Firewalls

Introduction
A firewall is a piece of hardware or software which looks at network traffic passing through it and either allows the traffic through or blocks it.



What is a Firewall Video
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Task
Read [|how firewalls work on How Stuff Works].

Now answer the following questions: 1. What is meant be a firewall rule? 2. What three methods do firewalls use to control the flow of data coming into and going out of a network? 3. List five different conditions by which a firewall can be configured.

Task
Research a personal firewall product - either find your own or use one from the following list:
 * ZoneAlarm Firewall
 * Comodo Firewall
 * Lavasoft Firewall

Copy and complete the table below