Home>Article>Operation and Maintenance> What is the command to open a port in Linux?
In Linux, the command to open a port is "firewall-cmd --zone=public --add-port=port/communication protocol --permanent"; the "--zone" in this command indicates the role Domain, "--permanent" means that after opening the port, it will take effect permanently. After using this command to open the specified port, you need to restart the firewall to make it effective.
#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.
The command to open a port in Linux is
firewall-cmd --zone=public --add-port=端口/通讯协议 --permanent
It should be noted that we need to restart the firewall after opening the specified port.
Examples are as follows:
1. Open the firewall
systemctl start firewalld
2. Open the specified port
firewall-cmd --zone=public --add-port=1935/tcp --permanent
Command meaning:
--zone #scope
--add-port=1935/tcp #Add port, the format is: port/communication protocol
--permanent #Effective permanently, without this parameter it will be invalid after restarting
3. Restart the firewall
firewall-cmd --reload
4. Check the port number
netstat -ntlp //查看当前所有tcp端口· netstat -ntulp |grep 8888 //查看所有1935端口使用情况·
Recommended learning:Linux video tutorial
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