Cloudflare 520–526 Errors Explained: Causes and Fixes
What Cloudflare's 520, 521, 522, 523, 524, 525, and 526 errors mean, why they happen between Cloudflare and your origin, and how to diagnose and fix each one.
HTTP/3 & QUIC Monitoring: What Changes and What to Watch
How HTTP/3 and QUIC change monitoring: UDP 443, 0-RTT, connection migration, fallback to HTTP/2, and the new failure modes and metrics you must watch.
CDN Monitoring: Catch Edge, Cache, and Origin Failures
Your CDN is your frontline. Learn how to monitor edge nodes, cache hit rates, origin health, and TLS across CloudFront, Fastly, and Cloudflare.
Cloudflare Monitoring: How to Detect Origin Outages Behind a CDN
Your CDN can mask partial failures. Learn how to monitor Cloudflare-routed websites and detect origin outages before customers report them.
Multi-Region Monitoring: Why Checking From One Location Isn't Enough
Why multi-region monitoring is essential. Learn how testing from different global locations uncovers regional outages, DNS issues, and latency problems.