====== Resources ======

  * https://www.digitalocean.com/community/tutorials/ufw-essentials-common-firewall-rules-and-commands
  * https://linuxize.com/post/how-to-setup-a-firewall-with-ufw-on-ubuntu-20-04/
  * https://wiki.archlinux.org/index.php/Uncomplicated_Firewall

====== Show Current Rules ======

  * [[linux:distros:ubuntu|Ubuntu]]

===== List =====

****

  sudo ufw status

===== Numbered =====

****

  sudo ufw status numbered

====== Show Supported Apps ======

  sudo ufw app list

  Test

====== Get App Info ======

  * Change ''x'' to an app listed in above command

  sudo ufw app info x

  sudo ufw app info 'CUPS'

====== Limit Connections ======

  * TODO: What does limit actually do?

  sudo ufw limit ssh

====== Allow Specific Port/Protocol ======

  * ''22'' is the port number and ''tcp'' is the protocol
  * ''udp'' can be a protocol

  sudo ufw allow 22/tcp

====== Ubuntu Deny All and Allow SSH ======

****

  sudo ufw reset && sudo ufw default deny && sudo ufw logging off && sudo ufw allow 'ssh' && sudo ufw limit 'ssh' && sudo ufw enable && sudo systemctl enable 'ufw'