same thing as the title, someone know that?

What?

Maybe you could explain what you mean. I don't think a lot of people understand this.

i think he means How much bandwidth does a dedicated LFS server use up per month..

The answer:

Specifically there is no real specific answer. only estimates, and for estimates you need information (how many people will be on the server, Packs Per Second) etc.

The answer on how to work it out is in this thread: http://www.lfsforum.net/showthread.php?t=9572 (bottom of 1st post)