Unless you are in the habit of hanging around with the bad guys and giving them access
to your system, you shouldn??™t have to spend a great deal of time protecting your system
against your users.
It??™s that outside world that you must worry about most. In a world??”and Internet??”filled
with millions upon millions of people, some percentage (usually small) will be evil. The
Internet makes it possible for machines to connect on a vast scale, and any single
machine can be attacked by people located anywhere on the planet. Within minutes of
making first contact with the Internet, some machines can be attacked, although usually
not successfully. Don??™t let your machines be counted among the victims.
This situation is not a result of malicious users lying in wait for your IP address to do
something interesting. Instead, canny virus writers have created worms that exploit a
vulnerability, take control of a machine, and then spread it to other machines around
them. As a result, more attacks today are the result of these autohacking tools. There are
really only a handful of truly evil individuals out there; however, as with most human
endeavors, if you??™re really the target of someone??™s attack, you probably cannot prevent it
without a massive effort.
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