Check firewall status:
firewall-cmd --state
stop/restart/start firewall
systemctl stop firewalld.service
systemctl restart firewalld.service
systemctl start firewalld.service
Disable/enable firewall startup on boot
systemctl disable firewalld.service
systemctl enable firewalld.service
Query which ports are open
firewall-cmd --list-port
Query whether a port is open, such as 1010
firewall-cmd --query-port=1010/tcp --permanent
Open a port, such as 9090
firewall-cmd --zone=public --add-port=9090/tcp --permanent
firewall-cmd --reload # 重新加载配置
–zone #Scope
–add-port=9090/tcp #Add port, the format is: port/communication protocol
–permanent #Permanently, it will be invalid after restart without this parameter
Close a port, such as 1010
firewall-cmd --zone=public --remove-port=1010/tcp --permanent
firewall-cmd --reload # 重新加载配置
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