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Thanks. The VPN driver only has i386 and PPC extensions, not x86_64 extensions. this is very annoying, but I cannot switch to another programm as u can only connect to my university net by using CiscoVPN...even the specialists around here from the computer center Choose About This Mac from the Apple menu.   2.

Then execute: $ sudo ifconfig fw0 down You may have to execute the command twice. But nothing seems to work... I followed your instructions and it worked like a charm. I'm using OS 10.5.2.

Error 51 Unable To Communicate With The Vpn Subsystem Windows 7

You can pull down the 4.9.01 build from MacUpdate.com cheers Ben from CA #42 | Friday, December 21, 2007 3:23 PM Thank You! Also, it would seem that Cisco is unable to respect conventions of not putting startup items /System/Library/StartupItems. Disable all Parallels network adapters in the network preferences. i hated having to reboot just because of this stupid error.

Back to Cisco Services & Technlogies Section Articles To Read Next: Introducing The Cisco Technical Support Mobile App (App... Thanks - confounded my IT department JD from San Francisco #87 | Thursday, June 26, 2008 9:27 PM thank you mr. Grant from Melbourne, Australia #82 | Friday, June 13, 2008 7:36 AM Thank you. Error 51 Unable To Communicate With The Vpn Subsystem Windows 10 Worked great!

reinstalling doesnt work Anders from RTP #11 | Wednesday, June 20, 2007 4:52 PM Rutger: This is the first time I'm hearing about this error in Windows. Thanks man ! Stop Renting Your Cable Modem Just this once, pay attention to your Broadband bill. Thank you!

Carl Spackler from Bushwood #97 | Monday, August 4, 2008 11:17 PM Thanks, that did the trick and got the client running again. Error 51 Credit Card Good Luck Flo PS: But i didn't use the cisco vpn client... I'm sure that a verify permissions, followed by a reload would do the same thing. Are others seeing this as well?

Cisco Vpn Client Error 51 Windows 8

You might have a newer version partially installed over an older one. dig this yesterday downloaded Lion (10.7) and when I tried to open Cisco VPN Client gave me the bloody error 51. Error 51 Unable To Communicate With The Vpn Subsystem Windows 7 Even better! Error 51 Cisco Vpn Windows 10 yes , i am using Leopard..

Els from Valkenburg NL #191 | Tuesday, July 13, 2010 3:22 PM Anders, thanks for keeping this blog. Or a better idea would be to not reinvent the wheel and use the existing IPSec VPN support in OSX! Made a fixvpn alias for this, and it worked like a charm on Leopard 10.5.1 :-) Thanks so much! - Erik Balrob from A Kiwi in Utah #41 | Thursday, December Anders Brownworth Technology and Disruption RSS @Anders94 Podcast Projects LinkedIn About Cisco VPN - Fix for Error 51: Unable to communicate with the VPN subsystem Monday, November 13, 2006 7:25 PM Unable To Communicate With The Vpn Subsystem Windows 8

Gavin from Rockville, MD #115 | Wednesday, October 8, 2008 9:05 AM Hi Anders, Yes, I dragged the old version from Apps to the trash, emptied it, then installed from a Close any cisco vpn processes in control alt delete, Go to start, go to run, type in "services.msc", turn off "wireless zero configuration", restart "cisco systems, inc VPN service", turn "wireless AFAIK, IKE doesn't have a phase 5 so I'm hoping to see some other context. Danielle from Cary NC #142 | Thursday, March 12, 2009 4:57 PM Thanks for trying to help.

Thanks man. Error 51 Unable To Communicate With The Vpn Subsystem Windows 8 First repair your permissions (with utility), then install, who knows it may work like it did with me? sudo /System/Library/StartupItems/CiscoVPN/CiscoVPN restart produces: Stopping Cisco Systems VPN Driver kextunload: unload kext /System/Library/Extensions/CiscoVPN.kext failed Starting Cisco Systems VPN Driver extension /System/Library/Extensions/CiscoVPN.kext does not contain code for this architecture which seems ridiculous

Click here to search our knowledge base. © Bruin OnLine 7/22/2011: Cisco VPN Client compatibility with Mac OS 10.7/Lion The current version of the Cisco VPN Client does not appear to

Hope this helps some of the folks out there who weren't able to make this work using the solutions posted here. http://www.shimoapp.com/ (If you need cisco-vpn-profiles, you have to install cisco-vpn-client first, otherwise it won't run!) Jay from Around the world #147 | Wednesday, April 22, 2009 3:02 AM Just adding my It worked! Cisco Vpn Error 56 Anyone have any suggestions?

Do not Move Cisco Shortcuts Shortly after Cisco VPN install I moved the icon group away from the Start Menu - Programs folder.  Later I've noticed that Cisco VPN is trying Nicole from Ottawa Canada #211 | Tuesday, February 1, 2011 5:07 PM Thank you! Seems odd for them to not make it freely available. (actually, I'm not sure it was ever freely available) Its not like its going to work with a VPN from someone Thank you!

Anders from RTP #141 | Thursday, March 12, 2009 1:33 PM Danielle: I don't really have anything solid to suggest but make sure any kind of firewall or other networking package Anders from Cambridge, MA #178 | Tuesday, March 30, 2010 9:01 AM @Adam: Seems like you might be pointed to the wrong DNS server. Zappa from Germany #196 | Sunday, September 19, 2010 12:13 AM for me the combination of this tow commands work realy good! Thanks a lot, worked really well!

Adrian Smith from Sydney, NSW, Australia #14 | Wednesday, July 18, 2007 8:22 AM Error 51 has just cropped up for me as well (4.9.01 (0030))... Firewall.cx - Cisco Networking, VPN - IPSec, Security, Cisco Switching, Cisco Routers, Cisco VoIP- CallManager Express & UC500, Windows Server, Virtualization, Hyper-V, Web Security, Linux Administration JavaScript is currently disabled.Please enable Carina from San Francisco #96 | Friday, August 1, 2008 11:05 AM Thanks for the tip! It had a Resources and Profiles folder.

Here's the link to the installation of the Cisco VPN client that I'm using (4.9.0180). Steve Larimore from Lexington #27 | Friday, November 16, 2007 3:58 PM Go to run and type services.msc .. For VMWare not sure this is still an issue with VMWare 2.0 but the older version I just shut down like this: sudo "/Library/Application Support/VMware Fusion/boot.sh" --stop When you need VMWare, None of them worked at all.

Pascal Drew from France #22 | Wednesday, November 7, 2007 5:03 AM I have also just upgraded to Leopard 10.5 and it has started happening to me too, tried earlier ideas Finally!! 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. Anders from Boston, MA #173 | Saturday, February 6, 2010 8:03 AM Rabbid: In my opinion, that's not a good rationale for writing bad software.

I selected those two VPN lines and clicked on Approve button.  You might need to add them to your application list. Scott from #212 | Wednesday, February 2, 2011 7:59 AM Awesome!