CentOS7 use firewalld to open and close the firewall and port, centos7firewalld

CentOS7 use firewalld to open and close the firewall and port, centos7firewalld

1. Basic use of firewalld
Start: systemctl start firewalld
View status: systemctl status firewalld
Stop: systemctl disable firewalld
Disable: systemctl stop firewalld

2. systemctl is the main tool in CentOS7 service management tools. It integrates the functions of previous services and chkconfig.
Start a service: systemctl start firewalld. service
Disable a service: systemctl stop firewalld. service
Restart a service: systemctl restart firewalld. service
Displays the status of a service: systemctl status firewalld. service
Enable a service at startup: systemctl enable firewalld. service
Disable a service at startup: systemctl disable firewalld. service
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 failed services: systemctl-failed

3. Configure firewalld-cmd

View the version: firewall-cmd-version
View help: firewall-cmd-help
Display status: firewall-cmd-state
View All opened ports: firewall-cmd-zone = public-list-ports
Update firewall rules: firewall-cmd-reload
View region information: firewall-cmd-get-active-zones
View the region of the specified interface: firewall-cmd-get-zone-of-interface = eth0
Reject all packages: firewall-cmd-panic-on
Cancel rejection status: firewall-cmd-panic-off
Check whether the request is rejected: firewall-cmd-query-panic

4. Enable the port
Add
Firewall-cmd-zone = public-add-port = 80/tcp-permanent)
Reload
Firewall-cmd-reload
View
Firewall-cmd-zone = public-query-port = 80/tcp
Delete
Firewall-cmd-zone = public-remove-port = 80/tcp-permanent