PowerDNS

Den Haag Netherlands peter.van.dijk@powerdns.com

ISC

Brno Czech Republic pspacek@isc.org

ICANN

St Peter Port Guernsey roy.arends@icann.org

General deleg Internet-Draft This document proposes modifications to the Domain Name System (DNS) protocol to support a range of authoritative resource record types at delegation points. Currently, the DNS only allows DS (Delegation Signer) records at a delegation point as authoritative data. This draft extends that model by enabling the inclusion of a range of RRtypes at delegation points. The proposed modifications preserve compatibility with existing DNS resolution behavior while providing a clear framework for identifying and processing these records as authoritative data at delegation points.

Introduction defines the DS (Delegation Signer) resource record as having a unique property: it resides solely at a delegation as authoritative data. Discussions and drafts within the DPRIVE, DNSOP, and DELEG working groups have highlighted interest in allowing additional types of data to be published at delegation points. Some proposals have introduced new RRtypes with the assumption that authoritative servers and registry systems would eventually support them. Others have attempted to repurpose the DS record format for unrelated data. Had a range of RRtypes been designated early on to behave similarly to DS, these proposals and their associated protocols could have been more easily developed and evaluated. This document proposes reserving such a range of RRtype codes and defines the expected behavior of DNS implementations that support them. This document requests that IANA reserve such a range and defines behavior of DNS implementations.

Conventions and Definitions The term "Authoritative Delegation Types" refers to set of RR types which contains exactly:

• Value 43 as defined for DS type by ,
• The range reserved by this document in .

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 when, and only when, they appear in all capitals, as shown here.

Relationship with the DELEG draft The DELEG draft specifies one new resource record type (DELEG) that is authoritative at a delegation point and proposes protocol modifications to support DELEG. The sole purpose of this document is to make sure that the protocol modifications are generic for a range of types instead of just DELEG. If the WG decides to seperate the DELEG type specification from the Protocol Modifications needed to support authoritative delegation types, we can incorporate all the necessary parts in this document.

Security Considerations To be added.

IANA Considerations IANA is requested to change reservations in the DNS Parameters RR TYPEs registry, with this document as the Reference.

• Range 0xFA00-0xFDFF to Registration Procedure "Expert Review or Standards Action"
• Range 0xFE00-0xFEFF to Registration Procedure "Private Use"

Acknowledgements This idea was initially proposed by Petr Spacek.

References Normative References Informative References