This article explains how to setup your Sophos UTM so you can create a bridged interface and then configure Web Filtering and Application Control.

Applies to the following Sophos product(s) and version(s)
Sophos UTM 9.2

Configuring Web Filtering and Application Control in bridged mode for a Sophos UTM

https://www.sophos.com/en-us/support/knowledgebase/119360.aspx

Note: the steps to create a bridge interface in this article only apply to UTM 9.2 and prior versions. In UTM 9.3, the process to create bridge interfaces has changed. Please see KB 121532 for instructions on creating bridge interfaces in UTM 9.3, or KB 121560 for general information on other changes in 9.3.

What To Do

Initial setup

Go through the UTM setup as normal (to watch a video of an example setup click here) and ensure that the internal interface is valid for your network. Set the WAN interface up as a 'Standard Ethernet interface with dynamic IP address'. This interface will be removed later to create the bridge.
Once the device has been configured go to 'Interfaces & Routing' | 'Interfaces' | 'Interfaces' tab and delete the external (WAN) interface. This allows for the creation of the bridged interface (br0).
Ensure the internal connection has no default gateway assigned.

Click here for the KB on Sophos Support Site

If you need more information or guidance, then please contact technical support.