This video will give an overview of a MikroTik firewall. What rules are there by default, what do these rules do and how to make your own.
00:00 Intro
01:00 Firewall filter rule list
03:14 Firewall chains
06:32 Default rules overview
09:45 Add your first rule
15:56 Blocking webpages with MikroTik RouterOS
20:55 Learning more
Read this guide for more details: https://help.mikrotik.com/docs/display/ROS/Securing+your+router