Performing a basic port scan (nmap -F workjam.net.cn)
Nmap scan report for workjam.net.cn (39.102.46.19)
Host is up (0.15s latency).
Not shown: 95 filtered tcp ports (no-response)
PORT STATE SERVICE
22/tcp open ssh
80/tcp open http
443/tcp open https
3306/tcp closed mysql
3389/tcp closed ms-wbt-server
Nmap done: 1 IP address (1 host up) scanned in 3.89 seconds