The error message "You do not have permission to view this directory or page" typically indicates an issue with the configuration of your Azure Web App. It can occur due to various reasons, and here are some common troubleshooting steps to address the problem:

  1. Check Azure App Service Settings: Ensure that your Azure Web App is correctly configured and deployed. Verify that the correct deployment files are present and that the application is running in the appropriate environment (e.g., Windows or Linux).

  2. Verify Application Root Path: Double-check that your application is deployed to the correct root path. The root path for your application is usually /site/wwwroot/. Make sure your application's files and folders are placed in this directory.

  3. Check Startup File: Ensure that the correct startup file for your application is present in the root directory. For example, for a Node.js app, the startup file is typically server.js or app.js. For a .NET Core app, it is usually web.config or startup.cs.

  4. Review App Service Authentication Settings: Check your Azure App Service authentication settings. Make sure that the authentication settings are configured correctly to allow access to the application. If you have enabled authentication, ensure that it is set up properly.

  5. Check IP Whitelisting or Network Security Groups (NSGs): Verify that your Azure Web App is accessible from the IP address or IP range you are trying to access it from. If you have IP whitelisting or Network Security Groups (NSGs) configured, ensure that the necessary IPs are allowed to access the app.

  6. Review Web.config or .htaccess Files: If you are using a .NET app or a PHP app hosted on Azure App Service, check your web.config or .htaccess files for any misconfigurations that could be causing the access issue.

  7. Check Custom Domain Settings: If you have a custom domain set up for your Azure Web App, verify that it is correctly configured. Ensure that the DNS records are correctly pointing to the Azure Web App's IP address or hostname.

  8. Test with Incognito/Private Browsing: Sometimes, caching issues or stored cookies in the browser can cause access problems. Try accessing the app in incognito or private browsing mode to rule out any caching or cookie-related issues.

  9. Check App Service Plan Permissions: Ensure that the user or service principal associated with your Azure App Service Plan has the necessary permissions to access the app. Make sure that the user/service principal has the appropriate role assignments.

  10. Review Application Code and Logs: Examine your application code and logs to see if there are any specific errors or issues that might be causing the access problem.

By following these troubleshooting steps, you should be able to identify and resolve the "You do not have permission to view this directory or page" error on your Azure Web App. If the issue persists, consider reaching out to Azure support for further assistance.

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