Bridge Interface setup

Question

Hello, 
 What would be the best approach to bridge my spare interfaces to the current LAN port. 
 I have two spare ports and would like to add additional switches on them but i require them to function and setup as the current working LAN port. 
 I have a IP assigned with DHCP on the current LAN port and also a VLAN created for the guest access. 
 Thanks

DouglasFoster · Answer

Assuming your existing config has 2 interface (inside and outside), then you need 3 unused interfaces to create a bridge. Suppose your inside interface is 192.168.*.* 
 
 If you have any objects that are hard-coded to an interface, now is the time to change them to <any>. Locked objects are a bad idea anyway. 
 One unused interface will be for your laptop, so that you have connectivity to create the bridge. Suppose it uses 10.10.10.10 
 Two unused interfaces are needed to create a two-NIC bridge. 
 Once the bridge is created, you simply move addresses to the bridge, and the original inside interfaces becomes unused. 
 Once the configuration is stable, you don't need the laptop interface any more either, but it might be nice to keep it around for an emergency. 
 
 If you do not have three unused interfaces, you will need to recreate the configuration from a factory load, one item at a time. 
 Linking the switches to each other is probably easier. If the switches are recent vintage, the performance impact of the extra hop should be trivial.

Joe DeVito · Answer

This explains how to bring interfaces but i want to bridge the inside and outside interface to pass all L2 traffic through. Look at the follow diagram showing the PC as the Sophos UTM gateway

BAlfson · Answer

Is your problem with web browsing, Joe? If so, then set Web Filtering into 'Full Transparent' mode. Was that it? 
 Cheers - Bob