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Editorial Team
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Asked: 2026-06-05T05:27:49+00:00

I ran into a rather.. interesting problem. .por is not a common extension, though

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I ran into a rather.. interesting problem.

.por is not a common extension, though it is used by hero lab’s for their portfolio of characters. Putting it on my win 7 laptop with IIS 7.5, the filename will be there when a directory listing is generated by the server via directory browsing and using a web browser at the local host.

BUT, attempting to download it results in a 404. The file extension itself points to a real old corel draw file format. This behavior I can replicate easily with a .junk extension as well.

/why/ is this happening? I would like to know not only how it’s configured to behave that way but what modules are involved as well.

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1 Answer

  1. Editorial Team

    The extension is not mapped to a known mime type – you need to add a mime type for this extension.

    IIS 7 will not return file types that are not added to the element or that have mappings in the element by default. This behavior prevents unauthorized access to files that do not have mappings in the IIS 7 configuration settings.

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