Need to secure the files outside the webApp directory???

[sirji]

I need to secure lots of files (PDFs, movies, etc) residing outside the webApp (IIS).

These files can be directly referenced by the user to display in the broswer. I need to be secure the files by prompting login page.

I cannot set the security constraints in the web.xml because the file assets residing outside the webApp and also in a different physical machine in IIS.

Is it possible to configure either weblogic or IIS to prompt for login page when the files accessed directly from the browser.

Any pointers in this regard will be appreciated
Thanks & Regards