Realizar un escaneo de puertos básico (nmap -F retinatoday.com)
Nmap scan report for retinatoday.com (34.202.241.89)
Host is up (0.071s latency).
rDNS record for 34.202.241.89: ec2-34-202-241-89.compute-1.amazonaws.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 2.84 seconds