Incorrect time causing Back To My Mac to fail
Users may experience an issue where Back To My Mac fails to work, even though another computer on the same network may be able to use the BTMM function without any problems. According to a recent post on Mac OS X Hints, this issue could be related to an i
Back To My Mac uses IPsec to secure IP communications to authenticate and encrypt data streams. The article on Mac OS X Hints relays:
"IPsec tunnels require endpoints to have their clocks synced, or at least to be set to times that are relatively close to one another. "
Thus, if the time is significantly different on the computer you wish to use Back To My Mac with, the protocol will fail.
Possible fixes
Users have reported that the ?time.apple.com? server (Apple's auto-update time server) has repeated issues, especially concerning Back To My Mac. To resolve the issue try one of these different time servers:
1. Navigate to System Preferences > Date & Time
2. Check the box for "Set date & time automatically:"
3. Choose a different selection from the drop-down menu:1. time.asia.apple.com4. Restart Back To My Mac.
2. time.euro.apple.com
Resources
Read the Mac OS X Hints article about incorrect time cause Back To My Mac to fail.
Read this Wikipedia entry regarding IPsec.
Experiencing problems? Have feedback? Let us know!
Resources