What are personal firewalls and how do they work?

A firewall is a program that sits between your computer and your internet connection. It watches the traffic that goes back and forth and usually restricts traffic that you don’t want to come at you. For example, many hackers will scan computers to see what those computers are running before they attack. On the other hand, personal firewalls are often overly sensitive. Sometimes even visiting certain webpages can make the firewall think your computer is scanning someone. One of the main points of this document is to help the average user understand the difference.

First off, you’ll need a firewall. If you already have a firewall, obviously you can skip this section. If not, check out some of the information below, as well as the firewall guide.