How to Override Request Length Limits in Web.config to Fix HTTP Error 404.15?

Overriding Request Length Limitations in Web.config

When receiving extensive requests, you may encounter an HTTP Error 404.15, indicating that the query string length exceeds the allowed limit. To resolve this issue, modifications to the web.config settings are necessary.

To configure Web.config for handling requests of any length, follow these steps:

1. Locate the web.config file within the web application directory.
2. Add the following code under the section:

<security>
    <requestFiltering>
        <requestLimits maxQueryString="32768" />
    </requestFiltering>
</security>

This code overrides the default request filtering limits and allows requests with query strings up to 32,768 characters in length.

3. Next, add the following code under the section:

<httpRuntime maxQueryStringLength="32768" maxUrlLength="65536" />

This code extends the maximum query string length and URL length to 32,768 and 65,536 characters, respectively.

These modifications to the web.config configuration allow the server to accept and process requests of any length, resolving the HTTP Error 404.15. It's important to note that the numerical values provided are examples and can be adjusted as needed to accommodate your specific requirements.

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