Realizar un escaneo de puertos básico (nmap -F nfon.net)
Nmap scan report for nfon.net (213.95.137.232)
Host is up (0.16s 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 6.42 seconds