Posts Tagged cisco

Solution for Cisco VPN Error 51

Posted by therider in Mac on July 31, 2010

The Cisco VPN client occasionally shows an error dialog on a mac (Error 51: Unable to communicate with the VPN subsystem) when I attempt to start it, when the internet is working just fine. I found the fix in the following link which worked like a charm.

Cisco VPN – Fix for Error 51

Specifically, this one line command did the trick for me:

$ sudo kextload /System/Library/Extensions/CiscoVPN.kext

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