DNSSEC Roadblock Avoidance
draft-ietf-dnsop-dnssec-roadblock-avoidance-03

The information below is for an old version of the document
Document Type Active Internet-Draft (dnsop WG)
Authors Wes Hardaker  , ├ôlafur Gu├░mundsson  , Suresh Krishnaswamy 
Last updated 2016-03-21
Replaces draft-hardaker-dnsop-dnssec-roadblock-avoidance
Stream IETF
Intended RFC status Best Current Practice
Formats pdf htmlized (tools) htmlized bibtex
Reviews
Stream WG state In WG Last Call
Document shepherd Tim Wicinski
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)
DNSOP                                                        W. Hardaker
Internet-Draft                                                   Parsons
Intended status: Best Current Practice                    O. Gudmundsson
Expires: September 22, 2016                                   CloudFlare
                                                         S. Krishnaswamy
                                                                 Parsons
                                                          March 21, 2016

                       DNSSEC Roadblock Avoidance
           draft-ietf-dnsop-dnssec-roadblock-avoidance-03.txt

Abstract

   This document describes problems that a DNSSEC aware resolver/
   application might run into within a non-compliant infrastructure.  It
   outline potential detection and mitigation techniques.  The scope of
   the document is to create a shared approache to detect and overcome
   network issues that a DNSSEC software/system may face.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on September 22, 2016.

Copyright Notice

   Copyright (c) 2016 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

Hardaker, et al.       Expires September 22, 2016               [Page 1]
Internet-Draft         DNSSEC Roadblock Avoidance             March 2016

   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  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Background  . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Implementation experiences  . . . . . . . . . . . . . . .   4
     1.3.  Notation  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Goals . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Detecting DNSSEC Non-Compilance . . . . . . . . . . . . . . .   5
     3.1.  Determining DNSSEC support in neighboring recursive
           resolvers . . . . . . . . . . . . . . . . . . . . . . . .   5
       3.1.1.  Supports UDP answers  . . . . . . . . . . . . . . . .   5
       3.1.2.  Supports TCP answers  . . . . . . . . . . . . . . . .   6
       3.1.3.  Supports EDNS0  . . . . . . . . . . . . . . . . . . .   6
       3.1.4.  Supports the DO bit . . . . . . . . . . . . . . . . .   6
       3.1.5.  Supports the AD bit DNSKEY algorithm 5  . . . . . . .   7
       3.1.6.  Returns RRsig for signed answer . . . . . . . . . . .   7
       3.1.7.  Supports querying for DNSKEY records  . . . . . . . .   7
       3.1.8.  Supports querying for DS records  . . . . . . . . . .   8
       3.1.9.  Supports negative answers with NSEC records . . . . .   8
       3.1.10. Supports negative answers with NSEC3 records  . . . .   8
       3.1.11. Supports queries where DNAME records lead to an
               answer  . . . . . . . . . . . . . . . . . . . . . . .   9
       3.1.12. Permissive DNSSEC . . . . . . . . . . . . . . . . . .   9
       3.1.13. UDP size limits . . . . . . . . . . . . . . . . . . .   9
       3.1.14. Supports Unknown RRtypes  . . . . . . . . . . . . . .   9
     3.2.  Direct Network Queries  . . . . . . . . . . . . . . . . .  10
       3.2.1.  Support for Remote UDP Over Port 53 . . . . . . . . .  10
       3.2.2.  Support for Remote UDP With Fragmentation . . . . . .  10
       3.2.3.  Support for Outbound TCP Over Port 53 . . . . . . . .  11
     3.3.  Support for DNSKEY and DS combinations  . . . . . . . . .  11
   4.  Aggregating The Results . . . . . . . . . . . . . . . . . . .  11
     4.1.  Resolver capability description . . . . . . . . . . . . .  12
   5.  Roadblock Avoidance . . . . . . . . . . . . . . . . . . . . .  12
     5.1.  Partial Resolver Usage  . . . . . . . . . . . . . . . . .  15
       5.1.1.  Known Insecure Lookups  . . . . . . . . . . . . . . .  15
       5.1.2.  Partial NSEC/NSEC3 Support  . . . . . . . . . . . . .  15
Show full document text