节点Web应用程序在Linux中启动，但Web服务访问不会提示服务器数据

Question

最近，我租了一台Linux服务器，然后我开发了一个Node.js网络程序。我已打开端口，但仍无法访问此Web服务。

iptables设置如下：

-A INPUT -p tcp -m state --state NEW -m tcp --dport 8080 -j ACCEPT

iptables状态如下：

[root@VAM_60_90_centos firewalld]# systemctl status iptables.service
* iptables.service - IPv4 firewall with iptables
   Loaded: loaded (/user/lib/systemd/system/iptables.service; enabled; vendor preset: disabled)
   Active: active (exited) since Thu 2017-03-02 22:41:10 CST; 11min ago
 Main PID: 22884 (code=exited, status=0/SUCCESS)

Mar 02 22:41:10 VM_60_90_centos systemd[1]: Starting IPv4 firewall with iptables...
Mar 02 22:41:10 VM_60_90_centos iptables.init[22884]: iptables: Applying firewall rules: [ OK ]
Mar 02 22:41:10 VM_60_90_centos systemd[1]: Started IPv4 firewall with iptables.

我该怎么做才能解决这个问题？