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780 lines
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780 lines
36 KiB
HTML
<!--
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-
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- This Source Code Form is subject to the terms of the Mozilla Public
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- License, v. 2.0. If a copy of the MPL was not distributed with this
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- file, You can obtain one at http://mozilla.org/MPL/2.0/.
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="article"><div class="section">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="id-1.2"></a>Release Notes for BIND Version 9.11.0b3</h2></div></div></div>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="relnotes_intro"></a>Introduction</h3></div></div></div>
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<p>
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BIND 9.11.0 is a new feature release of BIND, still under development.
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This document summarizes new features and functional changes that
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have been introduced on this branch. With each development
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release leading up to the final BIND 9.11.0 release, this document
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will be updated with additional features added and bugs fixed.
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</p>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="relnotes_download"></a>Download</h3></div></div></div>
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<p>
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The latest versions of BIND 9 software can always be found at
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<a class="link" href="http://www.isc.org/downloads/" target="_top">http://www.isc.org/downloads/</a>.
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There you will find additional information about each release,
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source code, and pre-compiled versions for Microsoft Windows
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operating systems.
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</p>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="relnotes_license"></a>License Change</h3></div></div></div>
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<p>
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With the release of BIND 9.11.0, ISC is changing the open
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source license for BIND from the ISC license to the Mozilla
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Public License (MPL 2.0). This change is effective from BIND
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9.11.0b1 onwards.
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</p>
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<p>
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The MPL-2.0 license requires that if you make changes to
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||
licensed software (e.g. BIND) and distribute them outside
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your organization, that you publish those changes under that
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same license. It does not require that you publish or disclose
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anything other than the changes you made to our software.
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</p>
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<p>
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This new requirement will not affect anyone who is using BIND
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without redistributing it, nor anyone redistributing it without
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changes, therefore this change will be without consequence
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for most individuals and organizations who are using BIND.
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</p>
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<p>
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Those unsure whether or not the license change affects their
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use of BIND, or who wish to discuss how to comply with the
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license may contact ISC at <a class="link" href="https://www.isc.org/mission/contact/" target="_top">
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https://www.isc.org/mission/contact/</a>.
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</p>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="relnotes_security"></a>Security Fixes</h3></div></div></div>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
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getrrsetbyname with a non absolute name could trigger an
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infinite recursion bug in lwresd and named with lwres
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configured if when combined with a search list entry the
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resulting name is too long. This flaw is disclosed in
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CVE-2016-2775. [RT #42694]
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</p></li></ul></div>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="relnotes_features"></a>New Features</h3></div></div></div>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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<p>
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A new method of provisioning secondary servers called
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"Catalog Zones" has been added. This is an implementation of
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<a class="link" href="https://datatracker.ietf.org/doc/draft-muks-dnsop-dns-catalog-zones/" target="_top">
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draft-muks-dnsop-dns-catalog-zones/
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</a>.
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</p>
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<p>
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A catalog zone is a regular DNS zone which contains a list
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of "member zones", along with the configuration options for
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each of those zones. When a server is configured to use a
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catalog zone, all the zones listed in the catalog zone are
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added to the local server as slave zones. When the catalog
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zone is updated (e.g., by adding or removing zones, or
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changing configuration options for existing zones) those
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changes will be put into effect. Since the catalog zone is
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itself a DNS zone, this means configuration changes can be
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propagated to slaves using the standard AXFR/IXFR update
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mechanism.
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</p>
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<p>
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This feature should be considered experimental. It currently
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supports only basic features; more advanced features such as
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ACLs and TSIG keys are not yet supported. Example catalog
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zone configurations can be found in the Chapter 9 of the
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BIND Administrator Reference Manual.
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</p>
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<p>
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Support for master entries with TSIG keys has been added to catalog
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zones, as well as support for allow-query and allow-transfer.
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</p>
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</li>
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<li class="listitem"><p>
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Added an <span class="command"><strong>isc.rndc</strong></span> Python module, which allows
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<span class="command"><strong>rndc</strong></span> commands to be sent from Python programs.
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</p></li>
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<li class="listitem">
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<p>
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Added support for DynDB, a new interface for loading zone data
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from an external database, developed by Red Hat for the FreeIPA
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project. (Thanks in particular to Adam Tkac and Petr
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Spacek of Red Hat for the contribution.)
