mikrotikq Stop Scanner Winbox

/ip firewall filter

add chain=forward protocol=udp dst-port=5678 in-interface= 

ether2-local-master action=drop disable=no 

add chain=input protocol=udp dst-port=5678 in-interface= 

ether2-local-master action=drop disable=no

add chain=output protocol=udp dst-port=5678 action=drop disable=no