NB: Piracy is a crime.
In India many ISP's are blocking torrent sites. The main reason is heavy downloads and loss to ISPs and another reason might be piracy. But what to do if i have to download Ubuntu over torrent? Its legal and i have the right to do it. Here is one of the way you can do. We are going to switch our network to a secured VPN. To do that download Hotspot Shield. Just install it and do the required steps as old by the software and done. Just enable it and voila all your sites are accessable. HotSpot shield running on Mac: 
Extras: You can use it in your IOS or Android mobile also.