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</p>
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<p>
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Unlike the existing DLZ and SDB interfaces, which provide a
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limited subset of database functionality within BIND —
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translating DNS queries into real-time database lookups with
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relatively poor performance and with no ability to handle
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DNSSEC-signed data — DynDB is able to fully implement
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and extend the database API used natively by BIND.
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</p>
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<p>
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A DynDB module could pre-load data from an external data
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source, then serve it with the same performance and
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functionality as conventional BIND zones, and with the
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ability to take advantage of database features not
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available in BIND, such as multi-master replication.
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</p>
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</li>
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<li class="listitem">
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<p>
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New quotas have been added to limit the queries that are
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sent by recursive resolvers to authoritative servers
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experiencing denial-of-service attacks. When configured,
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these options can both reduce the harm done to authoritative
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servers and also avoid the resource exhaustion that can be
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experienced by recursive servers when they are being used as a
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vehicle for such an attack.
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
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<li class="listitem"><p>
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<code class="option">fetches-per-server</code> limits the number of
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simultaneous queries that can be sent to any single
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authoritative server. The configured value is a starting
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point; it is automatically adjusted downward if the server is
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partially or completely non-responsive. The algorithm used to
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adjust the quota can be configured via the
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<code class="option">fetch-quota-params</code> option.
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</p></li>
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<li class="listitem"><p>
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<code class="option">fetches-per-zone</code> limits the number of
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simultaneous queries that can be sent for names within a
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single domain. (Note: Unlike "fetches-per-server", this
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value is not self-tuning.)
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</p></li>
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</ul></div>
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<p>
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Statistics counters have also been added to track the number
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of queries affected by these quotas.
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</p>
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</li>
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<li class="listitem">
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<p>
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Added support for <span class="command"><strong>dnstap</strong></span>, a fast,
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flexible method for capturing and logging DNS traffic,
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developed by Robert Edmonds at Farsight Security, Inc.,
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whose assistance is gratefully acknowledged.
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</p>
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<p>
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To enable <span class="command"><strong>dnstap</strong></span> at compile time,
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the <span class="command"><strong>fstrm</strong></span> and <span class="command"><strong>protobuf-c</strong></span>
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libraries must be available, and BIND must be configured with
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<code class="option">--enable-dnstap</code>.
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</p>
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<p>
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A new utility <span class="command"><strong>dnstap-read</strong></span> has been added
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to allow <span class="command"><strong>dnstap</strong></span> data to be presented in
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a human-readable format.
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</p>
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<p>
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<span class="command"><strong>rndc dnstap -roll</strong></span> causes <span class="command"><strong>dnstap</strong></span>
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output files to be rolled like log files -- the most recent output
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file is renamed with a <code class="filename">.0</code> suffix, the next
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most recent with <code class="filename">.1</code>, etc. (Note that this
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only works when <span class="command"><strong>dnstap</strong></span> output is being written
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to a file, not to a UNIX domain socket.) An optional numerical
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argument specifies how many backup log files to retain; if not
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specified or set to 0, there is no limit.
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</p>
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<p>
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<span class="command"><strong>rndc dnstap -reopen</strong></span> simply closes and reopens
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the <span class="command"><strong>dnstap</strong></span> output channel without renaming
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the output file.
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</p>
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<p>
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For more information on <span class="command"><strong>dnstap</strong></span>, see
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<a class="link" href="http://dnstap.info" target="_top">http://dnstap.info</a>.
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</p>
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</li>
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<li class="listitem">
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<p>
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New statistics counters have been added to track traffic
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sizes, as specified in RSSAC002. Query and response
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message sizes are broken up into ranges of histogram buckets:
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TCP and UDP queries of size 0-15, 16-31, ..., 272-288, and 288+,
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and TCP and UDP responses of size 0-15, 16-31, ..., 4080-4095,
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and 4096+. These values can be accessed via the XML and JSON
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statistics channels at, for example,
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<a class="link" href="http://localhost:8888/xml/v3/traffic" target="_top">http://localhost:8888/xml/v3/traffic</a>
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or
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<a class="link" href="http://localhost:8888/json/v1/traffic" target="_top">http://localhost:8888/json/v1/traffic</a>.
