Cisco Vpn Client Error 51 Unable To Communicate
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Cisco Vpn Client Error 51 Unable To Communicate With The Vpn Subsystem
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Error 51 Unable To Communicate With The Vpn Subsystem Lion
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 https://supportforums.cisco.com/document/18796/cisco-ipsec-vpn-client-mac-os-x-generates-error-error-51-unable-communicate-vpn 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 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 http://www.macworld.com/article/1136208/ciscovpn.html 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 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 so
VPN Service has not been started. Please start this service and try again. Secure VPN Connection terminated locally by the client. Reason 403: Unable to http://helpdesk.ugent.be/vpn/en/faq_cisco.php?id=51 contact the security gateway. Secure VPN Connection terminated locally by the Client. 412: The remote peer is no longer responding. Secure VPN connection terminated locally by the client. Reason 413: User authentication failed Reason 421: Failed to establish a connection to your ISP. Cisco VPN Client displays the message "Reason 422": Lost contact with the security gateway. Check your network connection". cisco vpn The connection to the RoamNet VPN Gateway is no longer available. Secure VPN Connection terminated locally by the Client. Reason 429: Unable to resolve server address. Secure VPN Connection terminated locally by the Client. Reason 442: Failed to enable Virtual Adapter. Error 1609: An error occurred while applying security settings. Authenticated ... Error 1722: There is a problem with this Windows cisco vpn client Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor. (error when installing Cisco) Error 28000 (error when installing Cisco because there is still (a part of) an old installation present on the system) When installing Cisco, a 'DNE error' occurs and you are asked to restart Windows XP When starting the VPN connection, the computer shuts down (or generates a blue screen). Error 427: unknown error occurred at peer. Mac Error 51: Unable to communicate with the VPN subsystem Solution: If you are running Cisco's VPNClient on Mac OSX, you might be familiar with (or tormented by) "Error 51: Unable to communicate with the VPN subsystem". The simple fix is to quit VPNClient, open a Terminal window, (Applications -> Utilities -> Terminal) and type the following: sudo /System/Library/StartupItems/CiscoVPN/CiscoVPN restart and give your password when asked to. 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 W