In this article I want to demonstrate how you can setup QoS on a WatchGuard firewall.
QoS means Quality of Service and means reserving a certain amount of bandwidth for certain types of traffic.


First we have to enable QoS on the firewall.
Since QoS is a quite resource heavy feature it is disabled by default.

Go to Setup > Global Settings…

Here you change to the Networking tab and select Enable all traffic management and QoS Features

When defining a new firewall rule, lets say a Any rule, we can change to the Advanced tab and define Traffic Management Actions.
Here we can choose Maximum bandwidth, think of a rule only triggered by YouTube, or Guaranteed bandwidth for things like voice.