Cloudflare 1.1.1.1 incident on June 27, 2024
Jul 4, 2024Bryton Herdes, Mingwei Zhang, Tanner Ryan
Summary
This post details a specific incident on June 27, 2024, where a BGP hijack of 1.1.1.1/32 by ELETRONET S.A. (AS267613) and a route leak of 1.1.1.0/24 by Nova Rede de Telecomunicações Ltda (AS262504) caused temporary unreachability and high latency for the 1.1.1.1 DNS resolver. It explains the technical details of BGP hijacks and route leaks, the incident timeline, and the impact on users, emphasizing Cloudflare's commitment to improving detection and advocating for RPKI adoption to prevent future occurrences.