draft-ietf-dnsop-7706bis-09.txt   draft-ietf-dnsop-7706bis-10.txt 
Network Working Group W. Kumari Network Working Group W. Kumari
Internet-Draft Google Internet-Draft Google
Obsoletes: 7706 (if approved) P. Hoffman Obsoletes: 7706 (if approved) P. Hoffman
Intended status: Informational ICANN Intended status: Informational ICANN
Expires: September 3, 2020 March 2, 2020 Expires: September 6, 2020 March 5, 2020
Running a Root Server Local to a Resolver Running a Root Server Local to a Resolver
draft-ietf-dnsop-7706bis-09 draft-ietf-dnsop-7706bis-10
Abstract Abstract
Some DNS recursive resolvers have longer-than-desired round-trip Some DNS recursive resolvers have longer-than-desired round-trip
times to the closest DNS root server; those resolvers may have times to the closest DNS root server; those resolvers may have
difficulty getting responses from the root servers, such as during a difficulty getting responses from the root servers, such as during a
network attack. Some DNS recursive resolver operators want to network attack. Some DNS recursive resolver operators want to
prevent snooping by third parties of requests sent to DNS root prevent snooping by third parties of requests sent to DNS root
servers. Such resolvers can greatly decrease the round-trip time and servers. Such resolvers can greatly decrease the round-trip time and
prevent observation of requests by serving a copy of the full root prevent observation of requests by serving a copy of the full root
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
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Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 3, 2020. This Internet-Draft will expire on September 6, 2020.
Copyright Notice Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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[RFC8198] Fujiwara, K., Kato, A., and W. Kumari, "Aggressive Use of [RFC8198] Fujiwara, K., Kato, A., and W. Kumari, "Aggressive Use of
DNSSEC-Validated Cache", RFC 8198, DOI 10.17487/RFC8198, DNSSEC-Validated Cache", RFC 8198, DOI 10.17487/RFC8198,
July 2017, <https://www.rfc-editor.org/info/rfc8198>. July 2017, <https://www.rfc-editor.org/info/rfc8198>.
Appendix A. Current Sources of the Root Zone Appendix A. Current Sources of the Root Zone
The root zone can be retrieved from anywhere as long as it comes with The root zone can be retrieved from anywhere as long as it comes with
all the DNSSEC records needed for validation. Currently, one can get all the DNSSEC records needed for validation. Currently, one can get
the root zone from ICANN by zone transfer (AXFR) [RFC5936] over TCP the root zone from ICANN by zone transfer (AXFR) [RFC5936] over TCP
from DNS servers at xfr.lax.dns.icann.org and xfr.cjr.dns.icann.org. from DNS servers at xfr.lax.dns.icann.org and xfr.cjr.dns.icann.org.
One can also get the root zone from IANA as a text file over HTTPS at The root zone file can be obtained using methods described at
<https://www.internic.net/domain/root.zone>. <https://www.iana.org/domains/root/files>.
Currently, the root can also be retrieved by AXFR over TCP from the Currently, the root can also be retrieved by AXFR over TCP from the
following root server operators: following root server operators:
o b.root-servers.net o b.root-servers.net
o c.root-servers.net o c.root-servers.net
o d.root-servers.net o d.root-servers.net
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