Linux 如何在centOS中打开端口
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How to open port in centOS
提问by Niraj Chapla
I have installed and web application which is running on port 8080 on centOS. I only have command line access (through putty) to that machine. I have tried to access that application from my windows machine from which I am connected through putty, but it is giving connection time out error.
我已经安装了在 centOS 上的端口 8080 上运行的 Web 应用程序。我只有命令行访问（通过腻子）到那台机器。我试图从我通过腻子连接的 Windows 机器访问该应用程序，但它给出了连接超时错误。
Then I have tried to open port 8080. I have added following entry into the iptables.
然后我尝试打开端口 8080。我在 iptables 中添加了以下条目。
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT
After adding this into the iptables I have restarted it with -
/etc/init.d/iptables restart
将其添加到 iptables 后，我已重新启动它 -
/etc/init.d/iptables restart
But still I am not able to access that application from my windows machine.
但是我仍然无法从我的 Windows 机器访问该应用程序。
Am I doing any mistake or missing something?
我做错了什么或遗漏了什么吗？
采纳答案by jabaldonedo
First, you should disable selinux, edit file /etc/sysconfig/selinuxso it looks like this:
首先，您应该禁用selinux，编辑文件/etc/sysconfig/selinux，使其看起来像这样：
SELINUX=disabled
SELINUXTYPE=targeted
Save file and restart system.
保存文件并重新启动系统。
Then you can add the new rule to iptables:
然后您可以将新规则添加到iptables：
iptables -A INPUT -m state --state NEW -p tcp --dport 8080 -j ACCEPT
and restart iptables with /etc/init.d/iptables restart
并重新启动iptables /etc/init.d/iptables restart
If it doesn't work you should check other network settings.
如果它不起作用，您应该检查其他网络设置。
回答by Nirojan Selvanathan
The following configs works on Cent OS 6 or earlier
以下配置适用于 Cent OS 6 或更早版本
As stated above first have to disable selinux.
如上所述，首先必须禁用selinux。
Step 1nano /etc/sysconfig/selinux
步骤 1nano /etc/sysconfig/selinux
Make sure the file has this configurations
确保文件具有此配置
SELINUX=disabled
SELINUXTYPE=targeted
Then restart the system
然后重启系统
Step 2
第2步
iptables -A INPUT -m state --state NEW -p tcp --dport 8080 -j ACCEPT
Step 3
第 3 步
sudo service iptables save
For Cent OS 7
对于 Cent OS 7
step 1
第1步
firewall-cmd --zone=public --permanent --add-port=8080/tcp
Step 2
第2步
firewall-cmd --reload
