A firewall is an important piece of software to have on any computer that connects to the internet. A Firewall is a security interface that is designed to keep an entrance to a network safe and secure and to stop any unwanted traffic that may be trying to access the network or computer.

The main reason to hav ea firewall is to help stop any hackers trying to gain access to your computer. Hackers can use a number of different techniques or ways to try and get access to a computer through the internet so the firewall is designed to stop these and "close" these gaps that the hackers try to explit and use to enter.

Like anti virus software firewalls also need to get updated, although this is not as often as anti virus software you will still from time to time need to check for updates to firewall software.