Once I changed it back to book with the 32 bit kernel it was not a problem. Apparently Cisco does not currently support the 64 kernel with their VPN. Sometimes this is simply not working A lot less technical but it has worked for me Lost your password? Powered by the Parse. More Mac Sites: Macworld MacUser iPhone Central. While this works well most of the time, I occasionally receive this error message when I launch the app: Error Unable to communicate with the VPN subsystem.
Cisco VPN Client for Mac - Download
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. When this occurs, I definitely have an active network interface that has an IP address, so it's quite clearly not an issue with my machine's settings. What makes it extra frustrating is that it's not consistent -- the app will work for days at a time through sleep and wake cycles, then spontaneously decide it's time for error 51 to appear.
I used to think rebooting was the only way to solve this problem -- I hadn't had much luck with the solutions posted in this older hint. A while back, after getting "51'd" again, I went in search of a better solution -- and I found one. In Terminal, use this relatively simple command to stop and restart the kernel extension that the Cisco VPN Client uses: So thanks to Anders.
How to Fix Cisco VPN Client Error 51 – Unable to Communicate with the VPN Subsystem
I would hope a future Cisco VPN Client update would solve the issue entirely, but that fix has been published for two years already, so I'm not holding my breath. The following comments are owned by whoever posted them. This site is not responsible for what they say. A cleaner way of doing it is like this: JaxMyers on Sep 02, '08 Could not get back on. Error 5 1: You can r ead instructions how to set it up here in Snow Leopard and it is probably very similar in Lion: VPN Client 4.
The new Mac OS 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.
Do you recommend it? With built-in ad blocker, battery saver, Messenger and extensions. Almost ready. To start the journey with Opera. Run the downloaded file and perform installation. If you can't access your office or need to connect to your office Jakatta Jakatta. If I go home the client no longer connects. Do you have the proper ports open on the firewall of your router, and is the OS X firewall enabled or disabled? Message was edited by: I have isolated this now to an issue with my D-Link Trying a friends WiFi had no issues.
It does seem odd that windows had no issues, but Mac did.
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As an aside I noticed in Wireshark that the source port is always for my Mac but varies for the Windows machine but usually in the region. MacStefano MacStefano. Well, I was lucky to get the connection for a few seconds then the system disconnected. I have never been able to re-connect since then, no matter what I did, e.
Delete and re-set up the VPN connection. Delete the network-related plist files, reboot and do what in 1. Enable normally disabled and disable Internet Sharing. Check the flag "Send all traffic over VPN connection". All this to no avail. The verbose logging is listed below after one last attempt a few minutes back.
Can anyone please help? Do you at Apple have any knowledge about it?
Any solution? Surprisingly Windows is working much better, this time Thanks very much. Stefano Fri Mar 4 PPTP connecting to server ' XXX' Fri Mar 4 PPTP connection established.