Some of you corporate or higher education people may have to use “VPN” to access sensitive files from home. For example, my workplace uses Cisco AnyConnect VPN. Unfortunately Mac users got the shaft here. Some of you may have issues connecting to VPN, where you get immediately disconnected. Instruction: 1. Go to System Preferences 2. Go to iCloud or MobileMe depending on which service you have 3. Disable Back to My Mac The reason Back to My Mac conflicts with Cisco VPN is because of an “adapter conflict”. Your computer has a bunch of “network adapters”. Back to My Mac uses a network adapter called utun0. Guess what, Cisco likes utun0 too. So what happens is that when you turn on your computer, your computer immediately uses utun0, making it unavailable. When you try to use Cisco VPN, it will not be able to find utun0 anymore, thus disconnecting you right away.
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Cisco AnyConnect VPN OSX Connection Problem Fix