Realizar un escaneo de puertos básico (nmap -F odnbonline.com)
Nmap scan report for odnbonline.com (147.249.12.42)
Host is up (0.088s latency).
rDNS record for 147.249.12.42: ltcfis-ifs-rp03.fisglobal.com
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 5.00 seconds