Cisco Anyconnect Cannot Connect To This Gateway

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  3. How To Configure Cisco AnyConnect VPN Client For Windows Univ...
  4. Cisco Anyconnect Cannot Connect To This Gateway Server
  5. AnyConnect VPN Client FAQ

Contents

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. (Certificates, trustpoints, SSL gateway, SSL context.) Yesterday, we made a 'bad' modif in the router config. Right-click the Cisco AnyConnect VPN Client log, and select Save Log File as AnyConnect.evt. Note: Always save it as the.evt file format. If the user cannot connect with the AnyConnect VPN Client, the issue might be related to an established Remote Desktop Protocol (RDP) session or Fast User Switching enabled on the client PC.

Introduction

This document describes what to do when you enounter this Cisco AnyConnect Secure Mobility Client VPN User Message:

Cisco Anyconnect Cannot Connect To This GatewayAnyConnect VPN Client FAQ

Prerequisites

  • " The bug is fixed in FTD 6.5.0.3." - It's worth mentioning that this patch was pulled from CCO. Please modify this to show that the patch was pulled, so no one goes looking for a patch that doesn't exist anymore or let us know when patch 4 will be released, so that we can plan our updates accordingly.
  • “Failed to install AnyConnect Secure Mobility Client because the process is running in protected mode and cannot perform an install. The secure gateway must be added to the Trusted Sites Zone in Internet Explorer. A VPN connection cannot be established.” Go to Tools Internet Options Security.
  • Right now when users try and connect to the new primary site, they get this error immediately 'Cannot connect to this gateway Please choose another gateway and try again' on their anyconnect 4.6 client desktops. In our webvpn debugs we don't even see the user hit the ASA at all. This is what we've determined thus far.

Requirements

11 Solutions: How To Fix The VPN Authentication Failed ...

There are no specific requirements for this document.

Components Used

The information in this document is based on Windows Vista and Windows 7 operating systems only.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Background Information

Connect

The Base Filtering Engine (BFE) Service

BFE is a service that manages firewall and Internet Protocol security (IPsec) policies and implements user-mode filtering. The security of the system is significantly reduced if you stop or disable the BFE service. It also results in unpredictable behavior in IPsec management and firewall applications.

These system components depend on the BFE service:

  • Internet Key Exchange (IKE) and Authenticated Internet Protocol (AuthIP) IPsec Keying Modules
  • Internet Connection Sharing (ICS)
  • IPsec Policy Agent
  • Routing and Remote Access
  • Windows Firewall

The AnyConnect Secure Mobility Client makes both routing and remote access changes to the host machine. The IKEv2 is also dependent on the IKE modules. This means that, if the BFE service is stopped, The AnyConnect Secure Mobility Client cannot be installed or used to establish a Secure Sockets Layer (SSL) connection.

There are threats in active circulation that disable and remove the BFE service as a first step in the infection process.

Win32/Sirefef (ZeroAccess) Trojan

Win32/Sirefef (ZeroAccess) trojan is a multi-component family of malware that uses stealth to hide its presence on your computer. This threat gives attackers full access to your system. Due to its nature, the payload might vary greatly from one infection to another, although common behavior includes:

Anyconnect
  • Download and execution of arbitrary files.
  • Contact of remote hosts.
  • Disablement of security features.

There are no common symptoms associated with this threat. Alert notifications from installed antivirus software might be the only symptoms.

Win32/Sirefef (ZeroAccess) trojan attempts to stop and delete these security-related services:

  • Windows Defender Service (windefend)
  • IP Helper Service (iphlpsvc)
  • Windows Security Center Service (wscsvc)
  • Windows Firewall Service (mpssvc)
  • Base Filtering Engine Service (bfe)

Caution: Win32/Sirefef (ZeroAccess) trojan is a dangerous threat that uses advanced stealth techniques in order to hinder its detection and removal. As a consequence infection with this threat, you may need to repair and reconfigure some Windows security features.

Problem

The scenarios are:

  • The user cannot install the AnyConnnect Secure Mobility Client and receives the error message, 'The VPN client was unable to setup IP filtering. A VPN connection will not be established.'
  • The AnyConnect Secure Mobility Client worked fine initially. However; the end user can no longer establish a connection and receives the error message, 'Anyconnect was not able to establish a connectoin to the specified secure gateway. Please try connecting again.'

Solution

When these error messages are seen, it is important to confirm whether the BFE is actually disabled/missing or if the client is not able to recognize it. In order to troublehoot, complete these steps:

  1. Access the Service Control Manager (SCM) from the Windows menu:
  2. Search for the BFE service in order to confirm its presence or absence.

If the service works, the status displays as Started. If there is anything else in that column, there is a problem with the service. However, if the status displays as started, the client is clearly not able to communicate with the service, and it is possible there is a bug.

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If the service is disabled or not started, some possible reasons are:

How To Configure Cisco AnyConnect VPN Client For Windows Univ...

  • Malware, as previously explained, disables this service as a first step.
  • Registry corruption on the machine.

Repair Procedure

The first step is to scan and disinfect your system with an antivirus software. You should not restore the BFE service if it will be deleted again by Win32/Sirefef (ZeroAccess) trojan. Download the ESET SirefefCleaner tool from this web page, and save it to your desktop.

This video explains the procedure to remove the Win32/Sirefef (ZeroAccess) trojan:.

Once you have removed Win32/Sirefef (ZeroAccess) trojan, verify that the BFE service can be started and kept active by normal means. In order to do this:

  1. Start SCM and choose the Extended tab instead of the Standard.
  2. Choose the BFE service.
  3. Choose the Start option on the left.

Caution: It is a good practice to back up your files before you attempt this procedure. All information in this article is provided as is, without any warranty, whether express or implied, of its accuracy, completeness, or fitness for a particular purpose.

If this procedure does not work, complete these steps:

Cisco Anyconnect Cannot Connect To This Gateway Server

  1. Download the ESET ServicesRepair utility from this web page, and save it to your desktop.
  2. Execute the ESET ServicesRepair utility.
  3. Follow the prompts in order to repair the BFE service.
  4. Once the utility finishes, restart your computer.
  5. Once your computer restarts, install or execute The AnyConnect Secure Mobility Client again.

AnyConnect VPN Client FAQ

Note: Tests have shown that this tool helps in most cases where the registry files are corrupt or services are damaged. Therefore, if you encounter these error messages, this tool proves useful too:
- The VPN client agent was unable to create the interprocess communication depot.
- The VPN agent service is not responding. Please restart this application after a minute.
- The Cisco Anyconnect Secure Mobility Agent service on Local Computer started and stopped. Some services stop automatically if they are not in use by other services or programs.