Secret Key Transaction Authentication for DNS (TSIG)
RFC 8945
Document | Type |
RFC - Internet Standard
(November 2020; No errata)
Also known as STD 93
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Authors | Francis Dupont , Stephen Morris , Paul Vixie , Donald Eastlake , Ólafur Guðmundsson , Brian Wellington | ||
Last updated | 2020-11-30 | ||
Replaces | draft-dupont-dnsop-rfc2845bis | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html xml pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Benno Overeinder | ||
Shepherd write-up | Show (last changed 2019-12-24) | ||
IESG | IESG state | RFC 8945 (Internet Standard) | |
Action Holders |
(None)
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Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Warren Kumari | ||
Send notices to | Benno Overeinder <benno@NLnetLabs.nl> | ||
IANA | IANA review state | IANA OK - Actions Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) F. Dupont Request for Comments: 8945 ISC STD: 93 S. Morris Obsoletes: 2845, 4635 Unaffiliated Category: Standards Track P. Vixie ISSN: 2070-1721 Farsight D. Eastlake 3rd Futurewei O. Gudmundsson Cloudflare B. Wellington Akamai November 2020 Secret Key Transaction Authentication for DNS (TSIG) Abstract This document describes a protocol for transaction-level authentication using shared secrets and one-way hashing. It can be used to authenticate dynamic updates to a DNS zone as coming from an approved client or to authenticate responses as coming from an approved name server. No recommendation is made here for distributing the shared secrets; it is expected that a network administrator will statically configure name servers and clients using some out-of-band mechanism. This document obsoletes RFCs 2845 and 4635. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc8945. Copyright Notice Copyright (c) 2020 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction 1.1. Background 1.2. Protocol Overview 1.3. Document History 2. Key Words 3. Assigned Numbers 4. TSIG RR Format 4.1. TSIG RR Type 4.2. TSIG Record Format 4.3. MAC Computation 4.3.1. Request MAC 4.3.2. DNS Message 4.3.3. TSIG Variables 5. Protocol Details 5.1. Generation of TSIG on Requests 5.2. Server Processing of Request 5.2.1. Key Check and Error Handling 5.2.2. MAC Check and Error Handling 5.2.3. Time Check and Error Handling 5.2.4. Truncation Check and Error Handling 5.3. Generation of TSIG on Answers 5.3.1. TSIG on TCP Connections 5.3.2. Generation of TSIG on Error Returns 5.4. Client Processing of Answer 5.4.1. Key Error Handling 5.4.2. MAC Error Handling 5.4.3. Time Error Handling 5.4.4. Truncation Error Handling 5.5. Special Considerations for Forwarding Servers 6. Algorithms and Identifiers 7. TSIG Truncation Policy 8. Shared Secrets 9. IANA Considerations 10. Security Considerations 10.1. Issue Fixed in This Document 10.2. Why Not DNSSEC? 11. References 11.1. Normative References 11.2. Informative References Acknowledgements Authors' Addresses 1. Introduction 1.1. Background The Domain Name System (DNS) ([RFC1034] [RFC1035]) is a replicatedShow full document text