Effectuer une analyse de port de base (nmap -F gn-online.de)
Nmap scan report for gn-online.de (217.182.187.117)
Host is up (0.14s 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 6.29 seconds