Amit;   After reading what you are dealing with further, without a firewall you can not get to where you want to be. The router is not able to offer port or IP restrictions. Not positive, but that is what I suspect.   Using ACL's on your router I do ...

Peter; You have the correct concept but I do not know enough to guide him. A hardware firmware solution or an OS solution. I gave him both. I basically said the same as you did but maybe explaining a bit more logic and concept behind my thought proce...

HOW TO BLOCK A MAC ADDRESS TO THE INTERNET ON A PRIVATE NETWORK.   I'm looking at the same issue for a client. Security and disclosure issues.   Trust me, a difficult model to manage, especially in a large node network. Hardware swaps etc.   I may be...