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From Barnes & NobleThe Barnes & Noble Review
Most sysadmins have plenty of responsibilities: network security's only one of them. But that won't save you if something goes badly wrong. This book can help you prevent that. And, since it's based on open source tools, you can use its techniques for free: no begging for budgets!
This is the stuff you need to know right now. You'll start by taking a complete inventory of your network, wired and wireless. You'll walk through securing your perimeter: firewalls, remote access, VPNs, and remote desktops. Next, you'll harden and patch the Windows and Linux systems you already have. The authors present comprehensive coverage of two powerful, mature open source security tools -- Snort intrusion detection, and Wireshark network protocol analysis. There's an extremely useful chapter on reporting and troubleshooting, too.
This whole book smells right: You can tell that these authors have been practicing what they're preaching. Bill Camarda, from the July 2007 Read Only