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See the IIS Help file for more information.įor more information about other, less common causes of this error message, see IIS hidden static files return HTTP 404 or Access Denied errors. Use the IIS Microsoft Management Console (MMC) snap-in to configure the appropriate extension in the MIME Map. IIS Static Content: A 404.3 entry in the W3C Extended Log file is recorded when an extension is not mapped to a known extension in the MIME Map property. See the IIS Help File for more information. Custom extensions must be added and explicitly enabled. Default Web Extensions include: ASP, ASP.NET, Server-Side Includes, WebDAV publishing, FrontPage Server Extensions, Common Gateway Interface (CGI). Use the IIS Microsoft Management Console (MMC) snap-in to enable the appropriate Web extension. IIS Dynamic Content: A 404.2 entry in the W3C Extended Log file is recorded when a Web Extension is not enabled. This means that you must verify that the File1.htm file is located in the c:\Information directory (and that the file name is spelled correctly). This virtual directory must be mapped to a subfolder on a drive or reference the files by name.įor example, assume that the URL that caused the 404 error is, and the IIS snap-in shows that for Microsoft.Com Web site, the /Test/ directory is actually a virtual directory that maps to the location of c:\Information on the IIS computer. A VDIR is a directory that is not contained in the home directory of the Web site, but appears to client browser as though it does. This is important if the Web site uses a virtual directory (VDIR). Use the IIS Microsoft Management Console (MMC) snap-in to determine where the file requested must exist in the IIS computer's file system. To resolve this problem, verify that the file requested in the browser's URL exists on the IIS computer and that it is in the correct location. A virtual directory is mapped to the root of a drive on another server.Essentially, a 404 error occurs when the information that you requested is not available. IIS 6.0: The appropriate Web service extension or MIME type is not enabled. A 404 error is a common error and can be caused by a number of issues.The requested file is temporarily unavailable due to maintenance, upgrades, or other unknown causes.The requested file has been moved to another location and/or deleted.The following are some common causes of this error message: The Web server returns the HTTP 404 - File not found error message when it cannot retrieve the page that was requested. You receive the following error message further down on the Web page: The page you are looking for might have been removed, had its name changed, or is temporarily unavailable. When a Web page is requested, you receive the following error message at the top of the Web browser: Original product version: Internet Information Services Original KB number: 248033 Symptoms End users that experience these errors should notify the Web site administrator of the problem. This article is intended for Web site administrators.