An EDNS Option to Negotiate Leases on DNS Updates
RFC 9664, “An EDNS Option to Negotiate Leases on DNS Updates”, is a Proposed Standard document published in June 2025 by S. Cheshire, T. Lemon. The canonical text is published by the RFC Editor.
Abstract
This document describes an EDNS(0) option that can be used between DNS Update Requesters and authoritative DNS servers to include a lifetime (lease duration) in a DNS Update or DNS Update Response, allowing a server to garbage collect stale Resource Records that have been added by DNS Updates if they are not renewed.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9664 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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