Introduction and Networking Primer. Driven by the lack of clear information I had when I started, I wanted to write something about Nmap, try to present the options in as structured a way as possible and provide some insight and detail instead of just “instruction”
Getting Help The first thing that I must urge you to do is become self sufficient. There is an online manual at https://nmap.org/book/man.html but don't rely on that being available. One day you may find yourself onsite somewhere that internet access is very restricted, what would you do then?
Host Discovery Let's look at how we can identify live hosts, our options for the three types of scans we can use and how to limit the ports that are scanned.