Minimal EDNS compliance requirements

Document Type Expired Internet-Draft (individual)
Authors Petr Špaček  , Ólafur Guðmundsson  , Ondřej Surý 
Last updated 2018-11-30 (latest revision 2018-05-29)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


DNS responders must either follow RFC 6891 by fully implementing EDNS or at least respond to queries containing OPT record according to older specifications. Non-compliant implementations which do not respond at all are not worth talking to.


Petr Špaček (
Ólafur Guðmundsson (
Ondřej Surý (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)