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What They Don't Know Won't Hurt You

The less an attacker knows about your system, the more difficult their job becomes. An exploit has to be tuned to the specific system, or it won't work - at worst, it will crash the machine, which may alert the administrator that something's amiss. But probing a machine to try to discover its characteristics can also frequently be detected, again raising alarms. It's wise to be chary about giving out information about how your systems are set up.

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