A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Domain Name System Operations WG of the IETF.
Title : Serving Stale Data to Improve DNS Resiliency
Authors : David C Lawrence
Warren "Ace" Kumari
Puneet Sood
Filename : draft-ietf-dnsop-serve-stale-04.txt
Pages : 12
Date : 2019-03-09
Abstract:
This draft 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. It updates the definition
of TTL from [RFC1034], [RFC1035], and [RFC2181] to make it clear that
data can be kept in the cache beyond the TTL expiry and used for
responses when a refreshed answer is not readily available. 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.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dnsop-serve-stale/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dnsop-serve-stale-04
https://datatracker.ietf.org/doc/html/draft-ietf-dnsop-serve-stale-04
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dnsop-serve-stale-04
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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