Server

You can't

lol....What are you talking about?

You should use your computer as a Dedicated server with at least 100 Mbps speed and it should be on 24/7 for everybody to play

You can't do that either.

I know. I am just saying what he have to do for making a server in his own computer

You can't make a server in your own computer for P4F.. What you are saying is not relevant at all.

I know we can't make a server for BFP4f with our computer.

But making our computer and a general purpose server is possible

So, They have licences for hosting this game on their server.

Server files were leaked once time they was hosted on Megaupload and now they are deleted.

Just if you want your own server, Rent a server.