Anyconnect 4.2 - VPN Driver encountered an Error

davidgray891 · ‎12-16-2016

Having issues getting my any connect to establish a VPN. I am running version 4.2.06014. When attempting to connect the message history shows:

16/12/2016
15:54:50 Ready to connect.
16:03:01 Contacting *************.
16:03:46 User credentials entered.
16:03:46 Establishing VPN session...
16:03:47 The AnyConnect Downloader is performing update checks...
16:03:47 Checking for profile updates...
16:03:47 Checking for product updates...
16:03:47 Checking for customization updates...
16:03:47 Performing any required updates...
16:03:47 The AnyConnect Downloader updates have been completed.
16:03:47 Establishing VPN session...
16:03:47 Establishing VPN - Initiating connection...
16:03:47 Establishing VPN - Examining system...
16:03:47 Establishing VPN - Activating VPN adapter...
16:04:28 Establishing VPN - Repairing VPN adapter...
16:05:11 Disconnect in progress, please wait...
16:05:11 The VPN client driver encountered an error. Please restart your computer or device, then try again.
16:05:11 AnyConnect was not able to establish a connection to the specified secure gateway. Please try connecting again.
16:05:11 Ready to connect.

I have tried newer and older versions of anyconnect, I have also tried a lot of fixes specified on the internet and cisco. Like making changes to registry settings, repairing databases etc.

From windows logs I can see some of the following errors:

Function: CVirtualAdapter::EnableVA
File: .\WindowsVirtualAdapter.cpp
Line: 2358
Unable to obtain the interface info after 20 tries (connection name: , interface indexes: 0 (IPv4), 0 (IPv6))

Function: CVirtualAdapter::EnableVA
File: .\WindowsVirtualAdapter.cpp
Line: 2312
Invoked Function: CVirtualAdapter::EnableVA64
Return Code: -33554423 (0xFE000009)
Description: GLOBAL_ERROR_UNEXPECTED

Function: CVAMgr::enableHostMgr
File: .\VAMgr.cpp
Line: 575
Invoked Function: CVirtualAdapter::EnableVA
Return Code: -26935281 (0xFE65000F)
Description: VIRTUALADAPTER_ERROR_START_DRIVER
Failed to enable VA, attempting to repair.

Function: ConnectMgr::processIfcData
File: .\ConnectMgr.cpp
Line: 3104
Invoked Function: ConnectMgr::initiateTunnel
Return Code: -29622263 (0xFE3C0009)
Description: CONNECTMGR_ERROR_UNEXPECTED

Function: CVpnMgr::main
File: .\VpnMgr.cpp
Line: 1923
Invoked Function: IHostMgr::enableHostMgr
Return Code: -26935281 (0xFE65000F)
Description: VIRTUALADAPTER_ERROR_START_DRIVER

Function: CVAMgr::enableHostMgr
File: .\VAMgr.cpp
Line: 626
Invoked Function: CVirtualAdapter::EnableVA
Return Code: -26935281 (0xFE65000F)
Description: VIRTUALADAPTER_ERROR_START_DRIVER

Any ideas ?

JP Miranda Z · ‎12-16-2016

Hi davidgray891,

In this case an adapter issue could be caused from many different reasons:

-Antivirus or Firewall not letting the AnyConnect initiate properly.

-3rd party applications conflicting with the AnyConnect.

So the following link includes the steps to troubleshoot the VPN Client Driver Encounters Error:

http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/100597-technote-anyconnect-00.html#anc14

This link includes the information about some of the known 3rd party applications that conflict with the AnyConnect and some other information about the adapter issues:

http://www.cisco.com/c/en/us/td/docs/security/vpn_client/anyconnect/anyconnect42/administration/guide/b_AnyConnect_Administrator_Guide_4-2/troubleshoot-anyconnect.html

From my expirience i will try removing any antivirus or 3rd vpn application from the computer, if this is not working i will try a re-image on the computer since this could even be a registry corruption.

Hope this info helps!!

Rate if helps you!!

-JP-