Realizar un escaneo de puertos básico (nmap -F crv.com)
Nmap scan report for crv.com (76.76.21.21)
Host is up (0.00050s 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 8.74 seconds