This is a guide on how to set UFW on a Ubuntu operating system. In this guide I will show how to allow a couple common ports but this can be changed based on your needs.
Step One: (If not already installed) Install UFW
sudo apt install ufw
Step Two: Add common ports (SSH for connections, DNS for piHole) please do add anymore that you need
sudo ufw allow SSH
sudo ufw allow DNS
sudo ufw allow 82/tcp
Its worth noting writing know items (Such as DNS, SSH, HTTP) is the same as doing:
sudo ufw allow 22/tcp
sudo ufw allow 53/udp
sudo ufw allow 82/tcp
Just makes it easier to remember.
Step Three: Check all that have been added are correct:
sudo ufw show added
Step Four: Enable UFW
sudo UFW enable
If you ever needed to disable the firewall just type
sudo UFW disable
Be sure to check out our other Cyber Security posts for more information:
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