Realizar un escaneo de puertos básico (nmap -F granite.edu)
Nmap scan report for granite.edu (132.177.132.123)
Host is up (0.082s latency).
Not shown: 98 filtered tcp ports (no-response)
PORT STATE SERVICE
80/tcp open http
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 6.47 seconds