Technical Summary
DNS filtering is widely deployed for various reasons, including
network security. However, filtered DNS responses lack structured
information for end users to understand the reason for the filtering.
Existing mechanisms to provide explanatory details to end users cause
harm especially if the blocked DNS response is for HTTPS resources.
This document updates RFC 8914 by signaling client support for
structuring the EXTRA-TEXT field of the Extended DNS Error to provide
details on the DNS filtering. Such details can be parsed by the
client and displayed, logged, or used for other purposes.
Working Group Summary
Was there anything in the WG process that is worth noting?
For example, was there controversy about particular points
or were there decisions where the consensus was
particularly rough?
Document Quality
Are there existing implementations of the protocol? Have a
significant number of vendors indicated their plan to
implement the specification? Are there any reviewers that
merit special mention as having done a thorough review,
e.g., one that resulted in important changes or a
conclusion that the document had no substantive issues? If
there was a MIB Doctor, Media Type, or other Expert Review,
what was its course (briefly)? In the case of a Media Type
Review, on what date was the request posted?
Personnel
The Document Shepherd for this document is Benno Overeinder. The
Responsible Area Director is Éric Vyncke.
IANA Note
(Insert IANA Note here or remove section)