I was so tired about Cisco VPN disconnecting. Great tip! any suggestions ? I fixed my issue with a combination of both of the most used methods above: verifying the permissions in the disk utility, and then reloading the driver. weblink
tried reinstalling and everything.. Still not working. In the console I get "Could not attach to driver. 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))... https://supportforums.cisco.com/discussion/10256526/vpn-client-error-51-windows-xp
Through googling, I realized I overlooked a stupid issue that I introduced. Yes I did see all the posts dealing with MAC OS X when googling the error message. Virus or malware infection that has corrupted Windows system files or Cisco VPN Client-related program files.
A black box will open with a blinking cursor. Also, it would seem that Cisco is unable to respect conventions of not putting startup items /System/Library/StartupItems. I'm trying to install the Cisco VPN, but keep getting Error 51. I never was able to identify why the system started randomly having this problem and I experienced several other software related issues as I continued to troubleshoot the problem.
at least is worth the try looking into this intenet sharring..http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Virtual%20Private%20Networks&topic=General&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.1dde0392RgdsJorge See More 1 2 3 4 5 Overall Rating: 4 (1 ratings) Log in or register to post comments acomiskey Vpn Client Error 51 Unable To Communicate With The Vpn Subsystem Any software firewalls configured on the box that might be doing something weird? This very simple, very typical error message, but it is so hard to find a quick solution. George Coller from Austin, TX #26 | Friday, November 16, 2007 1:39 PM Cool, glad I found this!
Fixed. thank you so much. If anyone's got the latest copy of the 4.9+ .dmg they can share please let me know! Likely have to wait for an update from Cisco for the client to work -- means I need to update documentation for our users!
Tim Chan from #102 | Sunday, August 31, 2008 10:32 PM thank you. https://www.experts-exchange.com/questions/22664315/Cisco-VPN-Client-cannot-connect-Error-51.html Join the community of 500,000 technology professionals and ask your questions. Error 51 Cisco Vpn Windows 10 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 Or a better idea would be to not reinvent the wheel and use the existing IPSec VPN support in OSX!
I'm sure that a verify permissions, followed by a reload would do the same thing. http://gmailpush.com/error-51/vpn-cisco-error-51.html You can follow any responses to this entry through the RSS 2.0 feed. I am using it now via a wireless connection to write this. Dude, you are THE MAN!!
Tried your suggestion of restarting the Cisco VPN from terminal and it worked. I had a VPN connection problem and it worked really well, Obrigado Frank Jorge from NY, NY, USA #195 | Monday, August 30, 2010 8:03 AM After a couple of days While upgrading, I was tremendously confused about how the VPN and AnyConnect licensing works. check over here While holding CTRL-Shift on your keyboard, hit ENTER.
Lisa from Boston, MA #184 | Saturday, April 24, 2010 6:18 AM Outstanding. Anyways, any help at is greatly appreciated. Dave Eds from Nashville TN USA #162 | Tuesday, October 20, 2009 9:08 PM THANK YOU Dan H!!
Cisco seems to have problems when network adapters disappear and reappear, something that happens commonly in Wireless or Dial-up scenerios. Then stop and restart the "Cisco Systems, Inc. The client starts fine and I can click connect but it thinks for a few seconds and then goes back to disconnected (I never get the password challenge popup) Does anyone but looking into XP internet sharing you would need at least two NICS to turn on XP internet sharing..
Kevin McMurtrie from Silicon Valley #32 | Friday, November 23, 2007 9:28 PM VPN Client worked in 10.5.1 after I disabled all vlans. mpeg2tom from LA #57 | Saturday, February 23, 2008 2:50 PM Yep, it worked for Cisco 4.9.01 on OS X 10.5.2 MacBook Intel Michael from Horsham PA #58 | Tuesday, February a second reinstall and restart has got it working again. this content t from The World #68 | Wednesday, April 9, 2008 9:08 AM Another thing to check - make sure you do not have multiple network interfaces active.
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