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.
★ Root privileges
★ Type the following command: sudo apt install gufw
★ Type Your Password and Press Enter.
How to Use
★ Open 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.