Guide to Disable Firewall on CentOS 7
Firewalls are an essential component of network security. However, in certain situations, you may need to temporarily disable the firewall on your CentOS 7 Linux system. This guide will walk you through the steps to disable the firewall on CentOS 7.
Step 1: Check Firewall Status
Before disabling the firewall, it’s a good idea to check its current status. To do this, open a terminal and run the following command:
sudo systemctl status firewalld
This command will display the current status of the firewall service. If the firewall is running, you will see the “active (running)” status. If it’s not running, you will see “inactive (dead)”.
Step 2: Stop the Firewall Service
To disable the firewall, you need to stop the firewall service. Run the following command to stop the firewall service:
sudo systemctl stop firewalld
This command will immediately stop the firewall service. You can verify that the firewall is stopped by running the status command again:
sudo systemctl status firewalld
The status should now show “inactive (dead)”.
Step 3: Disable Firewall at Boot
By default, the firewall service will start automatically at boot. To prevent the firewall from starting at boot, run the following command:
sudo systemctl disable firewalld
This command will disable the firewall service from starting automatically at boot. You can verify that the firewall service is disabled by running the following command:
sudo systemctl is-enabled firewalld
If the firewall service is disabled, the command will return “disabled”.
Step 4: Confirm Firewall is Disabled
To confirm that the firewall is indeed disabled, you can try accessing a service or port that was previously blocked by the firewall. If you can access the service or port successfully, it means the firewall is disabled.
Here are some additional commands and information related to disabling the firewall on CentOS 7:
sudo systemctl start firewalld
|Starts the firewall service
sudo systemctl enable firewalld
|Enables the firewall service to start automatically at boot
sudo systemctl reload firewalld
|Reloads the firewall configuration
sudo firewall-cmd --state
|Checks the current state of the firewall
Remember, disabling the firewall can leave your system vulnerable to network attacks. Only disable the firewall if you have a valid reason and take appropriate security measures.
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