Вопрос, почему не работает это правило на DHCP starvation attack prevention
/interface bridge filter add action=jump chain=input jump-target=dhcp1 packet-mark=dhcp packet-type=broadcast
/interface bridge filter add action=return chain=dhcp1 limit=1,3
/interface bridge filter add action=drop chain=dhcp1
/ip firewall mangle add action=mark-packet chain=prerouting dst-port=67 in-interface=local new-packet-mark=dhcp passthrough=yes protocol=udp src-port=68