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

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

CentOS7 use firewalld to open and close the firewall and Port

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

How can I enable a 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