A BGP route hijack of Cloudflare's 1.1.1.0/24 prefix disrupted the 1.1.1.1 public DNS resolver for users in Canada for approximately 1.1 hours. Cloudflare identified the offending network responsible for the route leak and contacted them directly to remediate the issue. The affected network resolved the route leak on their end, restoring normal service, while 1.0.0.1 and IPv6 resolver prefixes remained unaffected throughout the incident.
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The network with the offending route leak has fixed the issue on their end. We are currently monitoring the effect of this fix.
We have reached out to the network where we see an active hijack of 1.1.1.0/24.
1.0.0.1 and public resolver IPv6 prefixes are fully operational and reachable at this time.
Cloudflare is aware of, and investigating, an issue which potentially impacts multiple users in Canada that use 1.1.1.1 public resolver.
Further detail will be provided as more information becomes available.
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