I recently purchased two Sophos SG 125 V2s with OPNsense. These have several physical (Layer 3) interfaces, which I would like to combine into a bridge. This allows multiple interfaces to be treated like a switch (Layer 2) and assigned to the same network without having to configure each interface individually.

Sophos has a DMZ, a LAN, an HA, a WAN, and several normal Ethernet ports. I would like to set up the Ethernet ports together as a bridge.