Realizar un escaneo de puertos básico (nmap -F ringcentral.eu)
Nmap scan report for ringcentral.eu (104.18.38.220)
Host is up (0.00084s latency).
Other addresses for ringcentral.eu (not scanned): 2606:4700:4400::6812:26dc 2606:4700:4400::ac40:9524 172.64.149.36
Not shown: 96 filtered tcp ports (no-response)
PORT STATE SERVICE
80/tcp open http
443/tcp open https
8080/tcp open http-proxy
8443/tcp open https-alt
Nmap done: 1 IP address (1 host up) scanned in 2.51 seconds