CISCO VPN ERROR 51, NNNOOOOOOOOO

I am receiving the dreaded Error 51 when ever I install and try to launch the Cisco VPN Client.
This is on a brand new Mac Book Pro, so this software was never previously installed. Ive been trying to install the Cisco VPN Client version 280, but I've tried older versions too with the same Error 51 problem.
I've uninstalled, reinstalled, uninstalled via the Terminal window, restarted, tried multiple number of Terminal commands found online, nothing has worked. The odd thing, a co worker of mine with a similar set up was able to install the client just fine, so there's something up with my machine.
One other thing I've noticed, sometimes when I restart or uninstall the client via the Terminal, I get this error
/System/Library/Extensions/CiscoVPN.kext failed to load - (libkern/kext) requested architecture/executable not found; check the system/kernel logs for errors or try kextutil(8).
I checked my '/System/Library/' directory and I dont have this Extensions folder at all.
Can anyone help with this issue? For the love of God, this is day #3 with this issue and the whole IT department at my work is stumped.
Thanks

You must have the /System/Library/Extensions/ folder or your computer wouldn't be able to boot.
I have read about problems with the Cisco software. See the following:
Fix Cisco VPN in 10.6 [Simon Heimlicher] and HDC >> Cisco VPN for Mac OS X 10.6. If neither of these is helpful then I suggest contacting Cisco tech support.

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Cisco VPN error compiling

[root@ATHLONXP vpnclient]# modprobe cisco_ipsec
/lib/modules/2.4.22-ck2/CiscoVPN/cisco_ipsec: The module you are trying to load (/lib/modules/2.4.22-ck2/CiscoVPN/cisco_ipsec) is compiled with a gcc
version 2 compiler, while the kernel you are running is compiled with
a gcc version 3 compiler. This is known to not work.
/lib/modules/2.4.22-ck2/CiscoVPN/cisco_ipsec: insmod /lib/modules/2.4.22-ck2/CiscoVPN/cisco_ipsec failed
/lib/modules/2.4.22-ck2/CiscoVPN/cisco_ipsec: insmod cisco_ipsec failed
This is the error I receive after compiling and install the Cisco VPN client. I had the same problem on CRUX linux. Never had an issue on Debian or RH. ANy ideas?
Greg B

i assume this vpn was installed from a precompiled binary?
the error message tells all. they compiled their vpn with gcc 2.x.x while arch and crux both use gcc 3.x.x. red hat and debian both have gcc2.95 which can run beside gcc3.x.x. likely the kernels you used in those distros were compiled with gcc 2.x.x

Cisco vpn error 51

I have recently purchased a new MacBook Pro, which came with lion installed. I changed it back to snow leopard. I then installed a vpn client. I continually get an error 51 when I try to use it. The description is as follows: '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.' I have made sure that I have an active address on a network which is not the vpn I am attepting to connect to.
Is there something I have forgotten in setting up my wireless or eithernet connection. Both are active and fuctioning properly. Any HELP would be appreciated.
Thank you.

Try opening a terminal window (Applications >> Utilities). At the prompt, enter:
>sudo SystemStarter restart CiscoVPN
This will ask you for the admin password and it will restart the Cisco client service. That should fix it. This seems to be a known issue that will eventually be solved with some updates.
DB

Cisco vpn error

please all how do I troubleshoot error 412 on cisco vpn

Please confirm if the other clients are able to connect via VPN and if you are facing issues with a specific location.
- Captures of UDP port 500 & 4500 on VPN headend is needed to confirm if the client is able to reach out to the VPN server.
- If you have a lot of VPN clients connecting on the VPN headend than try to perform conditional debugs for the client's public address as below:
debug crypto condition peer x.x.x.x / debug crypto condition peer ipv4 x.x.x.x
debug crypto isakmp
- If you dont have the access to the VPN server than you can take wireshark capture on the client machine's physical adapter to see if the you are able to get UDP (port 500/4500) packet back from the VPN server.
Regards,
Tushar Bangia
Note - Please do rate the post if you find it helpful!!

