Recommendations for Authoritative Servers Operators
draft-moura-dnsop-authoritative-recommendations-00

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DNSOP Working Group                                             G. Moura
Internet-Draft                                        SIDN Labs/TU Delft
Intended status: Informational                               W. Hardaker
Expires: June 1, 2019                                       J. Heidemann
                                      USC/Information Sciences Institute
                                                               M. Davids
                                                               SIDN Labs
                                                       November 28, 2018

          Recommendations for Authoritative Servers Operators
           draft-moura-dnsop-authoritative-recommendations-00

Abstract

   This document summarizes recent research work exploring DNS
   configurations and offers specific, tangible recommendations to
   operators for configuring authoritative servers.

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on June 1, 2019.

Copyright Notice

   Copyright (c) 2018 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

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   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  R1: All authoritative server should have similar latency  . .   4
   3.  R2: Routing Can Matter More Than Locations  . . . . . . . . .   5
   4.  R3: Collecting Detailed Anycast Catchment Maps Ahead of
       Actual Deployment Can Improve Engineering Designs . . . . . .   6
   5.  R4: When under stress, employ two strategies  . . . . . . . .   7
   6.  R5: Be careful on how to choose your records time-to-live
       values  . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
   7.  R6: Shared Infrastructure Risks Collateral Damage During
       Attacks . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   8.  Security considerations . . . . . . . . . . . . . . . . . . .  11
   9.  IANA considerations . . . . . . . . . . . . . . . . . . . . .  11
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     11.2.  Informative References . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   The domain name system (DNS) has main two types of DNS servers:
   authoritative servers and recursive resolvers.  Figure 1 shows their
   relationship.  An authoritative server knows the content of a DNS
   zone from local knowledge, and thus can answer queries about that
   zone needing to query other servers [RFC2181].  A recursive resolver
   is a program that extracts information from name servers in response
   to client requests [RFC1034].  A client, in Figure 1, is shown as
   stub, which is shorthand for stub resolver [RFC1034] that is
   typically located within the client software.

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               +-----+   +-----+   +-----+   +-----+
               | AT1 |   | AT2 |   | AT3 |   | AT4 |
               +--+--+   +--+--+   +---+-+   +--+--+
                  ^         ^          ^        ^
                  |         |          |        |
                  |      +--+--+       |        |
                  +------+ Rn  +-------+        |
                  |      +--^--+                |
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