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CurrentBEST CURRENT PRACTICEIETF streamBCP235

RFC 9210: DNS Transport over TCP - Operational Requirements

In plain English — editorial summary, not part of the RFC

This document updates RFCs 1123 and 1536. This document requires the operational practice of permitting DNS messages to be carried over TCP on the Internet as a Best Current Practice. This operational requirement is aligned with the implementation requirements in RFC 7766. The use of TCP includes both DNS over unencrypted TCP as well as over an encrypted TLS session. The document also considers the consequences of this form of DNS communication and the potential operational issues that can arise when this Best Current Practice is not upheld.

Document record

Document ID
RFC9210
Published
March 2022
Authors
J. Kristoff; D. Wessels
Status
BEST CURRENT PRACTICE
Stream
IETF
Area
ops
Pages
29
Also known as
BCP235
Updates:
RFC 1123, RFC 1536

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/9210-dns-transport-over-tcp-operational-requirements