XF 1.2 How do i take my forum offline while i work on it?

I have just installed Xenforo on my server but i want to be able to work on the forum and get it set up without it being viewable at my domain address in the meantime.

I have it installed on my server and when you type in my domain address it takes you to the Xenforo basic forum. I would rather it went to a landing or blank page.

As i am sure you can tell i am quite new to working with forum software and servers.