ASMX will not be served by the static file handler resolution

Back-end Development

Getting a 403 error "The requested content appears to be script and will not be served by the static file handler" when trying to access a ASMX .NET service location. It took me a while to figure this one out, but here is the solution...

  • Open IIS Manager and go to your site or virtual directory.
  • Click on the Handler Mappings

 

  • This is where different extensions are mapped and the solution to the problem may be adding one that is missing.
  • Look for WebServiceHandlerFactory-ISAPI-2.0-64 and WebServiceHandlerFactory-ISAPI-2.0

 

  • If your getting this error you may not have a 32 bit mapping for ASMX files.  So you simply need to add one.
  • Click on Add Module Mapping...
  • Now setup an ISAPI mapping for all ASMX files that points to the 32 bit version of the ASP .NET Framework ISAPI module.

 

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About the Author

Mike Bopp

Mike Bopp
Mike is the Managing Director of Rapid Development Group, where he drives strategy and operations while also leading multiple software development projects.