Apple Desktop PC Enable Sharing on each Mac you want to access remotely, Set up your home network

If you have a third-party router: Some routers (including integrat- ed—or“all-in-one”—models, which also include a DSL or cable modem) may support NAT-PMP or UPnP technology, but it might not be enabled by default. If you are not sure whether your third-party router device supports NAT-PMP or UPnP, review the user documentation that came with it or contact the manu- facturer.

If NAT-PMP or UPnP technology has been enabled on your router device and you can reach .Mac services, but are unable to use Back to My Mac, check if a firmware update is available for your router.

If Back to My Mac is not working and you use a third-party router, make sure UPnP is enabled. Consult the documentation for your router or contact your ISP (if your ISP pro- vided the device) or the manufac- turer for information about enabling UPnP.

In addition to AirPort Extreme and AirPort Express, Apple has tested Back to My Mac with many third- party routers. For more information about third-party routers that work with Back to My Mac, go to the Requirements section of the Back to My Mac page at www.apple.com/ dotmac/backtomymac.html.

Back to My Mac User’s Guide 4

December 2007

Enable Sharing on each Mac you want to access remotely:

1.While still in the Back to My Mac tab, click Open Sharing Preferences.

2.If Screen Sharing and File Sharing are not already enabled, click the checkbox(es) for one or both.

Important: For added security, you should select the “Only these users” button under “Allow access for” and add your user name to the list. To do so, click the Add (+) button, select “Users and Groups” from the left column, and choose your user name from the column on the right.

Set up your home network

To use Back to My Mac on a home network, Apple recommends an AirPort Extreme or AirPort Express Base Station with NAT Port Mapping Protocol (NAT-PMP) enabled. Alternatively, you may use a third-party Internet router with full support for Universal Plug and Play (UPnP) technology.

Setting up with an AirPort Extreme or Airport Express Base Station

Follow these instructions to verify that NAT-PMP is enabled on your AirPort base station:

1.Open AirPort Utility from the Utilities folder in Applications.

2.Click the Internet button.

3.In the NAT section, verify that Enable NAT Port Mapping Protocol is checked.

4.Click Update, if needed.

5.Close AirPort Utility.