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IETF RFC 8767
[ACTIVE]

Serving Stale Data to Improve DNS Resiliency

Metadata

Publisher
IETF
Doc Type
Standard
Pages
12
Abstract
This document defines a method (serve-stale) for recursive resolvers to use stale DNS data to avoid outages when authoritative nameservers cannot be reached to refresh expired data. One of the motivations for serve-stale is to make the DNS more resilient to DoS attacks and thereby make them less attractive as an attack vector. This document updates the definitions of TTL from RFCs 1034 and 1035 so that data can be kept in the cache beyond the TTL expiry; it also updates RFC 2181 by interpreting values with the high-order bit set as being positive, rather than 0, and suggests a cap of 7 days.
Publication Date
2020-03-01
Status Note
Proposed Standard
DOI
10.17487/RFC8767
Link
https://doi.org/10.17487/RFC8767
Author(s)
David C Lawrence
Warren Kumari
Puneet Sood
Keyword(s)
DNS, DDoS, Resilience, DoS
Latest version of IETF RFC 8767

Document Versions — IETF RFC 8767

  • ▶ IETF RFC 8767 (2020-03-01)
    THIS DOC [ACTIVE] [LATEST VERSION]

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IETF RFC 8767, Serving Stale Data to Improve DNS Resiliency. Available at https://doi.org/10.17487/RFC8767
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IETF RFC 8767, Serving Stale Data to Improve DNS Resiliency. Available at https://doi.org/10.17487/RFC8767

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IETF RFC 8767, Serving Stale Data to Improve DNS Resiliency. Available at https://doi.org/10.17487/RFC8767
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<span class="citation"><cite>IETF RFC 8767</cite>, Serving Stale Data to Improve DNS Resiliency. Available at <a href="https://doi.org/10.17487/RFC8767" target="_blank" rel="noopener">https://doi.org/10.17487/RFC8767</a></span>

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IETF RFC 8767, Serving Stale Data to Improve DNS Resiliency
doi: 10.17487/RFC8767
url: https://doi.org/10.17487/RFC8767
Snippet:
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<cite id="bib-rfc8767">IETF RFC 8767</cite>, Serving Stale Data to Improve DNS Resiliency
<span class="doi">10.17487/RFC8767</span>
</li>

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