How to block many IP subnets

RouterOS Beginner Basics
1

Hi,
In a previous firewall system we blocked many subnets using a simple text file which has each x.x.x.x/x or /xx per line.
We are using the RB2011UiAS now.
Example:

x.x.x.x/16
x.x.x.x/24
x.x.x.x/12

Is there a way to just import a file like that? If not, how do we add all subnets in order to block them from our network?


Thanks.

2

create one address-list that contain all subnet you want to block, and add that address list as src-list for forward drop rule…