Also, I would like to know, how would an ISP come to know that I am sharing my net connection.
I am not sure if I am missing something. But I dont understand why sharing your internet connection would be a problem. Many of browsing centers and IT companies do it.
I tried googling it, but was not able to find any satisfying document on same, on my own. If there is anything on same I would definitely like to read on it. Please assist.
I believe you are going the wrong path. Share the details on how you did the trace route from where(which machine in the network). also provide more details on your netgrear configuration. Did you try resetting your netgear and configuring it from the scratch. I have had some instances where my netgear configuration gets corrupt when there is a power serge or something like that.
Hope it helps