There are 4 laptops connected to a wireless router in my house,which is using NAT.Is there any tool to know how much bandwidth each laptop is using and what data is flowing through the router and not just my own laptop?
Looking at your router's manual, it appears not to have any monitoring features. The only thing it allows you to do is email web access logs to a specified email address.
Therefore, you will either have to get another router with such features or use a suitable wireless sniffing tool like Kismet. The disadvantage of the latter option is that you will only be able to capture data when the "capturing" computer is running.
I just wanted this for my personal use at home....Kismet requires Airpcap which is not a freeware....Can u please suggest some freeware for the same purpose...I am just curious to learn how these things work.