Cisco VPN client crashes with Error 51 on Intel Mac Mini

I am in the process of migrating from XP to Tiger on a brand-new Mac Mini (Intel Duo). Now I am stuck:
I use v 4.8.00 of the Cisco VPN client supplied by my university's IT dept. to connect to the Campus intranet. I have been unable to succesfully use this software, as it crashes upon initializing with "Error 51: Cannot connect to the VPN subsystem." Re-installing the software does not change the state of affairs.
After some research, I used a hack found here (http://www.versiontracker.com/php/feedback/article.php?story=20060107011305622 and http://www.versiontracker.com/php/feedback/article.php?story=20060107011305622) to manually restart the VPN daemon. The Terminal result looks like this:
kld(): warning /System/Library/Extensions/CiscoVPN.kext/Contents/MacOS/CiscoVPN cputype (18, architecture ppc) does not match cputype (7 architecture i386) of objects files previously loaded (file not loaded)
kextload: kldlookup("_kmodinfo") failed for module /System/Library/Extensions/CiscoVPN.kext/Contents/MacOS/CiscoVPN
kextload: a link/load error occured for kernel extension /System/Library/Extensions/CiscoVPN.kext
load failed for extension /System/Library/Extensions/CiscoVPN.kext
(run kextload with -t for diagnostic output)
Not being fluent in Darwin, I can only interpret this to mean that the VPN client is incompatible with the Intel chip in the Mac mini... Is this correct? Is the only way for me to use VPN to wait for a 4.8.x version to be made available?
Hopeful still,
felixx

Also - the Mac VPN system will work with most Cisco networking devices. You can open up the PCF profile that your IT group wants you to use and figure out most of the questions Internet Connect will ask you to set up the VPN connection. For the rest, you have to ask the IT group or try some things and see what works...
cheers,
Mike

Cisco VPN client install fails with Error 1722 on Windows 7

Hi,
I am having issues with laptops upgraded from Vista to Windows 7.
Prior to the upgrade they are running Cisco VPN Client 5.0.05.0290. These laptops also have Juniper Network Connect 6.5 and Citrix web client installed. The windows upgrade advisor made no recommendations regarding uninstalling / reinstalling these apps.
I have done an inplace upgade to Windows 7 (Windows Vista Enterprise 32bit to Windows 7 Enterprise 32 bit) and after the install the Cisco client is not working. Uninstalled the client (the uninstall was successful) then reinstalled and the installation fails at Installing Cisco Systems Virtual Adapter - error 1722 there was a problem with the windows installer package.
I have followed the steps for a manual uninstall of the Cisco client and then tried the install again - still not successful. Interestingly (or not) the Juniper Network Connect also fails with the error The Network Connect Virtual adapter driver is not installed properly. This also fails to reinstall after being removed.
I tried removing the VPN clients on another laptop and then running the upgrade but the same errors occured when reinstalling the VPN Client. I have tried the Winfix and DNE patch from Citrix but these fail saying there is a corruption in the application.
On another laptop where only the Cisco VPN client was installed a reinstall was required after the upgrade, but it did install successfully.
On a clean image these applications all install fine, however I have a large number of laptops do upgrade and don't want to do a fresh install and settings migration on all of them.
What files / registry entrys are involved with the DNE adapter so I can manually clear it all out before reinstalling?
Anything else I can do to troubleshoot this issue?
Cheers,
James

You should be able to install the 64 bit version of the Cisco VPN software
Latest version is vpnclient-winx64-msi-5.0.07.0440-k9.exe
You should download and run MCPR.exe first, to clean out any traces of McAfee products that conflict with Cisco VPN.
http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe
If there is a problem with vbscript registration on the system - there is a fixit tool from Microsoft for that:
MicrosoftFixit50842.msi
(Using Shrew VPN is a possible workaround.)

Failed to install Cisco VPN client 5.0.07.0440 on win 7 64bit [Error 1722]

Hi Gurus,when I tried to install Cisco VPN Client 5.0.07.0440 on Win 7 64bit, the system would pop up an Error 1722( Error 1722. There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor.) at the last stage of copying files. Then it would roll back .
I had tried to clean the temp files, restart windows installer services, and also re-register the MSIEXEC file. However, it would still pop up the error during the installation. For our company, it is a common issue. So, could you please offer me some advice on this?

