Uncomplicated Firewall (UFW) is an easy and beginner friendly firewall for linux systems.

Install

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sudo apt-get update  
sudo apt-get install ufw  

Verify Install

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sudo ufw status

Basic Blocks

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sudo ufw default deny incoming  
sudo ufw default allow outgoing

Enable Firewall

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sudo ufw enable

Blocking Ports

you can block any port by “sudo ufw deny PORT” for example, to block port 76 type:

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sudo ufw deny 76

Allow Ports

you can allow any port by “sudo ufw allow PORT” for example, to allow port 22 (default SSH port) type:

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sudo ufw allow 22

Video

Right click and check “Show all controls” to see video controls*

Conclusion

For a home base user UFW is more than enough. Play around with UFW to learn more, “sudo ufw -h” is the wayyy :)

that’s it ✌🏽