This is yet another of the posts was lying in my drafts, decided to dust it off and publish it!
Remember that all these assumes that your router is connected to the LAN port, if it’s connected to the USB port, then disconnect it and connect to the LAN port. If you dont have a LAN card, then consider getting one. It’s cheap, costs around Rs. 200. Next, it’s best to have the router configured in pppoe mode.