我正在使用BackToMyMac从我的家用mac ssh到我的工作mac。有时它会起作用，有时则不起作用。当它不起作用时，它根本无法连接。多次我能够连接，做一些工作，断开连接，然后尝试连接一小时后再无法连接。我确信这不是因为电脑处于睡眠模式。
如何诊断此问题？
这是我的ssh输出：
~/>ssh -6 -vvv USER@COMPUTERNAME.ACCOUNTNUMBER.members.btmm.icloud.com
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /Users/USER/.ssh/config
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: /etc/ssh_config line 102: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to COMPUTERNAME.ACCOUNTNUMBER.members.btmm.icloud.com [fd3a:717d:c227:d36b:705f:ef3c:8921:7c56] port 22.
debug1: connect to address fd3a:717d:c227:d36b:705f:ef3c:8921:7c56 port 22: Operation timed out
ssh: connect to host COMPUTERNAME.ACCOUNTNUMBER.members.btmm.icloud.com port 22: Operation timed out