Moving Wan Port - 2 Bridges

RouterOS Beginner Basics
1

Hoping I can make myself clear on this one, first the attached diagram is super quick and is there to make it easier to understand my setup. At the moment, on my mikrotik I have two bridges.

Bridge 1 includes ports 2-5 and connect to the router. All these are in the same subnet.
Bridge 2 includes port 7-10 and WLAN and connects directly to the firewall and goes out to the internet.
I have moved the “WAN” port to port 6 because I can. I want Bridge 2 traffic to go out ethernet 6 to get to the internet.

At the moment this works, but in order for me to do this I had to add ethernet 6 to bridge 2 to allow communication to the internet. Should I have to add ethernet 6 to allow internet traffic for bridge 2? If not, can someone just tell me the components that are needed to allow this to function correctly.
network.png

2

Very confusing, do you have two routers one being used simply as a firewall.
Is it.
ISP --------->Router as a firewall---------------->MT Router------------------> Devices??

If so is your intention NOT to use firewall rules on MT router?
If so is it your intention to DO or not TO DO double NAT?
Is the second MT router acting as a router, really only acting as a switch??

In other words, best to concentrate on one mind, and one bridge! :wink: