Sophos XG behind/ parallel to WLAN Router, Setup? Bridge Mode?

Question

hi community, 
 i have a vodafone station wlan router/ modem and want to setup a spare pc in order to run sophos xg home. 
 is there a possibility to run the sophos xg parallel (behind) the wlan router in order not to change the wlan router settings? 
 i would prefer not to change the wlan router into bridge mode, but let it run as my wlan router and connect my wlan devices to that wlan router. 
 how would i implement the sophos xg? i can setup it into bridge mode, but i do not want to set up another wlan access point behind the sophos xg. 
 can i setup the sophos xg so that i intercepts the traffic in bridge mode, whilst the wlan devices keep connecting to the wlan router? or is that not possible? 
 
 setup: 
 
 wlan router/modem lan port <-- sophos xg (bridge mode?) 
 ^ | wlan devices 
 
 or do i have to change it to: 
 
 router/modem lan port (deactivate wlan) <-- sophos xg (bridge mode?) --> spare wlan ap <-- wlan devices 
 
 i want to use the sophos for web filtering and firewall

Juan Michel · Answer

Hi. 
 If you want to use the web filtering, then you need to use Sophos Firewall as gateway mode and there's no need to change settings on your wlan-router the diagram will be something like this: 
 
 And make things like configure web policy and add it to a Firewall rule, setting DHCP on Interface configured to WIFI zone, and stuff like that.