Re: Proxy Error 502.. This might help you. :)
by
Anonymous
·
about 15 years, 9 months ago
In reply to Proxy Error 502
Users receive an -Error Code 502. Proxy error.
Users receive an “Error Code 502: Proxy error. The parameter is incorrect. (87)” error when they visit certain URLs after you configure HTTP content filtering based on signatures or on extensions in ISA Server 2004
SYMPTOMS
After you configure Microsoft Internet Security and Acceleration (ISA) Server 2004 to filter HTTP content based on signatures or on extensions, users in your organization experience the following symptom.
When a user visits certain URLs, that user receives the following error message in the Web browser:
Error Code 502: Proxy error. The parameter is incorrect. (87)
If you remove all signatures and extensions from the HTTP Filter settings, and if you configure the HTTP Filter component to allow all signatures and extensions, you no longer experience this problem.
Note For more information about how to configure the ISA Server 2004 HTTP Filter component, see the “More Information” section.
CAUSE
This problem occurs because of a problem in the ISA Server 2004 HTTP Security Filter component. This component is named HTTPFilter.dll.
RESOLUTION
Service pack information
To resolve this problem, obtain the latest service pack for Internet Security and Acceleration Server 2004. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
891024 http://support.microsoft.com/contactus/?ws=support
How to obtain the latest ISA Server 2004 service pack
Hotfix Information
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a “Hotfix download available” section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note The “Hotfix download available” form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
Prerequisites
If you are running ISA Server 2004, Standard Edition, you must have ISA Server 2004 Service Pack 1 installed to apply this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
891024 (http://support.microsoft.com/kb/891024/) How to obtain the latest ISA Server 2004 service pack
Restart requirement
You do not have to restart your computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
ISA Server 2004, Standard Edition
Date Time Version Size File name
———————————————————
31-Mar-2005 18:22 4.0.2163.251 120.320 HTTPFilter.dll
ISA Server 2004, Enterprise Edition
Please post back if you have any more problems or questions.
