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Microsoft KB Archive/170856

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Knowledge Base

Article ID: 170856

Article Last Modified on 6/23/2005


  • Microsoft Internet Information Server 3.0

This article was previously published under Q170856

We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:


When you set Internet Information Server (IIS) to log to a text file, and you select Automatically Open New File Daily, Weekly, or Monthly, the current log file may still become truncated. As a result, further logging will be directed to the Inetsvn.log file.


Use one of the following methods:

Method 1

WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.

  1. Edit Registry for each service.
  2. Set Parameters/LogFileTruncateSize to 0xffffffff.

Method 2

  1. Force the registry to write correct value into Parameters/LogFileTruncateSize through InetMgr.
  2. Change the logging properties by selecting When File Size Reaches option. Edit a new size, and click Apply.
  3. Go back to original Open New File Daily option. The behavior will now be correct.


Microsoft has confirmed this to be a problem in Microsoft Internet Information Server version 3.0.

Keywords: kbbug kbpending kbbug3.00 KB170856