lorax - 11:57 am on Oct 3, 2012 (gmt 0)
I'm not sure how they're doing it but I know that I'd be looking at my log files to see if I can spot an IP address that's been visiting my site a lot. Then I could do something about it. Another thought is to put in some custom PHP code that checks the server's DN or IP and if it doesn't match yours then redirect the user to the correct one and see if that doesn't cause them some issues. But I'm just flipping ideas so take these with a grain of salt.