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The following guide describes how to install UFW Firewall on Ubuntu 20.04. Everything is done with a few clicks in the console.

At the beginning we update the packages

sudo apt update

We install UFW

sudo apt install ufw

The service status can be checked by issuing a command:

udo ufw status verbose

Score:

Status: inactive

We will launch the UFW with the help of a command:

sudo ufw enable

We can also install a graphical firewall management package, the whole thing can be done by issuing a command

sudo apt install gufw

To unblock a given port or service we issue a command:

sudo ufw allow NAZWAUSŁUGI

Here are some examples:

SSH:

sudo ufw allow ssh

Http

sudo ufw allow http

You can also allow access for a given port along with the protocol. An example below:

sudo ufw allow 80/tcp