Browse Prior Art Database

Initializing a DNS Resolver with Priming Queries (RFC8109)

IP.com Disclosure Number: IPCOM000249672D
Original Publication Date: 2017-Mar-01
Included in the Prior Art Database: 2017-Mar-16
Document File: 14 page(s) / 16K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P. Koch: AUTHOR [+3]

Abstract

Recursive DNS resolvers need a starting point to resolve queries. [RFC1034] describes a common scenario for recursive resolvers: they begin with an empty cache and some configuration for finding the names and addresses of the DNS root servers. [RFC1034] describes that configuration as a list of servers that will give authoritative answers to queries about the root. This has become a common implementation choice for recursive resolvers, and is the topic of this document.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 18% of the total text.

Internet Engineering Task Force (IETF)                           P. Koch Request for Comments: 8109                                      DENIC eG BCP: 209                                                       M. Larson Category: Best Current Practice                               P. Hoffman ISSN: 2070-1721                                                    ICANN                                                               March 2017

             Initializing a DNS Resolver with Priming Queries

Abstract

   This document describes the queries that a DNS resolver should emit    to initialize its cache.  The result is that the resolver gets both a    current NS Resource Record Set (RRset) for the root zone and the    necessary address information for reaching the root servers.

Status of This Memo

   This memo documents an Internet Best Current Practice.

   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    BCPs 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    http://www.rfc-editor.org/info/rfc8109.

Copyright Notice

   Copyright (c) 2017 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    (http://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.

 Koch et al.               Best Current Practice                 [Page 1]
 RFC 8109                   DNS Priming Queries                March 2017

 Table of Contents

   1. Introduction ....................................................2

   2. Description of Priming ..........................................3

   3. Priming Queries .................................................3

      3.1. Repeating Priming Queries ..................................4

      3.2. Target Selection ..................................