how can i create a torrent web?

[Mubeen]

i have a vBulletin license. i wanna create a torrent web at that license.
is it legal to create a torrent and upload it at any torrent website like extratorrent.com or www.torrentcrazy.com etc and after that this torrent is added to my web?
it means anyone who will download torrent from my web will actually downloading torrent from that web at which that torrent is uploaded.
is it a good way??? or there is any other way to do this??