Return Routability Check for DTLS 1.2 and 1.3

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Publisher: IETF
Doc Type: Standard
Pages: 22
Abstract: This document specifies a Return Routability Check (RRC) subprotocol for use in the context of the Connection ID (CID) construct for the Datagram Transport Layer Security (DTLS) protocol versions 1.2 and 1.3. Implementations offering the CID functionality described in RFCs 9146 and 9147 are encouraged to also provide the RRC functionality described in this document. For this reason, this document updates RFCs 9146 and 9147.
Publication Date: 2026-03-01
Status Note: Proposed Standard
DOI: 10.17487/RFC9853
Link: https://doi.org/10.17487/RFC9853
Author(s): Hannes Tschofenig
Achim Kraus
Thomas Fossati
Keyword(s): DTLS

Latest version of IETF RFC 9853

Document Versions — IETF RFC 9853

▶ IETF RFC 9853 (2026-03-01)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

IANA, "Transport Layer Security (TLS) Parameters", <https://www.iana.org/assignments/tls-parameters>. EXTERNAL
IETF RFC 2119 [Active*]
IETF RFC 6347 [Superseded*]
IETF RFC 8126 [Active*]
IETF RFC 8174 [Active*]
IETF RFC 8446 [Superseded*]
IETF RFC 8447 [Active*]
IETF RFC 9146 [Active*]
IETF RFC 9147 [Active*]
IETF RFC 9847 [Active*]

Bibliographic Reference(s)

IETF.draft-ietf-uta-tls13-iot-profile-19 — I-D.ietf-uta-tls13-iot-profile EXTERNAL
IETF.draft-irtf-t2trg-amplification-attacks-05 — I-D.irtf-t2trg-amplification-attacks EXTERNAL
IETF RFC 4086 [Active*]
IETF RFC 9000 [Active*]
IETF RFC 9175 [Active*]

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IETF RFC 9853, Return Routability Check for DTLS 1.2 and 1.3. Available at https://doi.org/10.17487/RFC9853

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IETF RFC 9853, Return Routability Check for DTLS 1.2 and 1.3. Available at https://doi.org/10.17487/RFC9853

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IETF RFC 9853, Return Routability Check for DTLS 1.2 and 1.3. Available at https://doi.org/10.17487/RFC9853

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<span class="citation"><cite>IETF RFC 9853</cite>, Return Routability Check for DTLS 1.2 and 1.3. Available at <a href="https://doi.org/10.17487/RFC9853" target="_blank" rel="noopener">https://doi.org/10.17487/RFC9853</a></span>

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IETF RFC 9853, Return Routability Check for DTLS 1.2 and 1.3
doi: 10.17487/RFC9853
url: https://doi.org/10.17487/RFC9853

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<li>
<cite id="bib-rfc9853">IETF RFC 9853</cite>, Return Routability Check for DTLS 1.2 and 1.3
<span class="doi">10.17487/RFC9853</span>
</li>