SWILD RR Type (Wildcard on Intermediate Nameservers)
draft-pan-dnsop-swild-rr-type-01

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Last updated 2017-09-25
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dnsop                                                             L. Pan
Internet-Draft
Intended status: Informational                                     Y. Fu
Expires: March 29, 2018                                            CNNIC
                                                      September 25, 2017

          SWILD RR Type (Wildcard on Intermediate Nameservers)
                    draft-pan-dnsop-swild-rr-type-01

Abstract

   This document specifies a new SWILD RR type for Intermediate
   Nameservers to cache subdomain wildcard record, in order to optimize
   the wildcard domain cache miss, reduce the cache size, and help to
   defense the DDoS attack.

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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   This Internet-Draft will expire on March 29, 2018.

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   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   described in the Simplified BSD License.

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Internet-DraftSWILD RR Type (Wildcard on Intermediate NameSeptember 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  The SWILD Resource Record . . . . . . . . . . . . . . . . . .   3
   4.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     4.1.  Authoritative Nameserver  . . . . . . . . . . . . . . . .   3
     4.2.  Intermediate Nameserver: Recursive Resolver . . . . . . .   4
       4.2.1.  Recursive Resolvers that support SWILD RR . . . . . .   4
       4.2.2.  Recursive Resolvers that not support SWILD RR . . . .   4
     4.3.  Intermediate Nameserver: Forwarding Resolvers . . . . . .   4
   5.  DNS Cache . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   6.  DDoS  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   7.  DNSSEC  . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     7.1.  Compare to NSEC aggressiveuse wildcard  . . . . . . . . .   5
     7.2.  DNSSEC Deployment . . . . . . . . . . . . . . . . . . . .   6
     7.3.  Hijack Risk . . . . . . . . . . . . . . . . . . . . . . .   6
     7.4.  Stub Validation . . . . . . . . . . . . . . . . . . . . .   6
   8.  Disposable Domain . . . . . . . . . . . . . . . . . . . . . .   6
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   7
     10.2.  Informative References . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   [RFC1034] and [RFC4592] described wildcard domain name.

   Nowadays wildcard domain is globally used, take "*.github.io" for
   example,

  foo.github.io.           3600   IN  CNAME   sni.github.map.fastly.net.
  sni.github.map.fastly.net. 25   IN  A       151.101.73.147

   Wildcard domain is simple configured on Authoritative Nameserver, but
   Intermediate Nameservers have to cache various domains
   (xxx.github.io, yyy.github.io, ... ) of the same wildcard domain
   configuration, with low cache hit rate, increase cache size.

   This document specifies a new SWILD RR type for Intermediate
   Nameservers to cache subdomain wildcard record, in order to optimize
   the wildcard domain cache miss, reduce the cache size, and help to
   defense the DDoS attack.

   It is OPT-IN, Intermediate Nameservers can choose not to implement or
   enable it.

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