Cisco Vpn Error 51 On Mac
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Mac Cisco Vpn Error 51 Snow Leopard
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 cisco vpn error 51 mac lion 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 of and then back into iChat every time cisco vpn client mac error 51 unable communicate vpn subsystem 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 least one network interface that is currently active and has an
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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 command; the Terminal prompt will return when it’s done. After using the above command, the Cisco VPN Client should run without any
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X "Error 51: Unable to communicate with the VPN subsystem" When you try to run the Cisco VPN Client on a Mac you get "Error 51: Unable to http://www.macworld.com/article/1136208/ciscovpn.html communicate with the VPN subsystem". I ran into this issue while trying to get the Mac version of Cisco VPN Client to run on the only Mac user's system I support. After a little bit of searching I found out that the user's system is 64-bit and the Cisco VPN Client only comes in the 32-bit https://www.warrenheld.com/cisco-vpn-client-for-mac-error-51/ flavor. The easiest way to get Mac OS X into 32-bit mode is to restart the computer and hold the 3 and 2 keys while it boots. Likewise, if your Mac normally boots in 32-bit mode you can hold down the 6 and 4 keys to get it to boot into 64-bit mode. You can check to see what architecture you are running by running this command in the terminal: [bash]systemsetup -getkernelbootarchitecturesetting[/bash] To set your machine to always boot into 32 bit mode enter this command and reboot: [bash]sudo systemsetup -setkernelbootarchitecture i386[/bash] To set your machine to always boot into 64 bit mode enter this command and reboot: [bash]sudo systemsetup -setkernelbootarchitecture x86_64[/bash] Cisco Cisco / OS X /
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Previous Next → A workaround for Cisco VPN Client (Mac OS X) "Error 51" Posted on 2/11/2006 by Marc The Cisco VPN client 4.7.00 (0510) mostly works for me on OS X 10.4.4, but I get "Error 51" sporadically and I used to have to reboot to stop it, but now I took a tip that I found on VersionTracker and did a slight tweak to the command so that the cvpnd process daemonizes silently to the background and you don't have to remember to keep restarting it: launchd -d /bin/sh -c \ "while [ 1 ]; do /private/opt/cisco-vpnclient/bin/cvpnd; done" Although hopefully Cisco will solve the problem so that we don't have to resort to hacky solutions like this. Technorati tags: Cisco, VPN This entry was posted in Mac by Marc. Bookmark the permalink. 2 thoughts on “A workaround for Cisco VPN Client (Mac OS X) "Error 51"” Marc on 2/17/2006 at 10:24 am said: This tip was just posted on macosxhints: http://www.macosxhints.com/article.php?story=2006021411494452 B Campbell on 9/3/2010 at 8:07 am said: This is what I did to fix this problem: http://forum.maas360.com/go/mobileitexpertise/fix-for-cisco-vpn-error-51-unable-to-communicate-with-the-vpn-subsystem/ Leave a Reply Cancel reply Your email address will not be published.Comment Name Email Website Recent CommentsMike M on RésuméRCNSkip on Carbonite woesShawn on Python txLoadBalancerShawn on Python txLoadBalanceretenil on Emacs: TRAMP + bookmarks = awesome Proudly powered by WordPress