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RFC 9103
Title: DNS Zone Transfer over TLS
Author: W. Toorop,
S. Dickinson,
S. Sahib,
P. Aras,
A. Mankin
Status: Standards Track
Stream: IETF
Date: August 2021
Mailbox: [email protected],
[email protected],
[email protected],
[email protected],
[email protected]
Pages: 32
Updates: RFC 1995, RFC 5936, RFC 7766
I-D Tag: draft-ietf-dprive-xfr-over-tls-12.txt
URL: https://www.rfc-editor.org/info/rfc9103
DOI: 10.17487/RFC9103
DNS zone transfers are transmitted in cleartext, which gives
attackers the opportunity to collect the content of a zone by
eavesdropping on network connections. The DNS Transaction Signature
(TSIG) mechanism is specified to restrict direct zone transfer to
authorized clients only, but it does not add confidentiality. This
document specifies the use of TLS, rather than cleartext, to prevent
zone content collection via passive monitoring of zone transfers: XFR
over TLS (XoT). Additionally, this specification updates RFC 1995 and
RFC 5936 with respect to efficient use of TCP connections and RFC
7766 with respect to the recommended number of connections between a
client and server for each transport.
This document is a product of the DNS PRIVate Exchange Working Group of the
IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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