"Hacking Exposed: Network Security Secrets and Solutions" by Stuart McClure, Joel Scambra and George Kurtz Osborne. $39.99, 484 pp.
Be afraid. Or, at the very least, be cautious, because the bad guys already know this stuff. With more and more businesses, and even individuals, opening up full-time connections between their computers and the Internet, the playground for those who would break into computers has become vast.
And as Stuart McClure and company note in "Hacking Exposed," the number of those computer owners who've failed to lock important doors into their machines is surprisingly large.
McClure, et al, don't offer any easy solutions. But by explaining the tricks the crackers use, they offer system administrators a way to tighten up their security, keeping their computers from being among the Internet's low-hanging fruit.