Error 51 - unable to communicate with the subsystem The Cisco VPN Client support is discontinued for good reason, though. As of Mac OS X 10.6, there is a built-in IPSec VPN feature, so you really don’t need any third party software anymore.

And here’s how you use it:. Open System Preferences Network. You may need to click the “Unlock” button to make changes. Click the plus sign above the lock button. Select VPN in the Interface dropdown. Choose Cisco IPSec as the VPN Type.

Give it a descriptive “Service Name”. Click “Create” Now you’ve created a new VPN connection, but you still need to configure it. If you know all the necessary configuration parameters just go ahead an configure away. More probably though, you have a.pcf file which contains all the configuration. But don’t worry.

First of all, open the.pcf configuration file in your favorite text editor. It should at least contain the following configuration parameters:. Host. GroupName.

Cisco Easy Vpn Client For Mac Mac

encGroupPwd You’ll also need to know your username and password for the IPSec VPN. Enter the configuration value for “Host” into the “Server Address” field, and you username below it. Mac OS automatically prompts you for your password when connecting to the VPN. Now click the Authentication Settings. Enter the “GroupName” found in the.pcf file into the “Group Name” field. Unfortunately you can’t directly copy the “encGroupPwd” into the “Shared Secret” field because it is “encrypted”.

However, exist for getting the clear group password. Enter it into the “Shared Secret” field, and you’re done. If I explained everything correctly, you should now be able to click the “Connect” button, to stop worrying about VPN configuration stuff and finally get back to work:).