Realizar un escaneo de puertos básico (nmap -F rcn.org.uk)
Nmap scan report for rcn.org.uk (51.11.42.226)
Host is up (0.13s 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 5.33 seconds