Realizar un escaneo de puertos básico (nmap -F admindemo.docusign.com)
Nmap scan report for admindemo.docusign.com (64.207.217.246)
Host is up (0.037s latency).
Not shown: 99 filtered ports
PORT STATE SERVICE
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 3.52 seconds