Realizar un escaneo de puertos básico (nmap -F crab.org)
Nmap scan report for crab.org (65.155.116.156)
Host is up (0.029s latency).
Not shown: 98 closed ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 6.08 seconds