How to solve HTTP Error 404.15 Not Found error in asp.net?

Question

My ASP.NET MVC application is running on Windows Server 2012 R2, recently the server got a group policy and software update then server restarted. Since then the application gives following error.

HTTP Error 404.15 Not Found

The request filtering module is configured to deny a request where the query string is too long

I followed a few other threads for same issue, when I change maxQueryString to 1024 the application url got 1024 bytes of query string.

I even changed the web.config file to change the max query string. None of it worked - I'm still getting the same error.

What can I do to resolve this issue?

Answer 1

You can try the following methods:

1. Clear your returnUrl Parameter in your Controller Method [HttpPost] Login();

2. Add the following to your web.config:

   <configuration>
     <system.webServer>
       <security>
         <requestFiltering>
           <requestLimits maxQueryString="3000" maxUrl="1000" />
         </requestFiltering>
       </security>
     </system.webServer>
     <system.web>
       <httpRuntime maxQueryStringLength="32768" maxUrlLength="65536"/>
     </system.web>
   </configuration>
   Copy