Amazon CloudFront

Amazon CloudFront is one of the world's largest and most widely used content delivery networks, distributing content from over 600 points of presence across more than 90 cities globally. When you load a major website, stream a video, download a software update, or use a web application built on AWS, there's a substantial probability the bytes are coming from a CloudFront edge node rather than traveling from a central origin server. Launched in 2008 as part of the expanding AWS ecosystem, CloudFront became central infrastructure for hundreds of thousands of websites and applications.

CloudFront integrates deeply with the AWS ecosystem: S3 buckets serve as common origins for static assets, EC2 and ALB back dynamic content, Lambda@Edge and CloudFront Functions execute code at the edge for request/response manipulation, and AWS WAF can be attached to distributions for security filtering. Configuration is managed through the AWS console, CLI, SDKs, or CloudFormation/Terraform infrastructure-as-code templates. Cache behaviors define TTLs, header forwarding rules, compression settings, and origin selection logic. SSL/TLS certificate management through AWS Certificate Manager handles HTTPS termination at the edge.

CloudFront incidents are notable because their blast radius can be enormous — a significant CloudFront disruption affects not just one application but potentially thousands of websites and services simultaneously. When edge nodes in a region become unreachable or start returning errors, users in that geography see failures across many unrelated services at once, which makes the problem immediately apparent but confusing to diagnose without checking AWS status. Origin timeout errors at the CDN layer surface as 502 or 504 responses to end users. Lambda@Edge failures cause edge-computed logic to error out before requests reach origins. Cache invalidation API calls fail, meaning stale content cannot be cleared from edges during deployments.

Outage.gg monitors Amazon CloudFront's service health in real time alongside the broader AWS status dashboard. Check the live status page when widespread CDN failures are observed.