Realizar un escaneo de puertos básico (nmap -F geroline.de)
Nmap scan report for geroline.de (104.196.103.18)
Host is up (0.059s latency).
rDNS record for 104.196.103.18: 18.103.196.104.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 2.68 seconds