Configuring a firewall

You are probably wondering why, in every chapter, we are installing or configuring something new in the lab. You might be wondering, why didn't we install this earlier in this book? This isn't a wrong train of thought as we could have simply spent the first part of this book installing everything that we needed for the lab. However, I feel that it is very important to get into the practice of continually building and tearing down your lab. This helps promote adaptability, which is a key component of pentesting. Adding elements in every chapter helps reinforce the practice of adaptability.

Many vendors provide industrial firewalls, with some of the more industry-recognized names being Cisco, Fortinet, Checkpoint, Palo Alto, Belden, and Moxa. Each vendor comes with a list of pros and cons, techniques, and features, which I will leave up to you to investigate further. When it comes to implementing firewalls and encountering them during an engagement...