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</p>
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<p>
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Statistics for RSSAC02v3 traffic-volume, traffic-sizes and
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rcode-volume reporting are now collected.
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</p>
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</li>
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<li class="listitem">
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<p>
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A new DNSSEC key management utility,
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<span class="command"><strong>dnssec-keymgr</strong></span>, has been added. This tool
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is meant to run unattended (e.g., under <span class="command"><strong>cron</strong></span>).
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It reads a policy definition file
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(default: <code class="filename">/etc/dnssec.policy</code>)
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and creates or updates DNSSEC keys as necessary to ensure that a
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zone's keys match the defined policy for that zone. New keys are
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created whenever necessary to ensure rollovers occur correctly.
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Existing keys' timing metadata is adjusted as needed to set the
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correct rollover period, prepublication interval, etc. If
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the configured policy changes, keys are corrected automatically.
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See the <span class="command"><strong>dnssec-keymgr</strong></span> man page for full details.
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</p>
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<p>
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Note: <span class="command"><strong>dnssec-keymgr</strong></span> depends on Python and on
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the Python lex/yacc module, PLY. The other Python-based tools,
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<span class="command"><strong>dnssec-coverage</strong></span> and
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<span class="command"><strong>dnssec-checkds</strong></span>, have been
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refactored and updated as part of this work.
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</p>
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<p>
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<span class="command"><strong>dnssec-keymgr</strong></span> now takes a -r
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<em class="replaceable"><code>randomfile</code></em> option.
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</p>
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<p>
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(Many thanks to Sebasti<74>n
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Castro for his assistance in developing this tool at the IETF
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95 Hackathon in Buenos Aires, April 2016.)
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</p>
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</li>
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<li class="listitem"><p>
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The serial number of a dynamically updatable zone can
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now be set using
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<span class="command"><strong>rndc signing -serial <em class="replaceable"><code>number</code></em> <em class="replaceable"><code>zonename</code></em></strong></span>.
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This is particularly useful with <code class="option">inline-signing</code>
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zones that have been reset. Setting the serial number to a value
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larger than that on the slaves will trigger an AXFR-style
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transfer.
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</p></li>
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<li class="listitem"><p>
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When answering recursive queries, SERVFAIL responses can now be
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cached by the server for a limited time; subsequent queries for
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the same query name and type will return another SERVFAIL until
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the cache times out. This reduces the frequency of retries
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when a query is persistently failing, which can be a burden
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on recursive servers. The SERVFAIL cache timeout is controlled
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by <code class="option">servfail-ttl</code>, which defaults to 1 second
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and has an upper limit of 30.
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</p></li>
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<li class="listitem"><p>
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The new <span class="command"><strong>rndc nta</strong></span> command can now be used to
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set a "negative trust anchor" (NTA), disabling DNSSEC validation for
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a specific domain; this can be used when responses from a domain
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are known to be failing validation due to administrative error
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rather than because of a spoofing attack. NTAs are strictly
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temporary; by default they expire after one hour, but can be
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configured to last up to one week. The default NTA lifetime
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can be changed by setting the <code class="option">nta-lifetime</code> in
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<code class="filename">named.conf</code>. When added, NTAs are stored in a
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file (<code class="filename"><em class="replaceable"><code>viewname</code></em>.nta</code>)
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in order to persist across restarts of the <span class="command"><strong>named</strong></span> server.
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</p></li>
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<li class="listitem"><p>
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The EDNS Client Subnet (ECS) option is now supported for
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authoritative servers; if a query contains an ECS option then
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ACLs containing <code class="option">geoip</code> or <code class="option">ecs</code>
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elements can match against the address encoded in the option.
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This can be used to select a view for a query, so that different
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answers can be provided depending on the client network.
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</p></li>
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<li class="listitem"><p>
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The EDNS EXPIRE option has been implemented on the client
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side, allowing a slave server to set the expiration timer
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correctly when transferring zone data from another slave
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server.
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</p></li>
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<li class="listitem"><p>
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A new <code class="option">masterfile-style</code> zone option controls
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the formatting of text zone files: When set to
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<code class="literal">full</code>, the zone file will dumped in
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||
single-line-per-record format.
