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Linux is the best-known and most-used open-source operating system. As an operating system,

Linux is software that sits underneath all of the other software on a computer, receiving requests

from those programs and relaying these requests to the computer’s hardware.

A Linux distribution is a selection of coordinated software around the Linux kernel, which in some

cases is also a more or less adapted distribution kernel that is usually maintained in close

coordination with Upstream itself.

In computing, a firewall is a network security system that monitors and controls the incoming and

outgoing network traffic based on predetermined security rules. A firewall typically establishes a

barrier between a trusted network and an untrusted network, such as the Internet.

Requirements

• • ★ Root privileges
  • ★ Terminal

Steps to Install Firewall GUI

• • ★ Type the following command: sudo apt install gufw
  • ★ Type Your Password and Press Enter.

 

 

How to Use

 

• • ★ Open Firewall GUFW GUI From your app lists.

 

 

• • ★ The firewall automatically sets the incoming connections to ” Deny ” and the outgoing connections to ” Allow “.
  • ★ if you are operating a server. Set the status to ” ON ” by clicking the slider.

 

 

• • ★ Then click the ” + ” below to create a rule. 

 

 

• • ★ Now Click On Simple Method
    

 

 

• • Select your Desired Name and then Set Policy, Direction, Protocol, And Port.

 

 

• • ★ Select a service or program for which connections should be allowed or denied. Once the rule has been created, click on ” Add “.
  • ★ Check the status of the firewall in the overview. Here you can also choose from the ” Report ” and ” Protocol ” tabs.
  • ★ Finally, you can see your settings in Rules Overview.