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Adding CloudFront to S3

Adding CloudFront to S3

We dive deeper into why plain s3 buckets are not enough and how CloudFront comes into the picture.

Adding CloudFront to Amazon S3: Why Plain HTTP Buckets Aren't Enough

In my previous post, we looked at configuring Amazon S3 for static website hosting. While that gets your portfolio live quickly, hosting directly from an S3 website endpoint has two major limitations: it only supports plain HTTP, and your storage bucket remains exposed.
Here is why adding Amazon CloudFront is the gold standard for static frontend hosting, and how it protects your bucket.

The Limitations of Direct S3 Hosting

  1. No Native HTTPS for Custom Domains: S3 website endpoints do not support custom SSL/TLS certificates directly on the bucket.
  2. Public Bucket Exposure: To serve files directly from an S3 website endpoint, your bucket policy must allow global read permissions.
  3. Latency for Global Visitors: Assets are served exclusively from the AWS region where your bucket resides.

How CloudFront Solves This

When you place an Amazon CloudFront distribution in front of S3:
  • Origin Access Control (OAC): CloudFront can access your bucket securely while keeping the S3 bucket itself completely private from the public internet.
  • Global Caching: Content is cached at AWS Edge Locations worldwide, drastically reducing load times.
  • Free SSL/TLS: You can attach a custom domain with a free certificate from AWS Certificate Manager (ACM).

3 Quick Steps to Set It Up

  1. Keep Your S3 Bucket Private: Enable Block all public access on your S3 bucket.
  2. Create a CloudFront Distribution: Set the S3 bucket origin domain and enable Origin Access Control (OAC).
  3. Update S3 Bucket Policy: Copy the auto-generated policy from CloudFront into your S3 permissions tab so only the distribution can read the files.

Summary

Moving from direct S3 hosting to CloudFront takes under ten minutes, but it completely changes your site's security posture and performance.
Are you using CloudFront mainly for CDN caching, or strictly for SSL and origin protection? Let me know below!
# amazon-cloudfront# amazon-s3# storage
Any opinions in this article are those of the individual author and may not reflect the opinions of AWS.
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