Tried some of the solutions suggested here, but it didn't work out. Rene from San Antonio #187 | Saturday, June 5, 2010 11:29 PM this helped me... Disable all Parallels network adapters in the network preferences. yesterday downloaded Lion (10.7) and when I tried to open Cisco VPN Client gave me the bloody error 51. check my blog
Do you know how can I solve this Arnim van Lieshout from Maastricht, The Netherlands #133 | Monday, January 12, 2009 3:02 PM Thanks!!! This essentially means the transform sets used probably do not support the encryption used by the Mac built-in client. Thanks. I had that problem that tried most of the advises posted here.
Berthor from Chicago #85 | Wednesday, June 18, 2008 9:53 AM wow, I'm glad I googled and found your site. I tried to use Cisco VPN Client, but received Error 51. Just wow...what are the odds? thanks!
My client's server tech set me up with Cisco VPN Client v4.9.01 (8080). Baris Kurt from Istanbul Turkey #131 | Friday, January 2, 2009 9:46 AM Thanks very much. A program run as part of the setup did not finish as expected. Cisco Vpn Error 51 Vista There is, apparently, a more permanent fix, but I'm a bit nervous to try it.
Authenticated ... Therefore, no fixes will be put in for this client.General QuestionsQ. nikolaus heger from #98 | Saturday, August 9, 2008 8:25 AM I have to restart Cisco VPN all the time - so I already knew your tip. http://www.firewall.cx/cisco-technical-knowledgebase/cisco-services-tech/1038-cisco-vpn-client-error-51.html johnny0 from #46 | Saturday, January 19, 2008 10:58 AM I'd also like to see the icon change if I'm connected, but this is probably past the capabilities of the Cisco
thanks a lot! Cisco Vpn Client Reyn from Los Angeles/CA/USA #186 | Friday, June 4, 2010 7:54 AM I also used Richard of Santa Barbara's sudo kextload command and it worked when nothing had worked before. I don't have any firewalls on and am not part of any network. In the console I get "Could not attach to driver.
Look for "64-bit Kernel and Extensions: Yes (or No)" under the System Software Overview heading.How to Set the Boot Architecturehttp://support.apple.com/kb/ht3773Issue 3: Mac OS X 10.7 (Lion) or laterIf one tries to http://www.cisco.com/c/en/us/support/docs/security/anyconnect-secure-mobility-client/116080-productqanda-vpnclients-00.html You're the man!!! Cisco Vpn Error 51 Windows Xp Apple's new security update kills CiscoVPN when using dialup adapters. Cisco Vpn Error 51 Snow Leopard It finally occurred to me maybe I should try repairing file permissions.