Nmap scan report for renqingzhang.com (38.38.248.52)
Host is up (0.00040s latency).
Not shown: 982 filtered tcp ports (no-response), 10 filtered tcp ports (admin-prohibited)
PORT     STATE  SERVICE
20/tcp   closed ftp-data
21/tcp   closed ftp
22/tcp   closed ssh
80/tcp   open   http
90/tcp   closed dnsix
443/tcp  open   https
8080/tcp closed http-proxy
9090/tcp closed zeus-admin

Nmap done: 1 IP address (1 host up) scanned in 6.07 seconds