"You've probably heard this statement from time to time, and
compared to Windows you could argue that it is. But really it's
kind of a meaningless statement: no system which is connected to a
network or used by human beings is completely secure, and if it was
it would probably be useless.
"But you can certainly beef up the security of a given Linux
system to make it more secure than it would otherwise be--while
still enabling it to do its job--and it's that process, known as
hardening, that is the subject of this article. Without going in to
the finer details, we'll be looking at the general steps you should
take to harden any system under your control that warrants extra
security beyond what you believe is necessary for your 'normal'