Dealing with Remote User Problems
When your Unix system is linked to the Internet, you can experience some interesting user problems. Your publicly available systems have the potential to be reached by millions of people; the chances are great that eventually you'll experience a problem with several of those people. Some of the more common problems remote users can cause include the following:
Denial-of-service attacks
Remote exploits that execute code on your system without an account
Using a compromised account to store and publish pirated software
Using your mail hub to send spam
Each of these incidents is covered in more detail in Chapter 13.
Unless you are a tier one ISP, remote users will be connecting to your systems through another provider. ...
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