Realizar un escaneo de puertos básico (nmap -F online-access1.com)
Nmap scan report for online-access1.com (23.253.180.65)
Host is up (0.053s latency).
Not shown: 99 closed tcp ports (reset)
PORT STATE SERVICE
80/tcp open http
Nmap done: 1 IP address (1 host up) scanned in 3.13 seconds