AWS CloudFront 502 Bad Gateway: Fix Origin TLS, DNS, and Connection Errors
Diagnose CloudFront 502 errors by checking origin DNS, certificate names, TLS chains, ports, and edge-function failures in the right order.
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CloudFront Functions vs Lambda@Edge: Choose by Event, Network Access, and Cache Behavior
Choose the right CloudFront edge runtime for redirects, URL rewrites, origin logic, and external lookups without creating cache or authentication bugs.
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