I-D Action: draft-farrokhi-dnsop-ecs-opt-in-00.txt

Internet-Draft draft-farrokhi-dnsop-ecs-opt-in-00.txt is now available.

   Title:   Client Opt-In Signaling for EDNS Client Subnet
   Authors: Babak Farrokhi
            John Todd
   Name:    draft-farrokhi-dnsop-ecs-opt-in-00.txt
   Pages:   18
   Dates:   2026-08-20

Abstract:

   EDNS Client Subnet (ECS) lets a recursive resolver send part of a
   client's network address to authoritative servers, which tailor their
   answers to it.  A resolver's configuration decides whether it does
   so, for every client that sends no ECS option of its own.  RFC 7871
   lets a client opt out.  Asking instead for a shorter prefix requires
   the client to supply the address those bits are taken from, which a
   client behind a NAT or a VPN does not know.

   This document defines an opt-in.  A client includes an EDNS(0) option
   in a query to ask the resolver to forward its address information,
   and can use that option to limit how many address bits the resolver
   forwards.  A resolver implementing this document forwards nothing for
   a client that does not send the option, and one that does not
   implement it ignores the option.  One resolver address can then serve
   clients that want tailored answers and those that want their
   addresses withheld.

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-farrokhi-dnsop-ecs-opt-in/

There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-farrokhi-dnsop-ecs-opt-in-00.html

Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts


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