Cisco Vpn Error 51 Parallels
Contents |
in Mac OS X instead of the CiscoVPN software. Here's a guide that tells you how to convert from CiscoVPN cisco vpn error 51 windows 7 to the native OS X client. If you are running Cisco's cisco vpn error 51 mac VPNClient on Mac OSX, you might be familiar with (or tormented by) "Error 51: Unable to communicate cisco vpn client error 51 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) cisco vpn client error 51 windows 8 sudo /System/Library/StartupItems/CiscoVPN/CiscoVPN restart (for newer versions) sudo kextload /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 or Dial-up scenerios. Sometimes putting a system to sleep,
Cisco Vpn Client Error 51 Unable To Communicate With The Vpn Subsystem
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 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 3
Twitter Google + LinkedIn Newsletter Instagram YouTube DirectoryNetwork InfrastructureWAN, Routing and Switching LAN, Switching and Routing Network Management Remote Access Optical Networking Getting Started with LANs IPv6 Integration and Transition EEM Scripting
Cisco Vpn Client Error 56
Other Subjects SecurityVPN Security Management Firewalling Intrusion Prevention Systems/IDS AAA, Identity and cisco vpn client firewall NAC Physical Security MARS Email Security Web Security Other Subjects Service ProvidersMetro MPLS Voice Over IP XR OS and Platforms Video Other Subjects Collaboration, Voice and VideoIP Telephony Video Over IP Jabber Clients Unified Communications Applications TelePresence Digital Media System Contact Center Conferencing UC Migrations Other Subjects http://www.anders.com/cms/192/CiscoVPN/Error.51:.Unable.to.communicate.with.the.VPN.subsystem Wireless - MobilitySecurity and Network Management Wireless IP Voice and Video Getting Started with Wireless WLCCA Other Subjects ServicesCisco ServiceGrid Connected Analytics Smart Call Home Smart Net Total Care Operations Exchange Mobile ApplicationsCisco Proximity Cisco Technical Support Online Tools and ResourcesCisco Bug Discussions Technical Documentation Ideas Cisco CLI Analyzer Support Community Help Data CenterApplication Centric Infrastructure Application Networking Intelligent https://supportforums.cisco.com/document/18796/cisco-ipsec-vpn-client-mac-os-x-generates-error-error-51-unable-communicate-vpn Automation Server Networking Storage Networking Unified Computing Wide Area Application Services (WAAS) Other Subjects Small BusinessNetwork Storage Routers Security Surveillance Switches Voice and Conferencing Wireless Solutions and ArchitecturesBorderless Networks Collaboration Cisco User GroupsSeattle Cisco User Group (SEACUG) Silicon Valley Cisco User Group (SVCUG) Southern California Cisco User Group (SCCUG) Cisco Certifications Cisco.com Idea Center Cisco Cafe Expert CornerTop Contributors Leaderboards Cisco Live! Events Events Community CornerAwards & Recognition Behind the Scenes Feedback Forum Cisco Certifications Cisco Press Café Cisco On Demand Support & Downloads Community Resources Security Alerts Security Alerts News News Video Cisco Support YouTube Cisco YouTube Blogs Technical Documentation Cisco Products Products Services Services Solutions Solutions Global Support Numbers Cisco Support Community Directory Network Infrastructure WAN, Routing and Switching LAN, Switching and Routing Network Management Remote Access Optical Networking Getting Started with LANs IPv6 Integration and Transition EEM Scripting Other Subjects Security VPN Security Management Firewalling Intrusion Prevention Systems/IDS AAA, Identity and NAC Physical Security MARS Email Security Web Security Other Subjects Service Providers Metro MPLS Voice Over IP XR OS and Platforms Vi
Subscribe Resources Macs MacBooks Mac Desktops iPhones Blogs iPads Accessories Apps Audio Business Cameras Components Development software Displays E-readers Home Theater iOS iPhone Accessories iPad Accessories iPods OS X Printers Networking Productivity Software Smartwatches Storage Styluses Mac Desktops MacBooks Displays Networking Storage Mac OS X http://www.macworld.com/article/1136208/ciscovpn.html Hints Boost your productivity with our Mac OS X tips and tricks Home Networking Fix an error 51 with the Cisco VPN Client Comments By Rob Griffiths, Macworld Oct 17, 2008 12:57 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 cisco vpn 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 cisco vpn client 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 decided there must be a better solution, so I went digging to see if anyone else had already found one—and they had. As detailed on the linked site, the solution is a relatively simple command that you execute in Terminal (found in Applications -> Utilities). After discussing the Terminal command with a friend, he came up with an even simpler version that works just as well: sudo SystemStarter restart CiscoVPN You’ll need to be an administrative user to run this command, and provide your admin password when asked. You won’t see any output from the comm