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BCP 235
RFC 9210
Title: DNS Transport over TCP -
Operational Requirements
Author: J. Kristoff,
D. Wessels
Status: Best Current Practice
Stream: IETF
Date: March 2022
Mailbox: [email protected],
[email protected]
Pages: 29
Updates: RFC 1123, RFC 1536
See Also: BCP 235
I-D Tag: draft-ietf-dnsop-dns-tcp-requirements-15.txt
URL: https://www.rfc-editor.org/info/rfc9210
DOI: 10.17487/RFC9210
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.
This document is a product of the Domain Name System Operations Working Group
of the IETF.
BCP: This document specifies an Internet Best Current Practices for the
Internet Community, and requests discussion and suggestions for
improvements. Distribution of this memo is unlimited.
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