Nmap scan report for renshengerlu.com (216.155.157.181)
Host is up (0.069s latency).
rDNS record for 216.155.157.181: 216.155.157.181.vultrusercontent.com
Not shown: 996 closed tcp ports (reset)
PORT    STATE    SERVICE
17/tcp  filtered qotd
19/tcp  filtered chargen
80/tcp  open     http
443/tcp open     https

Nmap done: 1 IP address (1 host up) scanned in 3.24 seconds