UFW - Uncomplicated Firewall

Setup using ufw

sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp

sudo ufw enable
sudo ufw status verbose

• Docs
  • https://www.digitalocean.com/community/tutorials/how-to-setup-a-firewall-with-ufw-on-an-ubuntu-and-debian-cloud-server
  • https://help.ubuntu.com/community/UFW