Realizar un escaneo de puertos básico (nmap -F 8.8.8.8)
Nmap scan report for dns.google (8.8.8.8)
Host is up (0.0041s latency).
Not shown: 98 filtered ports
PORT STATE SERVICE
53/tcp open domain
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 2.20 seconds