Cloudflare incident on August 21, 2025
2025-08-22
On August 21, 2025, an influx of traffic directed toward clients hosted in AWS us-east-1 caused severe congestion on links between Cloudflare and us-east-1. In this post, we explain the details....
QUIC action: patching a broadcast address amplification vulnerability
2025-02-10
Cloudflare was recently contacted by researchers who discovered a broadcast amplification vulnerability through their QUIC Internet measurement research. We've implemented a mitigation....
Cloudflare’s perspective of the October 30, 2024, OVHcloud outage
2024-10-30
On October 30, 2024, cloud hosting provider OVHcloud (AS16276) suffered a brief but significant outage. Within this post, we review Cloudflare’s perspective on this outage....
The backbone behind Cloudflare’s Connectivity Cloud
2024-08-06
Connectivity CloudAnycastArgo Smart RoutingAthenian ProjectBGPBetter InternetCloudflare NetworkMagic TransitProduct News
Read through the latest milestones and expansions of Cloudflare's global backbone and how it supports our Connectivity Cloud and our services...
Cloudflare 1.1.1.1 incident on June 27, 2024
2024-07-04
On June 27, 2024, a small number of users globally may have noticed that 1.1.1.1 was unreachable or degraded. The root cause was a mix of BGP (Border Gateway Protocol) hijacking and a route leak...
