Apple AirPort Networks - Manual (Page 7)

Chapter 1 Getting Started 7
You can share your Internet connection as long as your computer is connected to the
Internet. If your computer goes to sleep or is restarted, or if you lose your Internet
connection, you need to restart Internet sharing.
To start Internet sharing on a computer using Mac OS X v10.5 or later:
1 Open System Preferences and click Sharing.
2 Choose the port you want to use to share your Internet connection from the “Share
your connection using” pop-up menu.
3 Select the port you want to use to share your Internet connection in the “To computers
using” list. You can choose to share your Internet connection with AirPort-enabled
computers or computers with built-in Ethernet, for example.
4 Select Internet Sharing in the Services list.
5 If you want to share your Internet connection with computers using AirPort, click
AirPort Options to give your network a name and password.