I've tried, and I don't get the same error (I do get a warning about an invalid security certificate, but that is because it is "self-signed").
What do you get from nslookup
rob@eeepc:~$ nslookup students.iiit.ac.in
Try entering the IP address above (18.104.22.168) in the browser's address bar? If this works, but the address lookup fails, it may be that your DNS servers are not set, or not working. You could contact your ISP and/or use the OpenDNS servers by entering the following in /etc/reslov.conf
Also, do you have problems with any other web sites?