One of my friends has read the article on MAC Filtering and inquired an easy way to find out the MAC addresses of the devices. This the easiest I came across so far.
You need to log into the admin panel of the router, find the place which shows the connected/ (or history of the connected devices). It gives the list of MAC addresses along with some identification. (Eg: in my routers home page it shows the device history with MAC addresses and an identification tag, it says AA:BB:CC:DD:EE:FF and iPhone, so I figured out it is my wife’s. The dumbest thing in my home, ohhh no not the wife I meant, but the iPhone)
Get the list and add it to the MAC filter. It is simple.
Any better idea? Please comment !