Good day.

Default configuration.
WAN = ether1, LAN = Bridge1, NAT

Rule:
/ip firewall mangle
add chain=forward in-interface=ether1 log=yes out-bridge-port=wlan1 out-interface=bridge1

Counter of packets = 0, log is empty.

Laptop is connected to wlan1, internet works fine.

Why it's not work?

ps:
/ip firewall mangle
add chain=forward in-interface=ether1 log=yes out-bridge-port=wlan1

doesn't work too.


Config:

ros code

/ip address
add address=192.168.113.1/24 comment="default configuration" interface=bridge1 network=192.168.113.0
add address=84.5*.*.*/26 interface=ether1 network=84.5*.*.*

/interface bridge
add admin-mac=D4:CA:6D:63:35:5A auto-mac=no mtu=1500 name=bridge1 protocol-mode=none

/interface bridge port
add bridge=bridge1 interface=ether2
add bridge=bridge1 interface=ether3
add bridge=bridge1 interface=ether5
add bridge=bridge1 interface=ether4
add bridge=bridge1 interface=sfp1
add bridge=bridge1 interface=wlan1
add bridge=bridge1 interface=ether8

/interface bridge settings
set allow-fast-path=no use-ip-firewall=yes use-ip-firewall-for-vlan=yes

/ip firewall nat
add action=masquerade chain=srcnat out-interface=ether1 src-address=192.168.113.0/24

Can you please tell us what you are trying to do?

If you want to see the traffic from your laptop to another port in the bridge than you need to use:
However if you are trying to log traffic between your internal network (bridge) and the internet you don't need the bridge firewall.
You simply use this:
If you need to reverse direction just swap the in and out interfaces.

Make sure not to leave the default action of accept otherwise you will accept all traffic either way!
Passthrough will work or you can choose the action log as well.

Can you please tell us what you are trying to do?

Global target is different shaping of ports-in-bridge.

I want to mark packets from WAN side to specific port-in-bridge (and back).

I use simple rule for this purpose.

ros code

/ip firewall mangle
add chain=forward in-interface=ether1 log=yes out-bridge-port=wlan1 out-interface=bridge1

But it's not work.

(I am not mark packets in this rule, i just want to see their count, as first step to global target)