Extended DNS Error
AssessTechniques
An EDNS0 mechanism for returning more specific diagnostic information with DNS responses.
Why it's here
Placed in Assess: 1 article(s) of evidence from 1 source(s), led by security coverage, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.
Evidence (1)
- 8Cloudflare Blog·7/14/2026securityCloudflare adds DNSSEC bypass warnings for .AL outage
A failed DNSSEC key rollover in Albania’s .AL TLD caused validation errors across the zone, making many domains unreachable for users on validating resolvers such as Cloudflare 1.1.1.1. Cloudflare applied a Negative Trust Anchor to restore resolution and, for the first time, returned an Extended DNS Error code to indicate that responses were served without DNSSEC validation.