A new Request for Comments is now available in online RFC libraries.
RFC 9715
Title: IP Fragmentation Avoidance in DNS over UDP
Author: K. Fujiwara,
P. Vixie
Status: Informational
Stream: IETF
Date: January 2025
Mailbox: [email protected],
[email protected]
Pages: 13
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-dnsop-avoid-fragmentation-20.txt
URL: https://www.rfc-editor.org/info/rfc9715
DOI: 10.17487/RFC9715
The widely deployed Extension Mechanisms for DNS (EDNS(0)) feature in
the DNS enables a DNS receiver to indicate its received UDP message
size capacity, which supports the sending of large UDP responses by a
DNS server. Large DNS/UDP messages are more likely to be fragmented,
and IP fragmentation has exposed weaknesses in application protocols.
It is possible to avoid IP fragmentation in DNS by limiting the
response size where possible and signaling the need to upgrade from
UDP to TCP transport where necessary. This document describes
techniques to avoid IP fragmentation in DNS.
This document is a product of the Domain Name System Operations Working Group
of the IETF.
INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
this memo is unlimited.
This announcement is sent to the IETF-Announce and rfc-dist lists.
To subscribe or unsubscribe, see
https://www.ietf.org/mailman/listinfo/ietf-announce
https://mailman.rfc-editor.org/mailman/listinfo/rfc-dist
For searching the RFC series, see https://www.rfc-editor.org/search
For downloading RFCs, see https://www.rfc-editor.org/retrieve/bulk
Requests for special distribution should be addressed to either the
author of the RFC in question, or to [email protected]. Unless
specifically noted otherwise on the RFC itself, all RFCs are for
unlimited distribution.
The RFC Editor Team
_______________________________________________
rfc-dist mailing list -- [email protected]
To unsubscribe send an email to [email protected]
http://www.rfc-editor.org
