How to redirect to custom error page for 404.7 errors

Question

User-1188570427 posted

I want to redirect my website to a generic error page IF they try to get to my .txt files.

I get this error now:

HTTP Error 404.7 - Not Found

The request filtering module is configured to deny the file extension.

but I want to go to my generic error page instead of the 404.7 error.

I have this in my custom errors page, but locally it doesn't work:

    <customErrors mode="On" defaultRedirect="Error.html">
      <error statusCode="404" redirect="Error.html" />
    </customErrors>

Answer 1

User409696431 posted

Try adding

   <system.webServer>
      <httpErrors errorMode="Custom">
         <remove statusCode="404"/>
         <error statusCode="404" path="/Error.html" />
      </httpErrors>
   </system.webServer>

customErrors handles pages processed by asp.net.  httpErrors can handle static files and other extensions not handled by asp.net.

Answer 2

User283571144 posted

Hi tvb2727,

As far as I know, the 404.7 means the request filtering is actually filtering for a blank file name. Therefore you have to add this to the request filtering block in the web.config:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <security>
      <requestFiltering>
        <fileExtensions allowUnlisted="true" >
          <remove fileExtension=".txt" />
          <add fileExtension=".txt" allowed="true"/>
        </fileExtensions>
      </requestFiltering>
    </security>
  </system.webServer>
</configuration>

Then it will pass the IIS and use your own custom page.

Best Regards,

Brando

Answer 3

User-1188570427 posted

Try adding

   <system.webServer>
      <httpErrors errorMode="Custom">
         <remove statusCode="404"/>
         <error statusCode="404" path="/Error.html" />
      </httpErrors>
   </system.webServer>

customErrors handles pages processed by asp.net.  httpErrors can handle static files and other extensions not handled by asp.net.

This worked KathyW

Thank you!