3g Transparent Bridge

Hi is it possible to have a 3g USB dongle providing a transparent bridge to all the ethernet ports on a
RB951ui-2hnd?

The 3g USB dongle works fine when the Mikrotik is in router mode I just need to bridge this usb to the ethernet ports
so the client on the Ethernet gets the WAN address.

many thanks

use on firewall nat the netmask function,

you do it easily…

Hi rextended, would you have a Example Code Snippet for a netmask nat rule?
I am trying to do the same as the OP, but I am not able to get it to work.