I want to buy a virtual server, ali as a server, and then to the inside of the circle of friends to share some big files, not copy to copy, when you download each other, share resources, are shown on the server (web site developed by oneself, no problem), like download, film is in the Shared disk, best can see how much upload and download flow, the client can set up the upload speed, file content to p2p, Intranet users also can penetrate, server need not too expensive, so domestic everyone is more access to the Internet through a router, in Intranet, thank you!