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Laptop Management

iPhones, iPads and Androids haven’t beaten out the laptops—they’ve joined them. Chances are you are looking for a way to implement total enterprise device management to include smartphones and tablets. Share how you’ll address change among users, devices and applications while preventing security risks.

Laptop Management

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  • bcampbell
    52 posts
    Community Member

    Fix for Cisco VPN Error 51: Unable to communicate with the VPN subsystem

    1 September 2010 (Last edited: 14 June 2012)

    Cisco's VPN Client works pretty good on the MAC OS's.  However, Error 51 seems to be a common error. 

    In order to fix this error try this:


    1. Reboot your MAC.


    2. Quit VPNClient, open a Terminal window, (Applications -> Utilities -> Terminal) and type one of the following:

    (for older versions) sudo /System/Library/StartupItems/CiscoVPN/CiscoVPN restart

    (for newer versions) sudo kextload /System/Library/Extensions/CiscoVPN.kext

    You may be prompted for a password, enter it to continue.

    This will stop and start the "VPN Subsystem".


    3. Repair using Disk Utility

    • Go into your Application - found in your dock (bottom of your Desktop)
    • Go to Utilities – found inside the Applications folder
    • Double-click Disk Utility
    • Select your HD (hard drive) on the left – mine has the default name of “Macintosh HD”
    • On the main screen on the right, at the bottom, find button: “Repair Disk Permissions” (click it)
    • When it is done, you can exit out of this (cmd Q)
    Reboot and try to open Cisco VPN Client again

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