Cloudflare 1.1.1.1 incident on June 27, 2024This post is also available in 简体中文, 繁體中文, Français, Español, 日本語, Deutsch and 한국어. IntroductionOn 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. Cloudflare was an early adopter of Resource Public Key Infrastructure (RPKI) for route origin validation (RO
