How to add a port to the CentOS firewall?

6 months ago

Liam

2 minutes

To add firewall ports in CentOS system, you can use the Firewalld firewall management tool. Here is how to add ports using Firewalld in CentOS system.

Ensure that the Firewalld service has been started and is running. You can use the following command to check the status of the Firewalld service:

sudo systemctl status firewalld

Add the port you want to open using the following command, for example, to add port 80.

sudo firewall-cmd --zone=public --add-port=80/tcp --permanent

This will permanently open TCP port 80 in the public area.

Reload the Firewalld configuration to apply the changes.

sudo firewall-cmd --reload

You can use the following command to view the list of open ports:

sudo firewall-cmd --list-ports

By following the steps above, you can use the Firewalld firewall management tool to add ports on a CentOS system.