Summary

To prepare the reader to best use the countermeasures described in this book, this chapter has outlined the fundamental aspects of operational security defined in regards to visibility, access, and trust. Security separates the asset from the threat, and those three components—visibility, access, and trust—are the holes or gateways in that separation, which in turn increase the attack surface of what needs protecting.

A proper application of security means the attack surface is limited to the known and desired available services. For any and all uses of a Linux system, there should be no mystery as to where an attack could happen. By assuring the only holes in security are the intentional ones, which were inserted for the sake of productivity, then only those intentional holes should be available for attack and no others.

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The Ultimate Computer Repair Guide

The Ultimate Computer Repair Guide

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