Learn how to ensure IIS HTTP detailed errors are hidden from displaying to protect your website and sensitive server information. Our Live Support Team is always here to help you.
How to Ensure IIS HTTP Detailed Errors Are Hidden from Displaying
Every website occasionally encounters errors. During testing, it’s common to show detailed error messages to troubleshoot issues quickly. However, leaving these details exposed to remote users is risky. Hackers can use this information to discover server paths, configuration details, or vulnerabilities. That’s why it is essential to ensure IIS HTTP detailed errors are hidden from displaying.
By taking control of error page settings, you can prevent sensitive information from being exposed, all while still viewing full details locally for debugging purposes. Let’s go through the configuration.
An Overview
Why Detailed Error Messages Should Be Hidden
Exposing detailed errors remotely can create security risks. The messages can reveal how your application functions, open unnecessary attack vectors, and even expose file paths. Default IIS configurations might display detailed errors for remote users unless adjusted. Therefore, hiding these errors is not just best practice, it’s necessary for security.
Configure Error Pages Using IIS Manager
To hide detailed errors for remote users, follow this approach:
1. Open IIS Manager with Administrative privileges.
2. In the Connections pane on the left, expand the server, then expand the Sites folder.
3. Select the website or application you want to configure.
4. In Features View, select Error Pages, then in the Actions pane, choose Open Feature.
5. Click on Edit Feature Settings in the Actions pane.
6. In the Edit Error Pages Settings dialog, under Error Responses, choose either:
- Custom error pages
- Detailed errors for local requests and custom error pages for remote requests
7. Click OK and exit the dialog.
Prevent IIS7 from Hijacking Your Error Pages
Sometimes IIS7 can override your custom error handling. To stop this, add the following to your web.config:
<configuration>
<system.webServer>
<httpErrors existingResponse="PassThrough" />
</system.webServer>
</configuration>This ensures that your application, rather than IIS, handles error responses.
Enable Local Detailed Errors Only
For development purposes, you might want to see detailed errors on your local machine but not remotely. Add this to your web.config:
<system.webServer>
<httpErrors errorMode="DetailedLocalOnly">
</system.webServer>This setup ensures developers can troubleshoot effectively without exposing sensitive information to users.
Additional Configurations for .NET Applications
If you are running a .NET application, two configurations are necessary to prevent interference with application-specific error handling:
1. Navigate to your site in IIS.
2. Select Error Pages, then click Edit Feature Settings. Make sure only Detailed Errors is enabled.
3. Back in the site settings, select .NET Error Pages, click Edit Feature Settings, and set the value to Off.
If these changes don’t fully resolve issues, you will at least receive more meaningful error messages that, combined with log files, help identify the root cause.
[If needed, Our team is available 24/7 for additional assistance.]
Conclusion
By following these steps, you can ensure IIS HTTP detailed errors are hidden from displaying effectively. This protects sensitive server details while still allowing local debugging. Every configuration, from setting errorMode=”DetailedLocalOnly” to adjusting .NET Error Pages, helps your site maintain security and stability.
Hiding detailed errors is a small step that delivers big security gains. Implementing it correctly will make your website safer for both users and developers.
