I changed my ip address (incremented it by 1) and did not change the MAC address.Tried logging in using regular Sify BBand client and it worked!! So are they really binding it at all? Supposedly we had to call them for this to work, but I sure as hell didn't.
hmm.... wonder. Maybe my router (I connect thru a wifi router) is not amenable to their little games eh? The ip the bband client collects is of the comp (192.168.1.100), while the actual IP assigned by Sify is in the router and that is what I incremented.