Asp net core windows authentication keeps asking for credentials in iis express


ASP.NET is a popular programming language used for building web applications. One issue that developers face is the continuous prompting for credentials when using Windows Authentication in IIS Express. In this article, we will explore the possible solutions to this problem and provide examples to help you it.

Understanding the Issue

When using Windows Authentication in IIS Express, you may encounter a situation the browser repeatedly asks for credentials, even though you have already provided them. This can be frustrating for both developers and users, as it interrupts the functioning of the application.

Possible Solutions

There are several potential solutions to this problem. Let's explore some of them:

1. Enable Windows Authentication in IIS Express

The first step is to that Windows Authentication is enabled in IIS Express. To do this, open the project properties and navigate to the Debug tab. Under the Web Server Settings section, make sure that Windows Authentication is selected. Save the changes and try running the application again.

// Example 1: Enabling Windows Authentication in IIS Express

2. Configure Authentication Modes

Another solution is to configure the authentication modes in the web.config file. You can specify the order in which authentication methods are used by modifying the section. Ensure that Windows Authentication is listed before other authentication methods such as Anonymous Authentication.

// Example 2: Configuring Authentication Modes in web.config

3. Application Pool Identity

Verify the identity of the application pool running your application. Ensure that it has the necessary permissions to access the required . You can set the identity to a specific user or use the built-in ApplicationPoolIdentity.

// Example 3: Checking Application Pool Identity

4. Clear Browser Cache and Cookies

, the issue may be related to cached credentials or cookies in the browser. Clearing the cache and cookies can help resolve this problem. Instruct your users to clear their browser data and try accessing the application again.

// Example 4: Clearing Browser Cache and Cookies

5. Check Group Policy Settings

Group Policy settings on the server or client machines can also affect Windows Authentication. Ensure that the necessary policies are configured correctly to allow seamless authentication.

// Example 5: Checking Group Policy Settings


Continuous prompting for credentials in Windows Authentication can be a frustrating issue. However, by following the solutions mentioned above, you can resolve this problem and ensure a smooth user experience. Remember to enable Windows Authentication in IIS Express, configure authentication modes, check application pool identity, clear browser cache and cookies, and verify group policy settings. By implementing steps, you can overcome the issue and provide a seamless authentication experience for your users.

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