Follow the guide here for firewalling/hardware offloading:
http://forum.mikrotik.com/t/how-to-edge-router-and-bng-optimization-for-isps/150007/1
Follow the guide here for firewalling/hardware offloading:
http://forum.mikrotik.com/t/how-to-edge-router-and-bng-optimization-for-isps/150007/1