rfc9664v4.txt   rfc9664.txt 
Internet Engineering Task Force (IETF) S. Cheshire Internet Engineering Task Force (IETF) S. Cheshire
Request for Comments: 9664 T. Lemon Request for Comments: 9664 T. Lemon
Category: Standards Track Apple Inc. Category: Standards Track Apple Inc.
ISSN: 2070-1721 May 2025 ISSN: 2070-1721 June 2025
An EDNS(0) Option to Negotiate Leases on DNS Updates An EDNS(0) Option to Negotiate Leases on DNS Updates
Abstract Abstract
This document describes an EDNS(0) option that can be used between This document describes an EDNS(0) option that can be used between
DNS Update Requesters and authoritative DNS servers to include a DNS Update Requesters and authoritative DNS servers to include a
lifetime (lease duration) in a DNS Update or DNS Update Response, lifetime (lease duration) in a DNS Update or DNS Update Response,
allowing a server to garbage collect stale Resource Records that have allowing a server to garbage collect stale Resource Records that have
been added by DNS Updates if they are not renewed. been added by DNS Updates if they are not renewed.
skipping to change at line 558 skipping to change at line 558
March 2017, <https://www.rfc-editor.org/info/rfc8085>. March 2017, <https://www.rfc-editor.org/info/rfc8085>.
[RFC8945] Dupont, F., Morris, S., Vixie, P., Eastlake 3rd, D., [RFC8945] Dupont, F., Morris, S., Vixie, P., Eastlake 3rd, D.,
Gudmundsson, O., and B. Wellington, "Secret Key Gudmundsson, O., and B. Wellington, "Secret Key
Transaction Authentication for DNS (TSIG)", STD 93, Transaction Authentication for DNS (TSIG)", STD 93,
RFC 8945, DOI 10.17487/RFC8945, November 2020, RFC 8945, DOI 10.17487/RFC8945, November 2020,
<https://www.rfc-editor.org/info/rfc8945>. <https://www.rfc-editor.org/info/rfc8945>.
[RFC9665] Lemon, T. and S. Cheshire, "Service Registration Protocol [RFC9665] Lemon, T. and S. Cheshire, "Service Registration Protocol
for DNS-Based Service Discovery", RFC 9665, for DNS-Based Service Discovery", RFC 9665,
DOI 10.17487/RFC9665, October 2024, DOI 10.17487/RFC9665, June 2025,
<https://www.rfc-editor.org/info/rfc9665>. <https://www.rfc-editor.org/info/rfc9665>.
[EDNS0Reg] IANA, "DNS EDNS0 Option Codes (OPT)", [EDNS0Reg] IANA, "DNS EDNS0 Option Codes (OPT)",
<https://www.iana.org/assignments/dns-parameters>. <https://www.iana.org/assignments/dns-parameters>.
[SYN] Eddy, W., "Defenses Against TCP SYN Flooding Attacks", The [SYN] Eddy, W., "Defenses Against TCP SYN Flooding Attacks", The
Internet Protocol Journal, Cisco Systems, Volume 9, Number Internet Protocol Journal, Cisco Systems, Volume 9, Number
4, December 2006, 4, December 2006,
<https://www.cisco.com/web/about/ac123/ac147/ <https://www.cisco.com/web/about/ac123/ac147/
archived_issues/ipj_9-4/ipj_9-4.pdf>. archived_issues/ipj_9-4/ipj_9-4.pdf>.
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