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 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
Monitor CDN edge availability, cache behavior, origin health, TLS, DNS, WAF rules, and regional performance across major providers.
Cloudflare Monitoring: How to Detect Origin Outages Behind a CDN
Monitor Cloudflare edge delivery and protected origin-dependent paths separately so cache hits do not hide API, TLS, WAF, or backend failures.
Multi-Region Monitoring: Why Checking From One Location Isn't Enough
Choose probe locations from user traffic, routing, dependencies, and failover design; distinguish regional faults from probe failures with quorum logic.