Realizar un escaneo de puertos básico (nmap -F contently.net)
Nmap scan report for contently.net (104.196.152.145)
Host is up (0.060s latency).
rDNS record for 104.196.152.145: 145.152.196.104.bc.googleusercontent.com
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 2.74 seconds