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DocumentationFREBUIModule Documentation
Updated onDecember 4, 2007
Uploaded byrakkimk


IIS7 has an inbuilt FREB module which does the Failed Request tracing. Read more about FREB here . In a nutshell, it is similar to ETW tracing. It is now in-built (optional) functionality of IIS7. This will create XML files which will be stored in C:\Inetpub\logs\FailedReqLogFiles\W3SVC*. * - website identifier. My module will give an UI interface to display all available files with their name, path, URL and status code.


  • Displays FREB XML files and has an inbuilt browser where you can preview them
  • Has a inbuilt web browser with pre-added cool IIS/ASP.NET websites
  • iisRequests tab which will display the current running requests. A GUI alternative to appcmd.exe (only for listing the current no. of w3wp.exe running, no. of AppDomains, no. of Clients connected and their details).


  • UI for viewing current requests and save them to a file
  • Inbuilt web-browser with pre-added cool site


To add this module in your IIS 7 manager follow the below steps:

1.    Save the FREBUI.dll in the inetsrv folder.

2.    From inetsrv folder Drag and Drop the FREBUI.dll into the Global Assembly Cache (C:\Windows\assembly).

3.    Under File Menu, browse for the file %systemdrive%\Windows\System32\InetSrv\config\Administration.config.

4.    Search for the <moduleProviders> section and add the following<add name="FREBUI" type="FREBUI.MyModuleProvider, FREBUI,  Version=, Culture=neutral, PublicKeyToken=263cc0ac07d7d4b6" />

5.    Search for the <modules> section and add the following<add name="FREBUI" />

6.    Open Inetmgr and You will see the module listed in your IIS 7 Manager if you would’ve followed the above steps properly.