I recently found that mikrotik allow multiple registration for multiple clients with SAME mac-address and only 1 registration shown

[MT-wireless ap-bridge]
|_____[00:11:22:33:44:55 = 1st client]
|______[00:11:22:33:44:55 = 2nd client (mac clone)]
|_______[00:11:22:33:44:55 = 3rd client (mac clone again!!)]

but mikrotik only detect 1 registration in /interface wireless registration print
How to prevent this??

NOTE : MT-wireless => mode=ap-bridge
default-authentication=no
default-forward=no

Use authentication in addition to wireless security.

What is your client config?
If it is a ROS client, then did you remember to dst-nat the wireless interface?

@jwcn
I don't want to use WEP/WPA

@tgrand
client is not ROS, it's senao/jaht ap

I was referring to pppoe or the likes.