Cisco Vpn Client Mac Error 51 Unable To Communicate
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X tips and tricks Home Networking Fix an error 51 with the Cisco VPN Client Comments By Rob Griffiths, Macworld Oct 17, cisco vpn client osx leopard 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
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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 to launch the application, I’m greeted with this error message in place of the usual cisco vpn client ubuntu 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 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 versio
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enter a title. You can not post a blank message. Please type your message and try again. buzz8976 Level 1 (0 points) Q: Cisco VPN Client Error 51 message since https://discussions.apple.com/thread/3195725?start=0&tstart=0 upgrade to Lion Since upgrading to OS X Lion I can no longer use Cisco VPN Client, I keep getting the following error message:Error 51: Unable to communicate with the VPN https://www.bol.ucla.edu/alert/20110722.html 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.Please help I need remote desk cisco vpn top for work. MacBook Pro, Mac OS X (10.6.4) Posted on Jul 21, 2011 12:12 PM I have this question too Close Q: Cisco VPN Client Error 51 message since upgrade to Lion All replies Helpful answers by Asatoran, Asatoran Jul 21, 2011 2:00 PM in response to buzz8976 Level 4 (2,525 points) Jul 21, 2011 2:00 PM in response to buzz8976 Are cisco vpn client you using the software client from Cisco, or OSX's built-in VPN? In my experience, almost every operating system upgrade has needed a update to the VPN client software. Have you checked if there's a newer Cisco client for your office?That said, have you tried uninstalling and reinstalling the Cisco software? Also, OSX's built-in VPN client works for many Cisco implementations, so works for a lot of people. If possible, I recommend uninstalling Cisco's software an see if you can configure OSX's VPN. I'm currently using OSX's VPN to a Cisco ASA 5510 with SecureID authentication. With OSX 10.6.8 and 10.7. (And on my iPad as well. ) Helpful (0) Reply options Link to this post by buzz8976, buzz8976 Jul 21, 2011 2:12 PM in response to Asatoran Level 1 (0 points) Jul 21, 2011 2:12 PM in response to Asatoran Hi AsatoranI did as you suggested I uninstalled it downloaded this version: VPN Client 4.9 for Mac from this site: http://www.helpdesk.ugent.be/vpn/en/akkoord.phpAnd it seems to be working perfectly now.Thanks Helpful (0) Reply options Link to this post by wickdillon, wickdillon Jul 30, 2011 1:43 PM in
on 6/30 News archive rss BOL Webmail Have a question? Click here to search our knowledge base. © Bruin OnLine 7/22/2011: Cisco VPN Client compatibility with Mac OS 10.7/Lion The current version of the Cisco VPN Client does not appear to run properly if Mac OS is running the 64-bit kernel. Mac OS 10.7/Lion runs the 64-bit kernel by default. Users will see the error "Error 51: Unable to communicate with the VPN subsystem" when starting the VPN. Until Cisco releases a compatible client, there are a few workarounds available: Set Mac OS X to boot using the 32-bit kernel according to the instructions in Apple's support article Configure the Mac OS X built-in VPN client to connect to the UCLA VPN using any one of the following protocols: PPTP Cisco IPSEC Please note that this issue is not specific to Mac OS 10.7/Lion. Apple has a list of Macs that use the 64-bit kernel by default as well as instructions to find out if you're using 64-bit mode. If you have any questions, please contact the BOL Help Desk at (310)267-4357 or at consult@ucla.edu. UCLA Home | UCLA Directory | URSA | MyUCLA | Library | BruinCard | Sitemap Last Updated Fri Jul 22 12:46:58 PDT 2011 'tk' consult@ucla.edu