nmap -T4 -F rudy.tech

Starting Nmap 7.40 ( https://nmap.org ) at 2017-05-01 10:43 +08
Nmap scan report for rudy.tech (132.147.78.3)
Host is up (0.0033s latency).
rDNS record for 132.147.78.3: fnet3-f78-access.vqbn.com.sg
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 1.92 seconds