The QoS2 service5.2 (Figure 5.11) in IPBrick allows the customisation of traffic priority levels, oriented to the external interface, thus assuring a certain level of quality of the service for the final user. It is important to indicate immediately the value of the band width available in the connection for the internet. From these data we can establish priority rules among the several types of traffic in a network. for example: instead of the internet connection being entirely occupied by the email service, limit the band width given to that service and assure a minimum value for the web traffic.