Mac OS X 10.5: Back to My Mac requires AirPort base station or UPnP-capable third-party router
Summary
Mac OS X 10.5 Leopard's Back to My Mac feature is designed to work seamlessly with compatible AirPort base stations. This seamless integration is done through the use of NAT-PMP (NAT Port mapping Protocol) technology, which enables your computer to automatically configure your AirPort base station to provide services between your local network and the Internet.
Some third-party Internet routers use a technology called UPnP (Universal Plug and Play), which is similar to NAT-PMP. Back to My Mac works with both NAT-PMP and UPnP.
Products Affected
Airport Base Station (Dual Ethernet), Airport Express Base Station, Airport Extreme Base Station, Airport Extreme Base Station POE/UL2043, Airport Extreme Base Station/802.11n, Back to My Mac, AirPort Express with 802.11n, Time Capsule, MobileMe
NAT-PMP or UPnP must be enabled
If Back to My Mac isn't working and you use an AirPort base station, NAT-PMP may need to be turned on again.
- Open AirPort Utility (in /Applications/Utilities).
- Click the Internet tab.
- Enable "NAT Port mapping Protocol" under the NAT section.
- Save.
- Close Airport Utility.
If Back to My Mac isn't working and you use a third-party router, make sure UPnP is enabled. Consult the device's documentation or contact the manufacturer for information about enabling UPnP.
Additional Information
For more information about setting up Back to My Mac, see this article.