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References

The DNS protocol is specified and built on a raft of IETF RFCs. These links serve as the canonical references for features implemented (or planned) in this repository.

Core DNS RFCs

  • RFC 1034 — Domain names: concepts and facilities; foundational DNS architecture.
  • RFC 1035 — Domain names: implementation and specification; wire format, message structures, and resource records.

Other key DNS RFCs

  • RFC 1123 — Requirements for Internet Hosts; DNS-related operational requirements.
  • RFC 2181 — Clarifications to the DNS specification; authoritative guidance for modern resolvers.
  • RFC 2308 — Negative Caching of DNS Queries; defines TTL behavior for NXDOMAIN responses (relevant to caching work).
  • RFC 3596 — DNS Extensions to Support IP Version 6; specifies AAAA records handled by this server.
  • RFC 4033 — DNS Security Introduction and Requirements; foundation for DNSSEC features.
  • RFC 4034 — Resource Records for the DNS Security Extensions; details DNSSEC record types.
  • RFC 4035 — Protocol Modifications for DNSSEC; describes resolver behavior for signed responses.

Supporting Standards & Transports

  • RFC 768 — User Datagram Protocol; the primary transport for DNS queries handled by DnsServer.
  • RFC 9293 — Transmission Control Protocol; DNS fallbacks to TCP must conform when implementing large responses or zone transfers.
  • RFC 6891 — Extension Mechanisms for DNS (EDNS(0)); governs modern DNS extensions and message size negotiation.
  • RFC 7766 — DNS Transport over TCP: Requirements; clarifies persistent TCP usage for DNS.
  • RFC 8484 — DNS Queries over HTTPS (DoH); specifies DNS resolution over HTTPS for privacy and firewall traversal.
  • RFC 9110 — HTTP Semantics; referenced by the embedded HTTP server providing health and diagnostics.