Like a pilot that keeps monitoring an airplane's instruments so that it continues flying safely, a firewall administrator (or a firewall pilot, if you like) must monitor each aspect of its firewall to keep the network secure. Instead of flight instruments, in OPNsense, we have graphics that help us know how the system is working so that we can make decisions based on each graph that's read. Add logs to this, and you will know everything about your firewall, especially during troubleshooting. If you want to be known as someone who solves issues fast, my advice is this: pay attention to the logs and graphs and always read the documentation!

OPNsense provides several graphs that you can use to monitor a firewall system. Let's explore each graph and learn how to use them to help us keep our firewall flying.

Our quest begins with accessing the Reporting | Health menu. After accessing this menu, the following page will open: