Nmap is the most known port scanner, written and maintained by Gordon Lyon (Fyodor). It can be used for network discovery and for most security enumeration during the initial stages of penetration testing. Nmap has a multitude of options and when you first start playing with this tool it can be a bit daunting, so…
Article Link: https://andreafortuna.org/cybersecurity/nmap-my-own-cheatsheet/