Change FreeRADIUS Default Port Number

Greetings Experts I often notice attacks on our FreeRADIUS server. To stop these attacks, i am thinking to change the default authentication port from 1812 to something different. 1.) Is it correct thing to do ? 2.) Would it even help ? Stop or reduce fake auth attempts ? 3.) How do we modify the default port to set different port for FreeRADIUS? Thanks / Regards --RM