Delete - Undo bridge interface br0

Question

Good morning and thank you in advance. 
 It's not the first time I've talked about this topic and you haven't been able to solve the problem. 
 My problem is that when configuring the Firewall for the first time, I configure an interface in bridge mode (br0) that contains the physical interfaces 1, 3 and 4. 
 
 Which 3 and 4 does not let me detach from the interface in bridge mode. 
 
 I would like to know how I can remove this configuration, leaving only port 1 for the LAN zone. 
 Since interfaces 3 and 4 are unusable. Obviously without affecting the rest of my configuration

Keyur · Accepted Answer

Hi PaLmd Unfortunately, the removal of the bridge will result in network disruption to your clients. Prior to performing this, ensure that you still have access to the device via the WAN port or via Console access. Interfaces added in the Bridge Pair cannot be removed directly, you have to remove bridge configuration.

lferrara · Answer

You need to perform this task via Webadmin page. No way to do it via cli. As suggested, you can enable webadmin on wan port, remove the bridge and create a new interface. Once you can reach the internal interface ip, disable the WAN device access Web admin option. 
 Thanks

PaLmd · Answer

Steps to undo BRO:
- Connect to the sophos via WAN access
- Eliminate The Bridge (without fear).
When you make this option the configuration of the interfaces is lost.
-Configure the port(s) with the cofiguration you want.
We already have br0 undone.