Performing a basic port scan (nmap -F nybooks.com)
Nmap scan report for nybooks.com (192.0.66.176)
Host is up (0.00035s latency).
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 5.28 seconds