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| | Delegation Revalidation by DNS Resolvers |
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This document describes an optional algorithm for the processing of Name Server (NS) resource record (RR) sets (RRsets) during iterative resolution, and describes the benefits and considerations of using this approach. When following a referral response from an authoritative server to a child zone, DNS resolvers should explicitly query the authoritative NS RRset at the apex of the child zone and cache this in preference to the NS RRset on the parent side of the zone cut. The (A and AAAA) address RRsets in the additional section from referral responses and authoritative NS answers for the names of the NS RRset, should similarly be re-queried and used to replace the entries with the lower trustworthiness ranking in cache. Resolvers should also periodically revalidate the delegation by re-querying the parent zone at the expiration of the TTL of either the parent or child NS RRset, whichever comes first. |
| | Domain Control Validation using DNS |
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Many application services on the Internet need to verify ownership or control of a domain in the Domain Name System (DNS). The general term for this process is "Domain Control Validation", and can be done using a variety of methods such as email, HTTP/HTTPS, or the DNS itself. This document focuses only on DNS-based methods, which typically involve the Application Service Provider requesting a DNS record with a specific format and content to be visible in the domain to be verified. There is wide variation in the details of these methods today. This document provides some best practices to avoid known problems. |
| | Structured Error Data for Filtered DNS |
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DNS filtering is widely deployed for various reasons, including network security. However, filtered DNS responses lack structured information for end users to understand the reason for the filtering. Existing mechanisms to provide explanatory details to end users cause harm especially if the blocked DNS response is for HTTPS resources. This document updates RFC 8914 by signaling client support for structuring the EXTRA-TEXT field of the Extended DNS Error to provide details on the DNS filtering. Such details can be parsed by the client and displayed, logged, or used for other purposes. |
| | Compact Denial of Existence in DNSSEC |
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This document describes a technique to generate a signed DNS response on demand for a non-existent name by claiming that the name exists but doesn't have any data for the queried record type. Such answers require only one minimally covering NSEC or NSEC3 record, allow online signing servers to minimize signing operations and response sizes, and prevent zone content disclosure. This document updates RFC 4034 and 4035. |
| | Clarifications on CDS/CDNSKEY and CSYNC Consistency |
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Maintenance of DNS delegations requires occasional changes of the DS and NS record sets on the parent side of the delegation. For the case of DS records, RFC 7344 provides automation by allowing the child to publish CDS and/or CDNSKEY records holding the prospective DS parameters which the parent can ingest. Similarly, RFC 7477 specifies CSYNC records to indicate a desired update of the delegation's NS (and glue) records. Parent-side entities (e.g. Registries, Registrars) can query these records from the child and, after validation, use them to update the parent-side RRsets of the delegation. This document specifies that when performing such queries, parent- side entities MUST ensure that updates triggered via CDS/CDNSKEY and CSYNC records are consistent across the child's authoritative nameservers, before taking any action based on these records. |
| | Generalized DNS Notifications |
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This document generalizes and extends the use of DNS NOTIFY (RFC 1996) beyond conventional zone transfer hints, to allow triggering other types of actions via the DNS that were previously lacking a trigger mechanism. Notifications merely nudge the receiver to initiate a predefined action promptly (instead of on a schedule); they do not alter the action itself (including any security checks it might employ). To enable this functionality, a method for discovering the receiver endpoint for such notification messages is introduced, via the new DSYNC record type. Notification types are recorded in a new registry, with initial support for parental NS and DS record updates including DNSSEC bootstrapping. TO BE REMOVED: This document is being collaborated on in Github at: https://github.com/peterthomassen/draft-ietf-dnsop-generalized-notify (https://github.com/peterthomassen/draft-ietf-dnsop-generalized- notify). The most recent working version of the document, open issues, etc. should all be available there. The authors (gratefully) accept pull requests. |
| | Deprecate usage of ECC-GOST within DNSSEC |
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This document retires the use of GOST R 34.10-2001 (mnemonic "ECC- GOST") within DNSSEC. RFC5933 (now historic) defined the use of GOST R 34.10-2001 and GOST R 34.11-94 algorithms with DNS Security Extensions (DNSSEC). This document updates RFC5933 by deprecating the use of ECC-GOST. |
| | DNSSEC Cryptographic Algorithm Recommendation Update Process |
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The DNSSEC protocol makes use of various cryptographic algorithms to provide authentication of DNS data and proof of non-existence. To ensure interoperability between DNS resolvers and DNS authoritative servers, it is necessary to specify both a set of algorithm implementation requirements and usage guidelines to ensure that there is at least one algorithm that all implementations support. This document replaces and obsoletes RFC8624 and moves the canonical source of algorithm implementation requirements and usage guidance for DNSSEC from RFC8624 to an IANA registry. This is done both to allow the list of requirements to be more easily updated, and to allow the list to be more easily referenced. Future extensions to this registry can be made under new, incremental update RFCs. This document also incorporates the revised IANA DNSSEC considerations from RFC9157. The document does not change the status (MUST, MAY, RECOMMENDED, etc.) of the algorithms listed in RFC8624; that is the work of future documents. |
| | Deprecating the use of SHA-1 in DNSSEC signature algorithms |
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This document deprecates the use of the RSASHA1 and RSASHA1-NSEC3-SHA1 algorithms for the creation of DNS Public Key (DNSKEY) and Resource Record Signature (RRSIG) records. It updates RFC4034 and RFC5155 as it deprecates the use of these algorithms. |
| | DNS IPv6 Transport Operational Guidelines |
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This memo provides guidelines and documents Best Current Practice for operating authoritative DNS servers as well as recursive and stub DNS resolvers, given that queries and responses are carried in a mixed environment of IPv4 and IPv6 networks. This document expands on RFC 3901 by recommending that authoritative DNS servers as well as recursive DNS resolvers support both IPv4 and IPv6. It furthermore provides guidance for how recursive DNS resolver should select upstream DNS servers, if synthesized and non-synthesized IPv6 addresses are available. This document obsoletes RFC3901. (if approved) |
| | Integration of DNS Domain Names into Application Environments: Motivations and Considerations |
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This document reviews the motivations and considerations for integrating DNS domain names into an application environment and provides terminology to establish a shared understanding of what a DNS integration may entail. |
| | Operational Recommendations for DS Automation |
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Enabling support for automatic acceptance of DS parameters from the Child DNS operator (via RFCs 7344, 8078, 9615) requires the parent operator, often a registry or registrar, to make a number of technical decisions. This document describes recommendations for new deployments of such DS automation. |