Network Working Group M. Andrews
Internet-Draft ISC
Expires: April 30, 2015 October 27, 2014

Add 100.64.0.0/10 prefixes to IPv4 Locally-Served DNS Zones Registry.
draft-ietf-dnsop-rfc6598-rfc6303-02

Abstract

RFC6598 specified that: "Reverse DNS queries for Shared Address Space addresses [100.64.0.0/10] MUST NOT be forwarded to the global DNS infrastructure."

This document formally directs IANA to add the associated zones to the "IPv4 Locally-Served DNS Zones Registry" to prevent such queries accidently leaking to the global DNS infrastructure.

Status of This Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

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This Internet-Draft will expire on April 30, 2015.

Copyright Notice

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Table of Contents

1. Introduction

[RFC6598] specified that: "Reverse DNS queries for Shared Address Space addresses [100.64.0.0/10] MUST NOT be forwarded to the global DNS infrastructure." [RFC6303] provides guidance on handling such queries.

This document directs the IANA to add the IPv4 reverse zones corresponding to 100.64.0.0/10, a netblock reserved in [RFC6598], to the IPv4 Locally-Served DNS Zone Registry established in [RFC6303].

Unlike [RFC1918] address, which are not expected to be seen by other parties, the addresses from [RFC6598] are expected to be seen by parties other than those deploying the addresses, so it is more crucial that recursive nameservers default to serving these zones locally.

2. Changes to IPv4 Locally-Served DNS Zones Registry

To add the following zone listed in RFC6598 Zones [rfc6598zones] to the "IPv4 Locally-Served DNS Zone Registry".

2.1. RFC6598 Zones

3. IANA Considerations

This document directs IANA to add the zones listed in RFC6598 Zones [rfc6598zones] to the "IPv4 Locally-Served DNS Zone Registry".

IANA is reminded that a insecure delegation for these zones is required for compliance with [RFC6598] to break the DNSSEC chain of trust.

4. Security Considerations

This document is thought to present no additional security risks to the Internet.

5. Acknowledgements

I would like to thank Joe Abley for his review comments.

6. Normative References

[RFC1918] Rekhter, Y., Moskowitz, R., Karrenberg, D., Groot, G. and E. Lear, "Address Allocation for Private Internets", BCP 5, RFC 1918, February 1996.
[RFC6303] Andrews, M., "Locally Served DNS Zones", BCP 163, RFC 6303, July 2011.
[RFC6598] Weil, J., Kuarsingh, V., Donley, C., Liljenstolpe, C. and M. Azinger, "IANA-Reserved IPv4 Prefix for Shared Address Space", BCP 153, RFC 6598, April 2012.

Author's Address

M. Andrews Internet Systems Consortium 950 Charter Street Redwood City, CA 94063 US EMail: marka@isc.org