CloudFront viewer request issues.

10/09/2023

Amazon CloudFront is a content delivery network (CDN) service provided by AWS. If you're experiencing issues with viewer requests in CloudFront, here are some common problems and troubleshooting steps:

  1. Access Denied (403 Forbidden):
    • Check the permissions on your CloudFront distribution. Ensure that the user or role making the request has the necessary permissions to access the content.
  2. Invalid URL or Resource Path:
    • Verify that the URL or resource path being requested is correct. Double-check for any typos or incorrect paths.
  3. CORS (Cross-Origin Resource Sharing) Errors:
    • If you're loading resources from different domains, ensure that CORS is configured correctly on your server. Check the response headers for the correct CORS headers.
  4. Cache Issues:
    • If you're seeing outdated content, check the caching settings in your CloudFront distribution. You might need to adjust the cache behavior settings.
  5. SSL Certificate Issues:
    • If you're using HTTPS, make sure your SSL certificate is valid and correctly configured in your CloudFront distribution.
  6. Origin Server Issues:
    • Confirm that your origin server (the server where your content is hosted) is accessible and working properly.
  7. Distribution Settings:
    • Review the settings in your CloudFront distribution. Pay close attention to behaviors, origins, and cache settings to ensure they're configured correctly.
  8. Access Logs:
    • Check the CloudFront access logs for any error codes or patterns that might provide insights into the issue.
  9. Whitelist IP Addresses:
    • If you've implemented IP whitelisting, ensure that the requester's IP address is correctly added to the whitelist.
  10. Lambda@Edge Issues:
    • If you're using Lambda@Edge functions, review your function code for any errors or misconfigurations.
  11. CloudFront Web ACLs:
    • If you're using AWS Web Application Firewall (WAF), review your Web ACL settings to ensure they're not blocking legitimate requests.
  12. Review CloudFront Documentation and Forums:
    • AWS provides extensive documentation and community forums. Reviewing these resources might provide insights or specific troubleshooting steps for the issues you're facing.
  13. Contact AWS Support:
    • If the issue persists and you've tried the troubleshooting steps, consider contacting AWS Support for specialized assistance.

Remember that the specific issues with your CloudFront viewer requests can vary depending on your specific configuration and content. Providing more detailed information about the specific problem you're encountering would allow for more targeted advice.

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