up your own Virtual Private Networks. The CD includes evaluation and demonstration versions of commercial firewalls, intrusion detection software, and a complete security policy.