Error 51: Unable to communicate with the VPN subsystem from VPNClient (fixed)

For work, the good days of using Tunnelblick are over, and I’m now using the Cisco VPNClient.

Today it greeted me with a message:

Error 51: Unable to communicate with the VPN subsystem.
Please make sure that you have at least one network interface that is currently active and has an IP address and start this application again.

The thing is, I already had the wireless going, and it had an IP. Macworld tells me to do:

sudo SystemStarter restart CiscoVPN

You can also do:

sudo /System/Library/StartupItems/CiscoVPN/CiscoVPN restart

They both work. Let’s hope this is not a regular recurrenceannoyance.


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