For IT managers needing a good general background on securing systems, Internet Lockdown may be the book. At 312 pages, it's relatively small, so you can quickly browse and study essential information. The chapters are clearly written, with frequent cross-references to details covered in other chapters.

Author Tim Crothers, a security engineer at ITM Technology, has plenty of personal experience to draw on. He uses it to make the technical discussions relevant - and to show you how security administration is a constant balancing act between accepting human fallibility and creating too many controls.

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