This chapter showed us how to write our very own Nmap scripts! The NSE is a powerful (and sometimes complicated) tool, which can aid Nmap users in a variety of interesting and automated tasks. The script we wrote as a proof of concept can easily detect whether a robots.txt file exists on a server, but the possibilities to write Nmap scripts—either for internal use, or to detect specific vulnerabilities—are nearly endless!

In the next chapter, we will learn how to use tools that come in packages with the Nmap tool suite, as well as some useful tips and tricks to get the most out of them.