Out of the box, Linux is a highly secure operating system, but does that mean you can get by without a bit of help? Let's find out.

Firewalls are software programs that can be used to detect if someone is trying to access files on your computer. A firewall blocks out any unauthorized traffic as well as permits authorized ...

Bill Cheswick will deny that he invented computer firewalls, but it’s what the modest computer security researcher is really known for.

The Windows XP firewall software works only "one way," however -- meaning it blocks only suspicious activity aimed at your computer.