CloudFront 403 Request Blocked — What It Means & How to Fix It

Fix AWS CloudFront 403 Forbidden error when requests are blocked by geographic restrictions, WAF rules, or OAI/OAC misconfiguration. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: CloudFront returns 403 when a request is blocked before reaching the origin server. Possible causes include geo-restrictions, AWS WAF rules, signed URL requirements, or S3 bucket policy issues. The response includes an x-amz-cf-id header useful for troubleshooting with AWS support. CloudFront custom error pages can mask the real 403 with a friendly error page. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Geographic restriction (geo-blocking) configured on the CloudFront distribution. AWS WAF rule attached to the distribution blocking the request. S3 origin access identity (OAI) or origin access control (OAC) not configured correctly. Signed URL or signed cookies required but not present in the request. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Check CloudFront distribution's Restrictions tab for geographic blocking settings. Review AWS WAF web ACL rules associated with the distribution for matching block rules. Verify S3 bucket policy grants read access to the CloudFront OAI/OAC principal. If using signed URLs, ensure the signing key pair is valid and the URL has not expired. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our HTTP Status Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.