Centos7 use firewalld to open and close the firewall and Port

Centos7 use firewalld to enable and disable firewall and Port 1. Basic use of firewalld start: systemctl start firewalld Disable: systemctl stop firewalld view status: systemctl status firewalld enable: systemctl disable firewalld enable: systemctl enable 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 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 to view the region of the specified interface: firewall-cmd -- Get-zone-of-interface = eth0 reject all packets: firewall-cmd -- panic-on cancel rejection status: firewall-cmd -- panic-off check whether the request is rejected: firewall-cmd -- Query-panic how to enable a port and add firewall-cmd -- zone = public -- add-Port = 80/tcp -- Permanent (-- Permanent takes effect permanently, this parameter does not expire after restart) reload firewall-cmd -- reload view firewall-cmd -- zone = public -- Query-Port = 80/tcp delete firewall-cmd -- zone = public -- remove-Port = 80/tcp -- permanent

Centos7 use firewalld to open and close the firewall and Port