Cisco Vpn Client Error 51 Windows 8
Contents |
DriverDoc WinSweeper SupersonicPC FileViewPro About Support Contact Errors Troubleshooting › Runtime Errors › Cisco Systems, Inc. › Cisco VPN Client › Error 51 How To Fix Cisco VPN Client Error 51 Error Number: Error 51 Error windows 7 cisco vpn client error 51 Name:Cisco Vpn Client Error 51 Error Description: Error 51: Cisco VPN Client has
Cisco Vpn Error 51 Unable To Communicate With The Vpn Subsystem Windows 7
encountered a problem and needs to close. We are sorry for the inconvenience. Developer:Cisco Systems, Inc. Software:Cisco VPN Client cisco vpn client for windows 8 64 bit free download Applies to:Windows XP, Vista, 7, 8 Download NowWinThruster 2015 - Scan your PC for computer errors. Compatible with Windows 10, 8, 7, Vista, XP and 2000 Symptoms of Error 51 "Error
Cisco Vpn Client Windows 8 Regedit
51" appears and crashes the active program window. Your PC frequently crashes with Error 51 when running the same program. “Cisco Vpn Client Error 51” is displayed. Windows runs sluggishly and responds slowly to mouse or keyboard input. Your computer periodically “freezes” for a few seconds at a time. These 51 error messages can appear during program installation, while a Cisco Systems, Inc.-related software cisco vpn client windows 8 blue screen program (eg. Cisco VPN Client) is running, during Windows startup or shutdown, or even during the installation of the Windows operating system. Keeping track of when and where your 51 error occurs is a critical piece of information in troubleshooting the problem. Causes of Error 51 Corrupt download or incomplete installation of Cisco VPN Client software. Corruption in Windows registry from a recent Cisco VPN Client-related software change (install or uninstall). Virus or malware infection that has corrupted Windows system files or Cisco VPN Client-related program files. Another program maliciously or mistakenly deleted Cisco VPN Client-related files. Runtime Errors such as “Error 51” can be caused by a variety of factors, so it is important that you troubleshoot each of the possible causes to prevent it from recurring. Runtime Errors Knowledgebase Article ID: 122649 Article Author: Jay Geater Last Updated: 18-07-2016 Popularity: star rating here Download NowError Fix Learn More Tweet Recommendation: Scan your PC for computer errors. How To Fix Cisco VPN Client Error 51 Below is a list of troubleshooting steps to resolve your Error 51 problems. These troubleshooting steps get progressively more difficult and
to work after she got an "Error 51" asking her to ensure that she at least one network adapter enabled (which was the case). The client software
Cisco Vpn Client Windows 8 Connected But No Access
wouldn't even startup to let us configure anything. After a couple of calls
Cisco Vpn Client Windows 8 Failed To Enable Virtual Adapter 442
to tech-support, finding out that the error isn't explained in the manual and a re-installations we found the following to cisco vpn client windows 8 registry fix work: disable the Firewall and Virus-software (McAfee in that case; make sure your machine is still behind another firewall, e.g. your routers' firewall), go to the Control Panel > Administrative Tools > Services. http://www.solvusoft.com/en/errors/runtime-errors/cisco-systems-inc/cisco-vpn-client/51-cisco-vpn-client-error-51/ Then stop and restart the "Cisco Systems, Inc. VPN Service". The startup setting should be set to automatic BTW. I still don't quite understand why this works (Shouldn't the client communicate with the service using named pipes? Shouldn't the firewall be irrelevant for the startup of the client?), but hey… Please leave a comment if that worked for you; or whatever workaround you found. Thanks. This http://blog.markus-breitenbach.com/2006/11/22/making-ciscos-vpn-client-work-error-51/ entry was posted on Wednesday, November 22nd, 2006 at 1:34 pm (November 22, 2006) and is filed under Fixing Stuff, Security. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed. 2 Responses to "Making the Cisco VPN Client work (Error 51)" raytube says: March 14, 2007 11:51 am at 11:51 am (March 14, 2007) That sounds excactly like the problem I have on a laptop. It had way too many protocols installed, tunnelling hooks in it, it wouldnt get on the net. I removed bunches of those, but it still has windows firewall and mcafee AV/sysprotect running. I'm going to try and run zonealarm on it. Then I'll try putting in a router beteen the cable modem and laptop. Bumika says: October 1, 2007 12:01 pm at 12:01 pm (October 1, 2007) I had the same problem using another security software. It blocked cvpnd.exe and logged a boep (buffer overflow exploit prevention) event. McAfee AV has a similar feature so that I think its boep blocked your instance of Cisco VPN client. Markus Breitenbach is proudly powered by WordPress Entries (RSS) and Comments (RSS).
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. If you are running Cisco's VPNClient on Mac OSX, you might be familiar with (or tormented by) "Error http://www.anders.com/cms/192/CiscoVPN/Error.51:.Unable.to.communicate.with.the.VPN.subsystem 51: Unable to communicate with the VPN subsystem". The simple fix is to 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 http://www.pcworld.com/article/152441/article.html /System/Library/Extensions/CiscoVPN.kext and give your password 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 cisco vpn 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 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 cisco vpn client 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 the Cisco VPN Service). Jason McCarty from Canada #5 | Monday, May 7, 2007 11:08 PM This did not work for me. I've gotten this error ever since I installed the VPN from cisco. I have the 4.9 version as well. What else might I need to do? Anders from RTP #6 | Tuesday, May 8, 2007 9:50 AM Yep, a friend of mine pointed that out and I have since confirmed it. Apple's new security update kills CiscoVPN when using dialup adapters. I don't yet have a work-around though I hear it is an issue with Apple, not Cisco. (I have nothing to back that up)
Gadgets Subscribe Resources Hardware Phones Printers Ultrabooks Blogs Viruses Cameras Components Computer Accessories Consumer Advice Displays E-readers Flash Drives Graphics Cards Hard Drives Home Theater Input Devices Keyboards Laptop Accessories Mobile Networking Operating Systems Optical Drives Processors Servers Smartwatches Streaming Services Storage Tablets Windows Input Devices Displays Printers Storage Networking Cameras Home Networking Fix an Error 51 With the Cisco VPN Client Comments By Rob Griffiths, Macworld Oct 17, 2008 2:50 PM One of the most-used programs on my Mac is the Cisco VPN Client, which is what I use to connect to Macworld's VPN when posting articles such as this one. (OS X's built-in VPN client also works, but it also logs me out of and then back into iChat every time I connect or disconnect from the VPN. The Cisco VPN Client doesn't have this annoying problem, so I use it instead.)While the Cisco VPN Client works well most of the time, sometimes when I try to launch the application, I'm greeted with this error message in place of the usual connection dialog: 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 error is clearly incorrect, because my machine's networking capabilities are otherwise fine--I can browse the net, send and receive e-mail, and connect to other machines in the house. I don't get the error message all the time, and I don't really know what causes it. It does seem to happen more often if I've slept and woke the machine, or moved it from one defined location to another, but even then, it's not predictable. All I know for sure is that it's annoying, because (until recently) the only fix I was aware of was to reboot the machine.One day, after probably the second or third time I'd restarted my machine, I decid