How to enable and disable the firewall on Ubuntu

Ubuntu comes with default firewall (already installed) called UFW. UFW stands for Uncomplicated Firewall.

Step 1 : To install the ufw firewall on ubuntu if not installed already, execute the below command:

first update the apt package

$ sudo apt-get update

Output something like the below screenshot :-

Now run below command on terminal to install ufw firewall

$ sudo apt-get install ufw

Output something like the below screenshot :-

Step 2 : To check the status of the ufw, execute the below command:

$ sudo ufw status

Output something like the below screenshot :-

Step 3 : To enable the ufw firewall on ubuntu, execute the below command:

$ sudo ufw enable

Output something like the below screenshot :-

Step 4 : To disable the ufw firewall on ubuntu, execute the below command:

first update the apt package

$ sudo ufw disable

Output something like the below screenshot :-

Step 5 : If you need to reload ufw (reload rules), execute the below command.

$ sudo ufw reload

Output something like the below screenshot :-