firewall filter rules and nat

RouterOS Beginner Basics
1

can you tell me basic filter rules and nat ?

i am using mikrotik routeros 3.20 with hotspot and usermanager.

2

http://www.mikrotik.com/testdocs/ros/3.0/qos/filter.php
http://www.mikrotik.com/testdocs/ros/3.0/qos/nat.php
Your request is rather vague.