Realizar un escaneo de puertos básico (nmap -F efa-bw.de)
Nmap scan report for efa-bw.de (94.186.213.206)
Host is up (0.28s 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 8.25 seconds