Kanwaljit sab
It is not an ordinary website that is redirecting...it the ISP it self. Technically,this is not redirection at all. They are not allowing the user beyond them to the internet. There is no option either to the user or to the browser to do anything else, since you are not connected to the net by the ISP as yet. It the authentication page which is in ISP server itself. The user is not connected to
www.bsnl.in or even to
www.mail,bsnl.in even if he types these URLs and even in these cases he is redirected to the said page by the ISP.
The problem is not the redirection alone, but the logjam and subsequent unacceptability of internet associated with the process of so called redirection or anything else that is happening.Till the process is complete and the authentication page appears on the screen, net is blocked for the user.