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What is a Firewall?


hen your computer is connected to the Internet, it receives traffic from a wide range of sources, most of it benign. Your instant messaging client alerts you that a friend has signed on; your mail client finds new mail waiting for you and downloads it; a weather site refreshes its rainfall map by telling your web browser to reload a page.

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Are There Different Types of Firewalls?


here are two main types of firewalls: hardware and software. They have different features and different benefits.

Let's find out what they are and how to use them.

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Why do I need a firewall?


ithout a firewall, your computer is operating under an "open door" policy. Bank account information. Passwords. Credit card numbers. Documents and photos that you don't want to share with the world. They are all available to anyone with bad intentions and basic computer skills.

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