An EDNS0 Option for Sharing Pref64::/n
draft-boucadair-dnsop-prefix64-02
Document | Type |
Expired Internet-Draft
(individual)
Expired & archived
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Author | Mohamed Boucadair | ||
Last updated | 2022-07-09 (Latest revision 2022-01-05) | ||
RFC stream | (None) | ||
Intended RFC status | (None) | ||
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Additional resources |
GitHub Repository
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Stream | Stream state | (No stream defined) | |
Consensus boilerplate | Unknown | ||
RFC Editor Note | (None) | ||
IESG | IESG state | Expired | |
Telechat date | (None) | ||
Responsible AD | (None) | ||
Send notices to | (None) |
This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:
Abstract
This document specifies an Extension Mechanisms for DNS (EDNS0) option to convey the IPv6 prefix used to build IPv4-converted IPv6 addresses. When conveyed in a DNS query, the option communicates the IPv6 prefix used in the network from which the query was originated. Such a network is assumed to enable a Network Address and Protocol Translation from IPv6 clients to IPv4 servers (NAT64) function. DNS64-capable servers will use that prefix to build synthesized AAAA records, rather than relying on a preconfigured prefix. When conveyed in a DNS reply, the option conveys the IPv6 prefix that is used by a DNS64-capable server to synthesized AAAA records. Such information helps to automatically detect mismatches between the local NAT64 configuration and the one enforced at the DNS64 server. Also, security-aware and validating hosts may use the new EDNS0 option to signal the presence of a NAT64 function. That signal is used by the DNS server to fill the additional section of the AAAA reply in order to supply A RRs of the target. Dual queries and delays are thus avoided. This document updates RFC 6147.
Authors
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)