Effectuer une analyse de port de base (nmap -F qualysguard.tw)
Nmap scan report for qualysguard.tw (64.39.96.133)
Host is up (0.012s latency).
rDNS record for 64.39.96.133: www.qualys.com
Not shown: 99 filtered tcp ports (no-response)
PORT STATE SERVICE
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 4.88 seconds