Real-time connections are unforgiving. Unlike simple page fetches, they rely on long-lived, low-latency, stateful transport. When you place Cloudflare in front of an application that uses WebSockets, Server-Sent Events, long-polling,…

Request headers are one of the easiest places for stability to drift without anyone noticing. Your code may be identical, but different workers, proxy layers, TLS stacks, and runtime defaults…

Edge errors are the kind of incident that makes teams doubt everything at once. The origin looks healthy. Metrics are green. Yet users see intermittent failures, timeouts, or unexpected error…

“Why is the page still showing the old version?” is one of the most common Cloudflare support questions because cache problems often look like deployment problems. You update the origin,…

Redirect loops are one of the most disruptive Cloudflare-side failures because they can look like “the site is down,” while every component is technically working. The browser receives responses, the…

When traffic is blocked “for no reason,” the fastest way out is rarely guesswork in code. It is the firewall event trail. Cloudflare’s firewall decisions leave a footprint: which rule…

A 429 response is one of the few rate-limit signals that looks explicit, but in Cloudflare-protected environments it still rarely tells the full story. Many teams see 429s in bursts,…

IP reputation blocks are one of the most confusing Cloudflare failure modes because they can look unrelated to your application logic. Your requests are well-formed, TLS completes, and sometimes everything…