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Editorial Team
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Asked: 2026-06-10T04:31:33+00:00

I have a Sitecore solution, where we handle 404 requests. We do that by

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I have a Sitecore solution, where we handle 404 requests.

We do that by setting “ErrorPage” and the “ItemNotFoundUrl” in the web.config:

<setting name="ErrorPage" value="/sitecore/service/error.aspx" />

And

<setting name="ItemNotFoundUrl" value="/Global/ErrorPages/404" />

Now, this works when we edit the name of the page. So if we have http://www.domain.com/mypage.aspx , and go to http://www.domain.com/mysdfsa.aspx which doesn’t exist, it will show our error-page.

However, if we go to something like:

http://www.domain.com/mypage.zip / http://www.domain.com/mypage.gosfgfgs

It gives the IIS error:

Error Summary
HTTP Error 404.0 - Not Found
The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.

What have I tried?

We need to make it for for ZIP files at least.

  • Made sure that .ZIP is added to both IIS and Sitecore MIME types
  • Hooked in before the ExecuteRequest pipeline and tried to redirect (this is never called because the IIS gives the errorpage before we get to execute the request)

Any ideas? 🙂 Thanks

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1 Answer

  1. Editorial Team

    I think in the <preprocessRequest> pipeline there’s a processor for extensions that Sitecore handles. You should try to update that:

    <processor type="Sitecore.Pipelines.PreprocessRequest.FilterUrlExtensions, Sitecore.Kernel">
  <param desc="Allowed extensions (comma separated)">aspx, ashx, asmx</param>
  <param desc="Blocked extensions (comma separated)">*</param>
  <param desc="Blocked extensions that stream files (comma separated)">*</param>
  <param desc="Blocked extensions that do not stream files (comma separated)"></param>
</processor>
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