How to turn off the firewall function in Linux system

Steps to turn off the firewall in Linux system: Identify the firewall service (use systemctl list-unit-files | grep firewalld command); Stop the firewall service (use sudo systemctl stop firewalld command); Optional: Disable the firewall service so that it The system will no longer start automatically after restarting (use the sudo systemctl disable firewalld command); verify the firewall shutdown status (use the sudo firewall-cmd --state command, if the output is "not running", the shutdown is successful).

How to turn off the firewall function in Linux system

Turning off the firewall function in Linux system is very simple and can be done through the following steps:

Step 1: Identify the firewall service

First, you need to identify the firewall service running on the system. This can be done with the following command:

<code>systemctl list-unit-files | grep firewalld</code>

If it is an Ubuntu or Debian system, the output should be similar to the following:

<code>firewalld.service               loaded active running   firewalld - dynamic firewall daemon</code>

If it is a CentOS or RHEL system, the output should be similar to the following:

<code>firewalld.service              loaded active running   firewalld - firewalld daemon</code>

Step 2: Stop the Firewall Service

Once the firewall service is identified, you can stop the service using the following command:

<code>sudo systemctl stop firewalld</code>

Step 3: Disable the firewall service (optional)

If you want the firewall to no longer start automatically after the system is restarted, you can disable the firewall service:

<code>sudo systemctl disable firewalld</code>

To verify that the firewall is turned off successfully, you can check the firewall status using the following command:

<code>sudo firewall-cmd --state</code>

If the output is "not running" , indicating that the firewall has been successfully closed.

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