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Information on BCP 235 ยป RFC Editor

BCP 235 RFC 9210 DNS Transport over TCP - Operational Requirements, March 2022
File formats:

Status:
BEST CURRENT PRACTICE
Updates:
RFC 1123, RFC 1536
Authors:
J. Kristoff
D. Wessels
Stream:
IETF
Source:
dnsop (ops)

Cite this BCP: TXT  |  XML

Discuss this RFC: Send questions or comments to the mailing list iesg@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF  |  View History of RFC

Abstract

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.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.


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