Thank you for your reply.
I had checked the software again and found out.
1. The MSI installer package is fine, because I can install the software on another PC.
2. It is not like that, because I can start the installation procedure and run it smoothly until on the 88% of copying files.
For now, I had only found this issue on one PC.
Thanks.

Cisco VPN client funktioniert nicht mehr mit Lion! Error 51!! wie kann ich das beheben?

Hello
I just installed Lion on my Mac and until installation I cannot connect to my Cisco VPN client!!
It allways pop up the massages Error 51!
Help needed urgently!

Hallo,
hatte das gleiche Problem mit Cisco VPNClient 4.9. Die Lösung: Einsatz des internen Lion-VPN-Client, zu finden in den Systemeinstellungen > Netzwerk > linke Spalte > +
Funktioniert tadellos.

Cisco VPN Client wont install Error 1406

Hello
I am installing Cisco VPN Client on my Windows 7 32-bit laptop but it doesn't work.
I have downloaded VPN Client ver "vpnclient-win-msi-5.0.07.0410-k9" which is supposed to be assigned for Win 32 bit but i get a lot of error like his:
"Error 1406. Could not write value Maximum Plugins to key \System\Current\Controlset\Services\DNE\Parameters
Verify that you have sufficient access to that key or contact your support personnel.
I have tried a lot of suggestions from the internet but it doesn't seem to work. Please help!

Thank you so much for your response, John.
Yes, i have clicked on "Ignore", however, i receve the same error message for a different address (\System\Current\Controlset\Services\DNE\Parameters) and the Error nuimber changes. It goes from 1401 to 1406.
I Keep Ignoring those error messages but i do get more than 50 of them. And after ignoring a bit more, it gives me some messag stating that "The installation could not be performed" So my only option at that time is "Abort"
:S

Cisco VPN client -install error

Hi,
I have a problem when i'm trying to install Cisco VPN client on my Windows 8.1 x64. After downloading 3 or 4 different versions of Cisco it keeps rising the same error concerning a DLL that is required. I'd really appreciate some advice or the reason why
it keeps rising this error.
Greetings,
Cristina

Hi,
I can't find any compatible information with Windows 8 /8.1 about Cisco VPN client:
http://software.cisco.com/download/release.html?mdfid=281940730&catid=268438162&os=Windows&softwareid=282364316&release=5.0.07.0410&rellifecycle=&relind=AVAILABLE&reltype=latest
You can just check these steps, If following steps didn't work for you, please contact Cisco support for further help.
On Windows 8.1, you will need to update the DNE first:
Download: Ftp://files.citrix.com/dneupdate64.msi
Install Cicso vpn client 5.0.07.0440-k9
http://helpdeskpal.blogspot.ca/
Please Note: This response contains a reference to a third party World Wide Web site. Microsoft is providing this information as a convenience to you. Microsoft does not control these sites and has not tested any software or information found on these
sites; therefore, Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. There are inherent dangers in the use of any software found on the Internet, and Microsoft cautions you to
make sure that you completely understand the risk before retrieving any software from the Internet.
Kate Li
TechNet Community Support

Cisco CA + Cisco VPN Client - Error 42: Unable to create certificate enrolment request

