Using a Mac Running OS X to Share an Internet Account

Mac OS X includes a built-in DHCP server you can use to share a single Internet connection with other devices on your local network. And if the Macintosh on which you configure the DHCP server includes an AirPort card, you can also provide a wireless AirPort network without the use of an AirPort Base Station.

NOTE

The function of the DHCP server is to provide and manage IP addresses to devices on the network. The DHCP server doesn't actually provide the Internet access itself; that comes from the connection method you use (such as a cable modem). The DHCP server manages the traffic between ...

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