Normally you would be right on track - more times than not, "VPN Subsystem" problems have to do with the vpn client software not properly communicating with the operating system. Don't know if you're dealing with a "windows thing" or an environmental issue - firewall, etc.

Uninstall CiscoVPN client, restart your computer, and then install Cisco VPN client again. See if this work around works. If it doesn’t, try this other method. According to a website, the proprietary CiscoVPN Mac OS X client is kind of buggy although it is verified that the native CiscoVPN works on Mac OS X 10.8 Mountain Lion. Fix the dreaded OSX Cisco Error 51Unable to communicate with the VPN subsystem - by using the built in OS X Client network system prefences I inherited Cisco AMP after a couple of our team members left. It had not been monitored for quite some time and the computers were on connector 6.0.5 and 6.0.9 as well as Symantec Cloud. So thanks to Anders.com for solving this frustrating issue with the Cisco VPN Client. 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. • Nov 06, 2014 · Cisco VPN Client ver 5.0.07 supports Windows Vista and Windows 7 in both the x86 (32-bit) and x64 (64-bit) editions. Cisco VPN Client does support Windows XP 32 bit only, but Windows XP 64 bit is not supported. Note: Windows Vista 32 bit support was available in all 5.x releases. Cisco VPN client version 5.0.07 added the 64 bit support. Q. 3 stars { review.getRatingValue }} "Works with Leopard and Tiger" "Works with Leopard and Tiger" alexhoward April 15, 2008 / Version: Cisco VPN Client 4.9.01 (0100) Dec 18, 2006 · While that's all well and good, we need Cisco IPSEC VPN access over this connection. While Cisco are to be applauded for providing a Mac client for their software, it does have an annoying bug (our version is 4.9.01).

And it turns out there is a firewall that blocks Cisco VPN program. Then I restarted my notebook and I try to rerun the Cisco VPN And … tadaaaa .. open successfully. Thank you very much. [Note: original comment (below) was written in Indonesian] Artikel ini sangat membantu. Saya uninstall AntiVirus asing di Notebook saya

Fix the dreaded OSX Cisco Error 51Unable to communicate with the VPN subsystem - by using the built in OS X Client network system prefences

The cisco client install should disable the ms ipsec services. The 2 digit errors the cisco client throw to the user are damn near worthless. You want to crank up all the logging within the client

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 client also works And it turns out there is a firewall that blocks Cisco VPN program. Then I restarted my notebook and I try to rerun the Cisco VPN And … tadaaaa .. open successfully. Thank you very much. [Note: original comment (below) was written in Indonesian] Artikel ini sangat membantu. Saya uninstall AntiVirus asing di Notebook saya This article explains how to correct the Cisco VPN “Error 51” problem usually found on Apple Mac OS X. We provide full explanation of the problem and explain how Hi, yes, the cisco vpn client is not supported with the 64bit lion version anymore. I am using since the lion update now the Mac integrated VPN client (Network Preferences, +, VPN, Cisco IPSec, etc.) Uninstall CiscoVPN client, restart your computer, and then install Cisco VPN client again. See if this work around works. If it doesn’t, try this other method. According to a website, the proprietary CiscoVPN Mac OS X client is kind of buggy although it is verified that the native CiscoVPN works on Mac OS X 10.8 Mountain Lion. Fix the dreaded OSX Cisco Error 51Unable to communicate with the VPN subsystem - by using the built in OS X Client network system prefences I inherited Cisco AMP after a couple of our team members left. It had not been monitored for quite some time and the computers were on connector 6.0.5 and 6.0.9 as well as Symantec Cloud.