The CiscoVPN client (v4.9.01.0100) for Apple OSX throws an error every once in a while. Mainly when I just rebooted, or when I was forced to quit some hanging application (which also occurs on Macs). The error is:
Error 51: Unable to communicate with the VPN subsystem
Somehow, the VPN software looses contact with the network adapter (wired AND wireless). After this there are two things you can do;
- Reboot
- or restart the Cisco VPN Service manually.
The first is kinda obvious (it's almost a MS Windows strategy :)). The second one is done via the Terminal (Finder -> Applications -> Utilities -> Terminal). Just type the following command (followed by your password);
sudo /System/Library/StartupItems/CiscoVPN/CiscoVPN restart
The thing I don't understand is; Why hasn't Cisco incorporated this in the VPN client?
IF (Error 51 == TRUE)
DO CiscoVPN.restart
It seems that this 'bug' is present since the release of the Mac OSX version of the software.