Incidentsby Glyph1.1.1.1 public DNS resolver unreachable for 62 minutes
Jul 14, 21:52 UTCJul 14, 22:54 UTC
Duration
1h 2m
Impact
Critical
Root cause
Config change
Cloudflare, 90 days
187 incidents
Affected
1.1.1.1 ResolverGateway DNSGlobal
Lesson: Latent config errors can sit for weeks; progressive deployment and legacy-system cleanup matter as much as the change that finally triggers them.
What happened
A service topology configuration error, introduced weeks earlier with no impact, was triggered by a later change and withdrew the 1.1.1.1 prefixes from Cloudflare data centers. Not an attack or a BGP hijack.