Realizar un escaneo de puertos básico (nmap -F sdc.dk)
Nmap scan report for sdc.dk (137.117.229.255)
Host is up (0.14s latency).
Not shown: 98 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 4.48 seconds