Cisco Anyconnect Unable To Contact Server

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I was trying to log into work but had trouble making a VPN connection. I use Cisco AnyConnect VPN Client. This post describes how to fix the following error messages when using Windows 8 Pro:

  • AnyConnect was not able to establish a connection to the specified secure gateway. Please try connecting again.

Cisco Anyconnect No Network Access

3) Go to: C: Users Username AppData Local Cisco Cisco AnyConnect Secure Mobility Client 4) Delete preferences.xml 5) Right click the Cisco icon in system tray and quit Cisco AnyConnect 6) L aunch the VPN after deleting everything, put vpn.illinois.edu in the server window and use your NetID and password to log in via the 'Split Tunnel' profile. We have a Cisco 881 router hosting a SSL webvpn gateway. This gateway is used by mobile users to connect through AnyConnect 4.4. This system was correctly configured and working perfectly.

  • The VPN client driver encountered an error. Please restart your computer or device, then try again.

The steps to fix this problem are as follows:

1. Edit a registry entry by running a program called regedit. Right-click on it and Run as administrator. Note that I use Start8, by Stardock, to have a Start button and menu. After you left-click on Run as administrator, your computer might ask you to enter the admin password.

2. Go to the appropriate VPN registry directory called ComputerHKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesvpnva

3. Double left-click the DisplayName key.

An Edit String pop-up window will appear.

The text under the Value data: field on my computer looked like this.

@oem20.inf,%vpnva_Desc%;Cisco AnyConnect VPN Virtual Miniport Adapter for Windows x64

4. Change the field to

Cisco AnyConnect VPN Virtual Miniport Adapter for Windows x64

by removing all the text and characters that are on the left of the word Cisco.

The end result should look like this:

Unable to connect vpn server cisco anyconnect

5. Left-click the ‘OK’ button.

6. Exit the Registry Editor

7. Run Cisco AnyConnect VPN Client and reconnect.

That’s all there is to it. Good luck!

Update : 2/13/2014

I recently updated my computer on February 13, 2014 with Microsoft’s updates and saw that the text under the Value data: field on my computer looked like this:

@oem10.inf,%VPNVA64_Desc%;Cisco AnyConnect Secure Mobility Client Virtual Miniport Adapter for Windows x64

It is different from what I had originally posted. I’m not really sure how or why it changed and I don’t have time to find out. I also updated to Cisco AnyConnect Secury Mobility Client Version 3.1.04066. As far as I can tell, the value of …

@oem10.inf,%VPNVA64_Desc%;Cisco AnyConnect Secure Mobility Client Virtual Miniport Adapter for Windows x64

.. works, but the value of

Cisco AnyConnect VPN Virtual Miniport Adapter for Windows x64

does not work with Cisco AnyConnect Secury Mobility Client Version 3.1.04066.

Update : 2/15/2014

Changing the Value data: field to

Cisco AnyConnect Secure Mobility Client Virtual Miniport Adapter for Windows x64

without

@oem10.inf,%VPNVA64_Desc%;

seems to work better, too.

Objective

The objective of this document is to show you basic troubleshooting steps on some common errors on the Cisco AnyConnect Secure Mobility Client. When installing the Cisco AnyConnect Secure Mobility Client, errors may occur and troubleshooting may be needed for a successful setup.

Note that the errors discussed in this document is not an exhaustive list and varies with the configuration of the device used.

For additional information on AnyConnect licensing on the RV340 series routers, check out the article AnyConnect Licensing for the RV340 Series Routers.

Software Version

  • AnyConnect v4.x (Link to download)

Policy

Basic Troubleshooting on Cisco AnyConnect Secure Mobility Client Errors

Note: Before attempting to troubleshoot, it is recommended to gather some important information first about your system that might be needed during the troubleshooting process. To learn how, click here.

Security

1. Problem: Network Access Manager fails to recognize your wired adapter.

Solution: Try unplugging your network cable and reinserting it. If this does not work, you may have a link issue. The Network Access Manager may not be able to determine the correct link state of your adapter. Check the Connection Properties of your Network Interface Card (NIC) driver. You may have a 'Wait for Link' option in the Advanced Panel. When the setting is On, the wired NIC driver initialization code waits for auto negotiation to complete and then determines if a link is present.

