Cisco Vpn Mac Error 51 10.6.8
in Mac OS X instead of the CiscoVPN software. Here's a guide that tells you how to convert from CiscoVPN to the native OS X client. 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 one of the following: (for older versions) 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, 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 30, 2007 6:49 PM Didn't work but rebooted my computer and the problem went away. Steve from Minneapolis #4 | Friday, May 4, 2007 5:30 PM Nice - works to correct the same issue when running Windows on a Mac (restart the Cisco VPN Service). Jason McCarty from Canada #5 | Monday, May 7, 2007 11:08 PM This did not work for me. I've gotten this error ever since I installed the VPN from cisco. I have the 4.9 version as well. What else might I need to do? Anders from RTP #6 | Tuesday, May 8, 2007 9:50 AM Yep, a friend of mine pointed that out and I have since confirmed it. Apple's new security update kills CiscoVPN when using dialup adapters. I don't ye
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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 http://www.macworld.com/article/1136208/ciscovpn.html Storage Mac OS X Hints Boost your productivity with our Mac OS X tips http://geekyninja.com/archives/how-to-connect-to-a-cisco-vpn-using-mac-os-x-10-6-snow-leopard/ 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 cisco 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 connection dialog: Error 51: cisco vpn mac 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 version that works just as well: sudo SystemStar
in the enterprise market and a lot of companies use them to provide their employees access to the company's networks and resources when the employees are not onsite. Most of these companies use the default Cisco client which Cisco supplies with a couple of modifications to suit their particular needs. More specifically, the configuration of this client involves creating a .pcf file which the client uses to read the settings for the specific network. The .pcf file is a plain text only file which a couple of config options, the important of which are the VPN server address, the encrypted group password and the group name. Mac OS X, since the last few version came with the ability to connect to L2TP and IPSec based VPNs out of the box but lacked the ability to connect to Cisco's implementation. That has now changed with the release of Mac OS X 10.6 aka. Snow Leopard. OS X now ships with the ability to connect to Cisco based VPNs out of the box. The only problem is that the configuration of the built in client requires a little bit of "homework" and in this post today I'll be taking you through just that. First of all you need to get hold of the .pcf file for your company's network. If you'd been connecting to the VPN using Cisco's client all this time, you'll have the .pcf somewhere on your computer - Search for it and save it somewhere convenient. Or else ask your network admin to provide you with a copy of the file. Either way you need to open this file with a text editor (TextEdit on OS X) and make note of a couple of config parameters. The first config option that we're interested in is the Host=xxx.xxx.xxx.xxx option where the xxx.xxx.xxx.xxx is an IP address. The second option that you'd need is the GroupName=xxx option and the third option that we want is the enc_GroupPwd=xxx where xxx will be a long string of seemingly random characters. The seemingly random characters is the encrypted group password that is needed to connect to your compan