This is a rather old post I originally wrote in 2013, but it’s still a good introduction to Lua and Nmap scripting, so I decided to repost it. Whether you are working as a security professional or a network administrator, chances are that Nmap (“Network Mapper”) is part of your regular toolkit. For many people this project, which was started by Gordon “Fyodor” Lyon in 1997, is the first choice when it comes to host and service discovery.
