Realizar un escaneo de puertos básico (nmap -F t-rnd.com)
Nmap scan report for t-rnd.com (13.78.123.87)
Host is up (0.099s 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 4.22 seconds