Ok well I have seen many posts about people who had previous problems with the program leaf. For those of you who may not know what leaf is, it is a program that allows two users to share one private connection allowing you to get into the same system link matches.
Okay so let's begin shall we?

Requirements-
1.Leaf which can be found [ Register or Signin to view external links. ]
2.Xbox 360
3.Computer with an empty cat5e slot
4.Router or modem
5.A good ping 30 is decent for most
6.2 cat5e network cables
1-Begin by pluging the two cat5e cables into your router or modem and plug one into your xbox 360 and computer

2-Start up leaf and make an account. I already have one so I will sign in. For most of you click the make a new account on the bottom left corner

[ Register or Signin to view external links. ]

[ Register or Signin to view external links. ]

3-Onced logged in click add member which is located on top. A new window should pop up, right under the members box click add member . Now a second window pops up. In this window add the id on the person you want to add and the rest is self explanitory.

[ Register or Signin to view external links. ]

[ Register or Signin to view external links. ]

[ Register or Signin to view external links. ]

4-Now click on the share tab and click on permissions right next to the xbox lol. Then check the person the box next to the name of the person you added. After that click done and you should be done.

[ Register or Signin to view external links. ]

[ Register or Signin to view external links. ]

[ Register or Signin to view external links. ]

Additional information- If leaf does not function properly or fails to connect when you sign in cick (This is where the download link will be) to download my tutorial on how to open your ports. This should fix your problem.