Firewall - adaley0518/Tech_Journal GitHub Wiki

What is a firewall?

• A Firewall monitors incoming and outgoing traffic through a network. The firewall can block or allow data packets based on the security rules. "Its purpose is to establish a barrier between your internal network and incoming traffic from external sources." The firewall will proceed to block potentially malicious traffic. There are many types of firewalls as well, however, the most common is packet-filtering.

How does it work?

• Firewalls works through ports. These ports allow for information to be exchanged through external devices.

In the Lab

• Firewalls were talked about a lot in the lab and will be used in the lab often. Since we are creating our own network, it would be useful to refer back to firewalls to remember the main use of it. There are a lot of components to making a network and the basics play a big function in understanding the big picture. Learning about firewalls allows us to understand Opnsense and why we do the steps to configure it.