How to permanently turn off the firewall in centos7

centos7 can turn off the firewall through the console or terminal using commands, through the control panel graphical interface, and through the configuration file. 1. Open the console or terminal of CentOS7; 2. Log in using root user rights or sudo command; 3. Enter the following command to stop the Firewalld service "systemctl stop firewalld"; 4. Enter the following command to disable the Firewalld service: systemctl disable firewalld .

The operating environment of this tutorial: windows10 system, CentOS 7.7 version, DELL G3 computer

CentOS 7 is a widely used Linux operating system , this operating system follows the open source code model and has a high degree of stability and security. On CentOS 7, using a firewall can help us protect our servers from unwanted network attacks and malware. However, sometimes we may need to temporarily turn off the firewall to facilitate a specific network connection or application.

The method of turning off the firewall depends on the service status and personal needs. Here are three common ways to turn off the firewall.

The first method is to turn off the firewall using the command line through the console or terminal.

1. Open the CentOS 7 console or terminal.

2. Log in with root user rights or sudo command.

3. Enter the following command to stop the Firewalld service:

systemctl stop firewalld

4. Enter the following command to disable the Firewalld service and ensure that it does not start automatically after the system restarts:

systemctl disable firewalld

The second method is to turn off the firewall through the control panel graphical interface.

1. On CentOS 7, click the "Activities" button in the upper left corner to open the application menu.

2. Enter "Firewall" in the search bar, and then select "Firewall Configuration" in the search results.

3. In the pop-up dialog box, enter the root user password or sudo password.

4. In the firewall configuration window, click the "On" button in the upper left corner to change it to the "Off" button, and then click the "Ok" button to save the changes.

The third method is by turning off the firewall in the configuration file.

1. Open the CentOS 7 console or terminal.

2. Log in with root user rights or sudo command.

3. Use a text editor to open Firewalld's configuration file firewalld.service:

vi /usr/lib/systemd/system/firewalld.service

4. In the opened configuration file, find the "ExecStart" line and add the following parameters at the end :

--nofork --nopid

The modified line should be:

ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS

5. Save and close the configuration file.

No matter which method you use to turn off the firewall, you need to remember that turning off the firewall increases the risk of exposing the server to potential security threats. Therefore, we should carefully choose whether to turn off the firewall on the basis of ensuring the security of the network and applications. .

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