Nmap scan report for rfclab.com (185.187.31.53)
Host is up (0.14s latency).
Not shown: 996 filtered tcp ports (no-response)
PORT      STATE SERVICE
21/tcp    open  ftp
80/tcp    open  http
443/tcp   open  https
30000/tcp open  ndmps

Nmap done: 1 IP address (1 host up) scanned in 12.06 seconds