Client computers that have certain third-party layered service providers installed cannot connect to a corporate network over SSL VPN connections that are enabled by Intelligent Application Gateway

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Article ID: 955102 - View products that this article applies to.
Important This article contains information that shows you how to help lower security settings or how to turn off security features on a computer. You can make these changes to work around a specific problem. Before you make these changes, we recommend that you evaluate the risks that are associated with implementing this workaround in your particular environment. If you implement this workaround, take any appropriate additional steps to help protect the computer.
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SYMPTOMS

Consider the following scenario:
  • You use the Network Connector feature in Intelligent Application Gateway (IAG) to enable Secure Sockets Layer (SSL) VPN connections to a corporate network.
  • You try to connect to the corporate network through IAG from a client computer that has a third-party layered service provider (LSP) installed.
In this scenario, your attempt to connect to the corporate network is unsuccessful. Additionally, you receive the following error message on the client computer:
The Component Manager detected a conflict between the Whale SSL VPN Socket Forwarding and other networking components installed on your computer. The Whale SSL VPN Socket Forwarding component will be removed from your computer.
If you click Details on the error message box, you receive the following error message:
The following Winsock Layered Service Provider (LSPs) are installed over TCP:
- Third-party layered provider (C:\DriverPathAndFileName)
- Whale SSL VPN (C:\PROGRA~1\WHALEC~1\CLIENT~1\31265D~1.0\WhlLSP.dll

Encountered Winsock error 10091
Note Third-party security applications may install their own LSPs on a client computer.

CAUSE

This problem occurs because of a conflict between the third-party LSP and the LSP that is included in the SSL VPN components of IAG.

WORKAROUND

Warning This workaround may make a computer or a network more vulnerable to attack by malicious users or by malicious software such as viruses. We do not recommend this workaround but are providing this information so that you can implement this workaround at your own discretion. Use this workaround at your own risk.

To work around this problem, find the feature that installs the conflicting LSP on the client computer. Then, disable or uninstall the corresponding program feature that installs the LSP.

Note To use this workaround, you must make sure that the Windows Firewall is enabled. An antivirus program helps protect your computer from viruses. You must not download or open files from sources that you do not trust, visit Web sites that you do not trust, or open e-mail attachments when your antivirus program is disabled.

For more information about computer viruses, click the following article number to view the article in the Microsoft Knowledge Base:
129972 Computer viruses: description, prevention, and recovery

Properties

Article ID: 955102 - Last Review: July 14, 2008 - Revision: 1.1
APPLIES TO
  • Intelligent Application Gateway 2007
  • Whale Communications Intelligent Application Gateway 3.6
Keywords: 
kberrmsg kbtshoot kbexpertiseinter kbprb KB955102

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