Cisco Vpn Client Macintosh Error 51
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in Mac OS X instead of the CiscoVPN software. Here's a guide that tells you how to convert from CiscoVPN to the native OS X client. cisco vpn client mac error 51 unable communicate vpn subsystem If you are running Cisco's VPNClient on Mac OSX, you might be familiar
Cisco Vpn Client Error 51 Windows 7
with (or tormented by) "Error 51: Unable to communicate with the VPN subsystem". The simple fix is to quit cisco vpn client error 51 windows 8 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 and give your password
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when it asks. This will stop and start the "VPN Subsystem", or in other words restart the CiscoVPN.kext extension. Cisco seems to have problems when network adapters disappear and reappear, something that happens commonly in Wireless or Dial-up scenerios. Sometimes putting a system to sleep, disconnecting an Ethernet cable or simply reconnecting your wireless will cause CiscoVPN to loose track of the network adapters on cisco vpn client firewall the system. Considering that CiscoVPN is typically used by telecommuters, this is an astonishing oversight on Cisco's part. The above hack should side-step all of these issues by causing the CiscoVPN to re-initialize. It makes one ask, why couldn't Cisco have just put the restart into their client? Or a better idea would be to not reinvent the wheel and use the existing IPSec VPN support in OSX! Am I missing something? EDIT: The MacWorld guys came up with a simpler way to do the same thing: sudo SystemStarter restart CiscoVPN Posted by Anders Brownworth Monday, November 13, 2006 7:25 PM Tweet Comments (269) Jeff from Chicago #1 | Friday, March 23, 2007 6:53 AM Thanks for the tip - this worked like a charm. todd from boston #2 | Thursday, March 29, 2007 10:29 AM you the man - thanks! Tony from Carmel from Carmel #3 | Friday, March 30, 2007 6:49 PM Didn't work but rebooted my computer and the problem went away. Steve from Minneapolis #4 | Friday, May 4, 2007 5:30 PM Nice - works to correct the same issue when running Windows on a Mac (restart
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365 Office365 OS X Password Cracking PowerShell Radeon HD 6950 Security Security Center SSH Tips tricks Ubuntu Updates VirtualBox Virtual Disk Vulnerability https://www.warrenheld.com/cisco-vpn-client-for-mac-error-51/ Windows Windows 7 Windows 8 Windows CMD Windows Update Windows Vista http://marc-abramowitz.com/archives/2006/02/11/a-workaround-for-cisco-vpn-client-mac-os-x-error-51/ Windows XP WordPress Stuff April 27, 2012 - Warren Held Cisco VPN Client for Mac OS X "Error 51: Unable to communicate with the VPN subsystem" When you try to run the Cisco VPN Client on a Mac you get "Error 51: Unable to cisco vpn communicate with the VPN subsystem". I ran into this issue while trying to get the Mac version of Cisco VPN Client to run on the only Mac user's system I support. After a little bit of searching I found out that the user's system is 64-bit and the Cisco VPN Client only comes in the 32-bit cisco vpn client flavor. The easiest way to get Mac OS X into 32-bit mode is to restart the computer and hold the 3 and 2 keys while it boots. Likewise, if your Mac normally boots in 32-bit mode you can hold down the 6 and 4 keys to get it to boot into 64-bit mode. You can check to see what architecture you are running by running this command in the terminal: [bash]systemsetup -getkernelbootarchitecturesetting[/bash] To set your machine to always boot into 32 bit mode enter this command and reboot: [bash]sudo systemsetup -setkernelbootarchitecture i386[/bash] To set your machine to always boot into 64 bit mode enter this command and reboot: [bash]sudo systemsetup -setkernelbootarchitecture x86_64[/bash] Cisco Cisco / OS X /
Categories Adobe Amazon EC2 AMD Android Cisco Exchange Online Firefox Graphics Cards Linux Malware MySQL Nginx Office 365 PowerShell Python Security Tips & Tricks Ubuntu Uncategorized Video Games VirtualBox Virtualization Windows Windows 7 Windows 8 WordPress ©2016 WarrenHeld.com - Powered by WordPress & Alpha FortePrevious Next → A workaround for Cisco VPN Client (Mac OS X) "Error 51" Posted on 2/11/2006 by Marc The Cisco VPN client 4.7.00 (0510) mostly works for me on OS X 10.4.4, but I get "Error 51" sporadically and I used to have to reboot to stop it, but now I took a tip that I found on VersionTracker and did a slight tweak to the command so that the cvpnd process daemonizes silently to the background and you don't have to remember to keep restarting it: launchd -d /bin/sh -c \ "while [ 1 ]; do /private/opt/cisco-vpnclient/bin/cvpnd; done" Although hopefully Cisco will solve the problem so that we don't have to resort to hacky solutions like this. Technorati tags: Cisco, VPN This entry was posted in Mac by Marc. Bookmark the permalink. 2 thoughts on “A workaround for Cisco VPN Client (Mac OS X) "Error 51"” Marc on 2/17/2006 at 10:24 am said: This tip was just posted on macosxhints: http://www.macosxhints.com/article.php?story=2006021411494452 B Campbell on 9/3/2010 at 8:07 am said: This is what I did to fix this problem: http://forum.maas360.com/go/mobileitexpertise/fix-for-cisco-vpn-error-51-unable-to-communicate-with-the-vpn-subsystem/ Leave a Reply Cancel reply Your email address will not be published.Comment Name Email Website Recent CommentsMike M on RésuméRCNSkip on Carbonite woesShawn on Python txLoadBalancerShawn on Python txLoadBalanceretenil on Emacs: TRAMP + bookmarks = awesome Proudly powered by WordPress