How To Configure IIS To Serve 404 Response With Custom Content
Mar 31, 2010
I would like to serve a custom 404 page from ASP.NET MVC. I have the route handler and all the infrastructure set up to ensure that nonexistent routes are handled by a single action:
public ActionResult Handle404()
{
Response.StatusCode = 404;
return View("NotFound");
}
Problem: IIS serves back its own content (some predefined message) when I set Response.StatusCode to 404 before returning the content.
On the VS development web server, this works as intended - the status code of the HTTP response is 404 while my content (the NotFound view) is served.
I believe that when the IIS processing pipeline sees that the application returns 404, it simply replaces the whole response with its own.
What setting in IIS affects this behavior?
I do not have access to the IIS installation so I can not investigate this - however, I can ask the hosting provider to tweak the configuration for me if I know what exactly needs to be changed.
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