Back to My Mac may not work as expected with AirPort Extreme Gigabit Ethernet
Symptoms
If the computer you are attempting to connect to via Back to My Mac is connected to the Internet through an AirPort Extreme Gigabit Ethernet base station, the connection may not be successful.
This can occur even if you have enabled NAT-PMP.
Products Affected
Airport Extreme Base Station, Back to My Mac
Resolution
Install the Time Machine and AirPort Update (via Software Update), and also update the firmware on your base station to 7.3.1 (by opening AirPort Utility).
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