Hi,
I have dir 600l router and my doubt is can I restrict any one machine which connects to my router? Ex, one of my friend comes to my home and connects to my router and updates all his apps in his mobile, and this takes some MBs of data. I have his mobile's mac address and I have added it to reservation also. So, he gets only one IP to his mobile always. Now can I restrict network usage to my friend's mobile? I have enabled traffic control and updated download bandwidth manually and upload bandwidth manually settings. I was thinking, at download bandwidth manually and upload bandwidth manually I have to enter my ISP connection speed and at the traffic control rules option(which is at the bottom) I enter my frnd's ip address and set option to gurantee minimum bandwidth and set value as 15 kbps etc.. My internet package is 4MBPS. Please check the image here:

Can someone please help..
Chaitanya.