I did however confirm that my internet sharing was disabled which didn't help (I'd already tried repairing permissions and restarting) but then I stopped Personal File Sharing, Personal Web Sharing and I see this in the terminal: Encryption: 168-bit 3-DES Authentication: HMAC-MD5 IP Compression: None NAT passthrough is active on port UDP 4500 Local LAN Access is disabled In the client, and Please let me know, if anything new is found out...thanks a lot!!! Erik from Stockholm / Sweden #179 | Sunday, April 4, 2010 1:41 AM THX! Source
Try creating a native VPN connection: http://anders.com/guides/native-cisco-vpn-on-mac-os-x/ Julie from Somerville, Ma #221 | Saturday, April 9, 2011 5:50 PM I'm not able to type a password after I paste the codes both builds 90 and 80.. Patrick from Los Angeles, CA #28 | Thursday, November 22, 2007 6:00 AM I was having that error on Mac OS X 10.5.1 but we got the VPN Client version 4.9.01 If possible, I recommend uninstalling Cisco's software an see if you can configure OSX's VPN. http://www.anders.com/cms/192/CiscoVPN/Error.51:.Unable.to.communicate.with.the.VPN.subsystem
Bert Woudwijk from Rotterdam, The Netherlands #132 | Tuesday, January 6, 2009 9:57 PM I have error 51 with Windows XP. Hmmm--maybe it's the AirPort... Here's the link to the installation of the Cisco VPN client that I'm using (4.9.0180). r from CT #166 | Tuesday, November 10, 2009 3:35 PM 3 years on, your post is still solving problems.
I'm so glad I found this solution so quickly! This very simple, very typical error message, but it is so hard to find a quick solution. Richard from Santa Barbara #169 | Friday, December 11, 2009 10:29 AM I'm running Snow Leopard now and the previous "restart" method doesn't work anymore; there's no such program as "/System/Library/StartupItems/CiscoVPN/CiscoVPN". Error 51 Unable To Communicate With The Vpn Subsystem Windows 10 Matt from wiltshire UK #167 | Thursday, November 12, 2009 8:26 AM Cheers Dan , Your a Top Man !!
Just keep typing and hit enter when done. Cisco Vpn Client Error 51 Windows 8 Bron: http://www.anders.com/cms/192/CiscoVPN/Error.51:.Unable.to.communicate.with Error 51 na upgrade naar Snow Leopard Indien error 51 zich voordoet na een upgrade volstaat het de Cisco client te verwijderen en opnieuw te installeren. Apple may provide or recommend responses as a possible solution based on the information provided; every potential issue may involve several factors not detailed in the conversations captured in an electronic https://supportforums.cisco.com/discussion/11195196/error-51-unable-communicate-vpn-subsystem Niraj D from irvine, ca usa #202 | Sunday, November 7, 2010 3:41 PM You ROCK!
Even if Cisco's VPN client were essentially a shell script which unloads then reloads the ktext and then starts the client, that would be better. Error 51 Credit Card It might make more sense for Cisco to have used the native IPSec implementation in Mac OSX. Had the same glitch after upgrading to Snow Leopard. Tried everything above to no avail - including a post from another forum recommending to turn off web sharing.
Daniel Gauthier from Missoula #91 | Tuesday, July 15, 2008 10:09 PM Cisco VPN Error 51: unable to communicate with VPN subsystem My Windows Fix... http://www.firewall.cx/cisco-technical-knowledgebase/cisco-services-tech/1038-cisco-vpn-client-error-51.html Thank you so much btn from San Jose / CA / US #76 | Thursday, May 29, 2008 12:55 AM This solution fixed the problem after I upgraded to 10.5.3. Error 51: Unable To Communicate With The Vpn Subsystem Windows 7 Anyone have any suggestions? Error 51 Cisco Vpn Windows 10 Using Snow Leopard and the sudo kextload command, I was able to restart the VPN client.
tried the suggestion by the MacWorld guys and it crashed the OS, had to push-and-hold. very useful. Op de Snow leopard kan u ook de ingebouwde vpn-client gebruiken. Steve Larimore from Lexington #27 | Friday, November 16, 2007 3:58 PM Go to run and type services.msc .. Unable To Communicate With The Vpn Subsystem Windows 8
You might have a newer version partially installed over an older one. 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 from Cambridge, MA #178 | Tuesday, March 30, 2010 9:01 AM @Adam: Seems like you might be pointed to the wrong DNS server. have a peek here Coolestguidesontheplanet.com | Neil Geecoolest guides on the planetCoolest Guides On The PlanetNeil GeeHomemacOSWebDevAll PostsContactCisco Error 51: Unable to communicate with the VPN subsystem, Mac OSX 10.7, 10.6March 5, 2010 7 CommentsCisco
If you need to connect to a client VPN from work, and you are using Windows PPTP (build-in VPN), you need to open TCP port 1723 on your local or corporate Error 51 Unable To Communicate With The Vpn Subsystem Windows 8 any suggestions ? Connections would be attempted and a password was requested but after submitting, the connection would never be established and eventually the Cisco VPN app would time out and go back to
Ritesh from fremont, ca #158 | Friday, October 2, 2009 9:32 AM Hi, I had the similar problem. This will stop and start the "VPN Subsystem", or in other words restart the CiscoVPN.kext extension. Karen F from Gaithersburg MD #215 | Saturday, February 19, 2011 2:14 PM I don't understand _why_ it works, but it works. Cisco Vpn Error 56 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.
Your other alternative is to set up a native connection. CJ from maryland #206 | Monday, December 6, 2010 9:02 PM I'm receiving the VPN error 51 but i am using a PC not a Mac. greg from wellington NZ #12 | Tuesday, June 26, 2007 1:49 AM i'm working in wellington unforturneatly this hasn't worked anymore ideas Anders from RTP #13 | Tuesday, June 26, 2007 Here is what I get: 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 I don't
Tried multiple solutions with no success. (mainly those first two options) … The Lord lead me to your page and I clicked on your link, I was just about to exit Then, once they are all unchecked, disable Internet Sharing and you are good to go.