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Editorial Team
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Asked: 2026-06-03T05:54:11+00:00

Our mvc application sets the response status code to 401 and sets TrySkipIisCustomErrors to

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Our mvc application sets the response status code to 401 and sets TrySkipIisCustomErrors to true under some circumstances.

I can see from the IIS log that it is getting this status code:

2012-05-04 01:32:42 10.212.98.183 POST /v1.07/session - 80 - 10.24.22.26 curl/7.20.1+(i686-pc-cygwin)+libcurl/7.20.1+OpenSSL/0.9.8r+zlib/1.2.5+libidn/1.18+libssh2/1.2.5 401 0 0 48325

However the response I receive in the client is 500:

< HTTP/1.1 500 Internal Server Error
< Content-Type: text/html
< Server: Microsoft-IIS/7.0
< Date: Fri, 04 May 2012 02:31:18 GMT
< Content-Length: 75
<
* Connection #0 to host webserver left intact
* Closing connection #0
The page cannot be displayed because an internal server error has occurred.

I have tried various other settings in the web.config for the mvc application around httpErrors and customErrors, none of which seem to make a difference.

How can I configure IIS to return the actual response and not 500?

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1 Answer

  1. Editorial Team

    So after a lot more googling, I changed the applicationHost.config file to allow delegation of httpErrors and now I get the correct response back to the client.

    I had to set the following from Deny to Allow:

    <section name="httpErrors" overrideModeDefault="Allow" />

    I tried to follow the instructions in the file to use a <location> tag:

    <location path="" overrideMode="Allow">
  <system.webServer>
    <httpErrors />
  </system.webServer>
</location>

    but this did not work. It would work if I specified the web site in the path, rather than all sites though, however, I want to allow it for all the sites on the web server.

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