What Exactly is a Firewall

What is a Firewall?

Firewalls are hardware and/or software systems which protect end users from malicious traffic on the Internet. When data is sent over the Internet, it comes packaged with information about where it is coming from and where it is supposed to go, as well as an indication as to what application the data is for.

Firewalls analyze the data, and then throw it out if it looks malicious or forward it to the network if it looks benign. For example, if the firewall sees a stream of data in which a random computer on the Internet is trying to connect to a computer inside of your network, it will discard the data and may also warn you about the attempted connection. However, if it sees that you are trying to initiate a connection to a website, it will forward that data along to the router where it will eventually reach the targeted website.


A little about the author. Applied Integration is a Managed IT Service Provider that works with companies to add to or supplement their IT Departments. Operating in Salt Lake City servicing companies in Utah and nationwide for over 20 years, they specialize in IT Solutions, computer support, IT Management and software support including Microsoft 365, Windows 10 and Spruce POS systems.

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