We find ourselves in a difficult situation with the
Cisco VPN Cleint version 5.0.07.0290 where it keeps giving us an
"Error 42: Unable to create certificate enrolment request" when we attempt to use the Online enrolment method to create and enrol a new certificate.
There is no additional information in the VPN client logs where we have set 3-High for all logs.
In addition, Wireshark does not show any packets sent from the machine running the client to the Cisco 3825 router which runs the Cisco CA.
To create and enrol a certificate we do the following:
1. Click on the Enroll button to show the Certificate Enrolment dialog
2. Select Online
3. Select <New> for Certificate Authority
4. Enter http://192.168.120.1 as CA URL (note, 192.168.120.1 is the IP of the Cisco 3825)
5. Click Next to display the dialog where we can enter certificate details
6. Enter details in all fileds except IP Address and Domain
7. Click Enroll which shows a dilaog with the Error 42 ... message in it.
If we attempt to create a request by using the File method, all works fine, that is, the client creates a file with the enrolment request.
The fact that the client does not send any messages to the Cisco CA leads us to belive that we have a pronblem on the clinet machine. However, the client does not write any information in the logs, so it is a bit hard to fix the problem.
We will be grateful for any assistance that you can provide with this issue. I can provide additional configuration information if required for both the client and the Cisco CA. Note that we have not modified any client configuration. Basically, we installed the clinet on a Windows 7 64bit machine and attempted the steps listed above.
Thank you
Emil

FYI, I just came up against this problem and the solution in my instance was to ensure that the Cisco CA Server was configured to automatically grant certificate requests.
Cisco2691#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Cisco2691(config)#crypto pki server CERTSERVER
Cisco2691(cs-server)#grant ?
auto Automatically grant incoming SCEP enrollment requests
none Automatically reject any incoming SCEP enrollment request
ra-auto Automatically grant RA-authorized incoming SCEP enrollment request
Cisco2691(cs-server)#grant auto
% The CS config is locked. You need to shut the server off before changing its configuration.
Cisco2691(cs-server)#shut
Cisco2691(cs-server)#grant auto
Cisco2691(cs-server)#
Mar 25 19:39:53.356: %PKI-6-CS_GRANT_AUTO: All enrollment requests will be automatically granted.
Cisco2691(cs-server)#no shut
% Certificate Server enabled.

Cisco VPN Client 4.8 Error 51

I realize that this is not a Cisco forum, but as I am not a registered Cisco member I thought I would post my Cisco VPN Client 4.8/MBP issues here.
I've been receiving an Error 51 message when attempting to connect to the Cisco VPN since updating to the newest OS updates. In a nutshell this message is stating that I don't have an active network connection. It happens over both wired and wireless connections. I know the network interface is active and I'm able to surf the net without any problems.
I've heard that Cisco released the 4.9 client, but I do not yet have it. I'm waiting to hear back from my network admin on getting the new client version.
Any thoughts or suggestions???

You mean the client I wish I could get, since Cisco doesn't allow downloads, and IT hasn't provided the updated version yet....
And MacUpdate's download page doesn't work anymore either

Error uninstalling Cisco VPN

I am trying to unistall my current installation of the Cisco VPN Client so i can install a newer version but everytime i try i get the following error:
Error 28000: Before installing the Cisco Systems VPN Client 5.0.01.0530. you must uninstall the previous version of Cisco Systems VPN Client, using the Add/Remove Program Files option in the Control Panel. Then restart your system.
This is in Windows Vista Business
Anyone have any ideas how to resolve this?

Why not use the VPN clients own uninstaller? (Via START/Programs/Cisco/uninstall).
However: uninstalling appears to ignore the "old" user data: I uninstalled several times as well by diverse methods, but the new version still new who I was and what I wanted. Not a very clean uninstall, that is. Perhaps a registry cleaner will help, running it after uninstalling?

VPN 720 error with win 8 with Cisco VPN client 5.0.07.0440

Hello,
I have Win 2008 configured as RRAS- VPN server, with win 7/8 VPN clients.
half of these client machines are also running "Cisco VPN client 5.0.07.0440"
all win 7 machines works fine however most of Win 8 will not connect to windows VPN, if they also have Cisco VPN client 5.0.07.0440 intsalled.
Any suggestion.
Thanks

Workaround to this problem is:
1)- Unintsall Cisco VPN client from win 8
2)- reset IP stack

Upgraded to Lion and now getting error 51 when trying to use Cisco VPN Client.

Mac mini with Snow Leopard not having same issue, VPN client works fine. What happened?

Try uninstalling then reinstalling the Cisco software. Cisco VPN may not be compatible with Lion. Check with them about compatibility or upgrade.

CISCO VPN ERROR 51, NNNOOOOOOOOO

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