Set RouterOS as Transparent Bridge firewall

Transparent (Network Bridge) firewall is characterized by the user is not aware of the existence of firewalls. And this approach works best for networks that have already been built. You can add a firewall without making any modifications to the original network structure.

First add a "bridge"

　　

Then set up the bridge

　　

Add the required network interface to the actual situation

　　

Then set the firewall rules

　　

This way the Network Bridge firewall is complete with the basic configuration. Other settings can be set according to the specific situation.