block port for specific queue

RouterOS Beginner Basics
1

Hi all

I need to block a port i.e 12000 for each queue that is i.e. 100 kb

any help

2

use mark in firewall

3

yes I did like this

ip firwall filter> add chain=forward protocol=tcp dst-port=12000 connection-rate=0-101372 action=drop

it works fine, but when i change the queue by increasing the speed it won’t unblock the port, any help please