CDN
3 posts tagged with CDN.
How CDN, DNS, and cloud outages affect apps you use every day
Apps you use daily share fewer pieces of infrastructure than you'd think. When one of those pieces fails — a single CDN, a single DNS provider, a single AWS region — half the internet seems to break at once. Here's why, with the canonical examples and what you can do about it.
May 13, 2026·16 min
Why a website can be down in one country but working everywhere else
The same URL can return 200 OK in Frankfurt and time out in Mumbai. Four mechanisms explain almost every regional outage — GeoDNS, CDN POP failures, BGP routing problems, and government-level filtering. Here's how to tell which one is in play.
May 13, 2026·15 min
Cloudflare error codes: 520, 521, 522, 524, 1015, 1020 decoded
Cloudflare error pages own their own numeric range — 5xx for upstream problems, 1xxx for client-side policy hits. Each code points at a specific failure in a specific place. Here's the field guide.
May 12, 2026·7 min