Ip Forwarding Table Modifications Anyconnect Mac



The VPN client was unable to modify the IP forwarding table. A VPN connection will not be established. Please restart your computer or device, then try again. Description AnyConnect failed to apply all the VPN configuration settings to the endpoint IP forwarding table. Oct 25, 2013 Using Cisco AnyConnect Secure Mobility v3.1.01065 and connection fails every time. I get the following message: 'The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established.' Followed by: 'AnyConnect was not able to establish a connection to the specified secure gateway. Symptom: After upgrading to Anyconnect 4.4.03034, RA VPN connections from MacOS clients cannot be established anymore displaying the following error: 'The VPN client was unable to successfully verify the IP forwarding table modifications. Any one know how to hack the routing table (on a mac) to defeat the forcing of VPN routing for every thing over a cisco VPN? Pretty much what I want to do is have only 10.121. and 10.122. addresses over the VPN and everything else straight to the internet. The following works for me. Run these after connecting to the cisco vpn. In order to access the enterprise intranet remotely, we have to use the Cisco AnyConnect VPN client. We're allowed to install it on any personal machines, and they provide downloads and instructions for Windows, Mac and Linux. This works fine except for the routing table configurations they provide.

A user connecting from Vista 64 with the Cisco AnyConnect client was getting a “The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established.” error when trying to connect. No changes had been made to the concentrator configuration which is an asa5520 running 8.0(3).

Via ASDM, there was a syslog notification of “SVC Message: 17/ERROR: Unable to successfully verify all routing table modifications are correct.”

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Also annoyingly, the license only supports 2 clientless ssl vpn connections and the ssl vpn client appears to use a clientless connection initally which fails to shut down then the ssl client fails to connect, which prevents future logins with not error on the client side due to the licensing.

I found this article which linked the proble to Adobe Photoshop. The user had installed the photoshop trial recently and when he disabled bonjour for windows, which was installed by photoshop, the VPN worked fine.

I installed Bonjour on XP 32bit and could not reproduce the problem. Perhaps it’s a Vista 64 issue. It’s a small enough of an edge case that I don’t think I’ll try to reproduce.

Mac

User says: “it had a really odd name #1_Service_name###. it was added when I installed Adobe”

Contents

Introduction

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

Prerequisites

Requirements

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

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:

  • 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:

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  • 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: Mac for laptops.

  • 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:

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  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.

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

  • 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.

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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:

  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.

Ip Forwarding Table Modifications Anyconnect Mac

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.