>>What's their ip address? We could all ping them 10000 times as a group.
>
>The source is using a very smart application to hit the site. Once I block the related route, they start over with another route. And, that is done in the next second. So, it is being hit on a very slow interval. Then, if not being detected, the refresh interval is increased. Yesterday, again, I had to spend several hours to counter attack those attacks. I really do not know who is being this. But, this is starting to be very annoying. Today, we are still working on it.

May be your site is just one in the list of sites this attack is against.