Performing a basic port scan (nmap -F greystar.com)
Nmap scan report for greystar.com (20.37.143.130)
Host is up (0.037s latency).
Not shown: 98 filtered tcp ports (no-response)
PORT STATE SERVICE
80/tcp open http
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 3.67 seconds