Lightboard Lessons: Be Ready...DNS Flag Day is Coming!
Published Jan 25, 2019
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Excellent explanation John! One Important thing: If you manage a Normal Cache Resolver DNS inside your company, is not mandatory to update your DNS to send EDNS and only accept EDNS responses. The most sensitive point is to make EDNS-compatible the Authoritative DNS, this issue is very important because starting 1 Feb several DNS resolver vendors will not accept noEDNS Authoritative DNS responses.
Regards!