ufw (uncomplicated firewall) ist eine [[firewall|Firewall]] für [[linux|Linux]].

<code>
ufw enable|disable
ufw status

ufw app list
app info APP

ufw allow 22
ufw allow 22/tcp
ufw allow APP

ufw delete allow 22
ufw delete allow 22/tcp
ufw delete allow APP
</code>

=====Links=====

  * https://www.digitalocean.com/community/tutorials/ufw-essentials-common-firewall-rules-and-commands
  * https://wiki.ubuntuusers.de/ufw/