我正在使用sudo node index.js在ubuntu上运行我的节点服务器
运行curl http://localhost/health-check会给出响应，但如果我使用公共IP，则不会得到任何响应
正在运行sudo netstat -ntlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
59739/node
正在运行nmap -A -T4 myDomainName
Starting Nmap 7.01 ( https://nmap.org ) at 2017-11-22 12:32 UTC
Nmap scan report for myDomainName (IP address)
Host is up (0.0011s latency).
Not shown: 997 filtered ports
PORT STATE SERVICE VERSION
...
80/tcp closed http
443/tcp closed https
正在运行nmap localhost
Starting Nmap 7.01 ( https://nmap.org ) at 2017-11-22 12:28 UTC
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000062s latency).
Not shown: 997 closed ports
PORT STATE SERVICE
22/tcp open ssh
80/tcp open http
最后sudo ufw status
To Action From
-- ------ ----
22 ALLOW Anywhere
80 ALLOW Anywhere
443 ALLOW Anywhere
80/tcp ALLOW Anywhere
22 (v6) ALLOW Anywhere (v6)
80 (v6) ALLOW Anywhere (v6)
443 (v6) ALLOW Anywhere (v6)
80/tcp (v6) ALLOW Anywhere (v6)
端口80在localhost上打开，但未在域名/ public ip
上打开