Unfortunately, that??™s more than
enough to keep you busy for quite some time.
In earlier chapters, you??™ve learned some basic skills for
protecting your computer with permissions (Chapter 19,
???Managing Users, Managing Security???), fighting viruses
(Chapter 15, ???Managing Email Servers???), and transferring
files securely (Chapter 17, ???Secure File Transfer???). In this
chapter, the focus is on other tools to protect yourself and
your information. You also will become prepared for the
worst and acquire some idea of what to do when your carefully
laid security strategy is somehow penetrated.
Understanding Computer Attacks
There are many ways to divide up the types of computer attacks, but perhaps the easiest
to understand is the internal attack, where someone has access to a computer on the local
area network. This is in contrast to the external attack, which occurs over the Internet.
The distinction is important because it clarifies the relative danger your system is in.
Chances are excellent that your local network is protected quite well by the system of
permissions, along with the trust you place in your users to not damage the system.
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