Not sure if it is the best place to ask but I really need your help.
In the past I had setup a website but due to DDOS attack, people wasted a lot of bandwith on my server.
Now I want to build a ftp server that is "bandwith proof", so user is required to register to access my files. This way I can ban user who try to wast my bandwith.
But files on my server is a bit large, should I use ftp instead? If yes, how do people register?
What software can do this kind of function?