2. Problem: When AnyConnect attempts to establish a connection, it authenticates successfully and builds the Secure Socket Layer (SSL)session, but then the AnyConnect client crashes in the vpndownloader if using Label-Switched Path (LSP) or NOD32 Antivirus.

Solution: Remove the Internet Monitor component in version 2.7 and upgrade to version 3.0 of ESET NOD32 AV.

Cisco

3. Problem: If you are using an AT&T Dialer, the client operating system sometimes experiences a blue screen, which causes the creation of a mini dump file.

Solution: Upgrade to the latest 7.6.2 AT&T Global Network Client.

4. Problem: When using McAfee Firewall 5, a User Datagram Protocol (UDP)Datagram Transport Layer Security (DTLS) connection cannot be established.

Solution: In the McAfee Firewall central console, choose Advanced Tasks > Advanced options and Logging and uncheck the Block incoming fragments automatically check box in McAfee Firewall.

5. Problem: The connection fails due to lack of credentials.

Solution: The third-party load balancer has no insight into the load on the Adaptive Security Appliance (ASA) devices. Because the load balance functionality in the ASA is intelligent enough to evenly distribute the VPN load across the devices, using the internal ASA load balancing instead is recommended.

Cisco Anyconnect Cannot Connect To Policy Server

6. Problem: The AnyConnect client fails to download and produces the following error message:

Solution: Upload the patch update to version 1.2.1.38 to resolve all dll issues.

7. Problem: If you are using Bonjour Printing Services, the AnyConnect event logs indicate a failure to identify the IP forwarding table.

Solution: Disable the Bonjour Printing Service by typing net stop “bonjour service” at the command prompt. A new version of mDNSResponder (1.0.5.11) has been produced by Apple. To resolve this issue, a new version of Bonjour is bundled with iTunes and made available as a separate download from the Apple web site.

8. Problem: An error indicates that the version of TUN or network tunnel is already installed on this system and is incompatible with the AnyConnect client.

Solution: Uninstall the Viscosity OpenVPN Client.

9. Problem: If a Label-Switched Path (LSP) module is present on the client, a Winsock catalog conflict may occur.

Solution: Uninstall the LSP module.

10. Problem: If you are connecting with a Digital Subscriber Line (DSL) router, DTLS traffic may fail even if successfully negotiated.

Solution: Connect to a Linksys router with factory settings. This setting allows a stable DTLS session and no interruption in pings. Add a rule to allow DTLS return traffic.

11. Problem: When using AnyConnect on some Virtual Machine Network Service devices, performance issues have resulted.

Solution: Uncheck the binding for all IM devices within the AnyConnect virtual adapter. The application dsagent.exe resides in C:WindowsSystemdgagent. Although it does not appear in the process list, you can see it by opening sockets with TCPview (sysinternals). When you terminate this process, normal operation of AnyConnect returns.

12. Problem: You receive an “Unable to Proceed, Cannot Connect to the VPN Service” message. The VPN service for AnyConnect is not running.

Solution: Determine if another application conflicted with the service by going to the Windows Administration Tools then make sure that the Cisco AnyConnect VPN Agent is not running. If it is running and the error message still appears, another VPN application on the workstation may need to be disabled or even uninstalled. After taking that action, reboot, and repeat this step.

13. Problem: When Kaspersky 6.0.3 is installed (even if disabled), AnyConnect connections to the ASA fail right after CSTP state = CONNECTED. The following message appears:

Solution: Uninstall Kaspersky and refer to their forums for additional updates.

14. Problem: If you are using Routing and Remote Access Service (RRAS), the following termination error is returned to the event log when AnyConnect attempts to establish a connection to the host device:

Cisco Anyconnect Unable To Contact Server Number

Solution: Disable the RRAS service.

15. Problem: If you are using a EVDO wireless card and Venturi driver while a client disconnect occurred, the event log reports the following:

Solutions:

  • Check the Application, System, and AnyConnect event logs for a relating disconnect event and determine if a NIC card reset was applied at the same time.
  • Ensure that the Venturi driver is up to date. Disable Use Rules Engine in the 6.7 version of the AT&T Communications Manager.

If you encounter other errors, contact the support center for your device.

For further information and community discussion on AnyConnect licensing updates, click here.

Cisco Anyconnect Unable To Contact Servers

For AnyConnect Licensing FAQs, click here.