centos Common commands of firewall

Centos7 View the open port corresponding to the firewall

View open ports
firewall-cmd --list-ports

Open port
firewall-cmd --zone=public --add-port=80/tcp --permanent
Command meaning :
–zone # Scope
–add-port=80/tcp # Add port , The format is ： port / Communication protocol
–permanent # Permanent effect , Failure after restart without this parameter

Remember to restart after opening the port

start-up ：
systemctl start firewalld
stop it ：
systemctl stop firewalld
restart ：
systemctl restart firewalld.service
View status ：
systemctl status firewalld
Boot up ：
systemctl enable firewalld.service
Boot disabled ：
systemctl disable firewalld
Check whether the service is started ：
systemctl is-enabled firewalld.service
View the list of started services ：
systemctl list-unit-files|grep enabled
View the list of services that failed to start ：
systemctl --failed
View version ：
firewall-cmd --version
view help ：
firewall-cmd --help
Display status ：
firewall-cmd --state
View all open ports ：
firewall-cmd --zone=public --list-ports
Update firewall rules ：
firewall-cmd --reload
View area information :
firewall-cmd --get-active-zones
View the area of the specified interface ：
firewall-cmd --get-zone-of-interface=eth0
Reject all packages ：
firewall-cmd --panic-on
Cancel reject status ：
firewall-cmd --panic-off
Check whether to reject ：
firewall-cmd --query-panic
to open up 80 port ：
firewall-cmd --zone=public --add-port=80/tcp --permanent
（–permanent Permanent effect , Failure after restart without this parameter ）
see 80 port ：
firewall-cmd --zone=public --query-port=80/tcp
delete 80 port ：
firewall-cmd --zone=public --remove-port=80/tcp --permanent
Open port range ：
firewall-cmd --permanent --zone=public --add-port=8080-9999/tcp // permanent
Reload makes the configuration take effect immediately ：
firewall-cmd --reload

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