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||
</p></li>
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<li class="listitem"><p>
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<span class="command"><strong>dig +ednsopt</strong></span> can now be used to set
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arbitrary EDNS options in DNS requests.
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||
</p></li>
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<li class="listitem"><p>
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<span class="command"><strong>dig +ednsflags</strong></span> can now be used to set
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yet-to-be-defined EDNS flags in DNS requests.
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||
</p></li>
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<li class="listitem"><p>
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<span class="command"><strong>dig +[no]ednsnegotiation</strong></span> can now be used enable /
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||
disable EDNS version negotiation.
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||
</p></li>
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<li class="listitem"><p>
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<span class="command"><strong>dig +header-only</strong></span> can now be used to send
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queries without a question section.
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</p></li>
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<li class="listitem"><p>
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<span class="command"><strong>dig +ttlunits</strong></span> causes <span class="command"><strong>dig</strong></span>
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||
to print TTL values with time-unit suffixes: w, d, h, m, s for
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||
weeks, days, hours, minutes, and seconds.
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||
</p></li>
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||
<li class="listitem"><p>
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||
<span class="command"><strong>dig +zflag</strong></span> can be used to set the last
|
||
unassigned DNS header flag bit. This bit is normally zero.
|
||
</p></li>
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||
<li class="listitem"><p>
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||
<span class="command"><strong>dig +dscp=<em class="replaceable"><code>value</code></em></strong></span>
|
||
can now be used to set the DSCP code point in outgoing query
|
||
packets.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>dig +mapped</strong></span> can now be used to determine
|
||
if mapped IPv4 addresses can be used.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>nslookup</strong></span> will now look up IPv6 as well
|
||
as IPv4 addresses by default. [RT #40420]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<code class="option">serial-update-method</code> can now be set to
|
||
<code class="literal">date</code>. On update, the serial number will
|
||
be set to the current date in YYYYMMDDNN format.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>dnssec-signzone -N date</strong></span> also sets the serial
|
||
number to YYYYMMDDNN.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>named -L <em class="replaceable"><code>filename</code></em></strong></span>
|
||
causes <span class="command"><strong>named</strong></span> to send log messages to the
|
||
specified file by default instead of to the system log.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
The rate limiter configured by the
|
||
<code class="option">serial-query-rate</code> option no longer covers
|
||
NOTIFY messages; those are now separately controlled by
|
||
<code class="option">notify-rate</code> and
|
||
<code class="option">startup-notify-rate</code> (the latter of which
|
||
controls the rate of NOTIFY messages sent when the server
|
||
is first started up or reconfigured).
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
The default number of tasks and client objects available
|
||
for serving lightweight resolver queries have been increased,
|
||
and are now configurable via the new <code class="option">lwres-tasks</code>
|
||
and <code class="option">lwres-clients</code> options in
|
||
<code class="filename">named.conf</code>. [RT #35857]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Log output to files can now be buffered by specifying
|
||
<span class="command"><strong>buffered yes;</strong></span> when creating a channel.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>delv +tcp</strong></span> will exclusively use TCP when
|
||
sending queries.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>named</strong></span> will now check to see whether
|
||
other name server processes are running before starting up.
|
||
This is implemented in two ways: 1) by refusing to start
|
||
if the configured network interfaces all return "address
|
||
in use", and 2) by attempting to acquire a lock on a file
|
||
specified by the <code class="option">lock-file</code> option or
|
||
the <span class="command"><strong>-X</strong></span> command line option. The
|
||
default lock file is
|
||
<code class="filename">/var/run/named/named.lock</code>.
|
||
Specifying <code class="literal">none</code> will disable the lock
|
||
file check.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>rndc delzone</strong></span> can now be applied to zones
|
||
which were configured in <code class="filename">named.conf</code>;
|
||
it is no longer restricted to zones which were added by
|
||
<span class="command"><strong>rndc addzone</strong></span>. (Note, however, that
|
||
this does not edit <code class="filename">named.conf</code>; the zone
|
||
must be removed from the configuration or it will return
|
||
when <span class="command"><strong>named</strong></span> is restarted or reloaded.)
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>rndc modzone</strong></span> can be used to reconfigure
|
||
a zone, using similar syntax to <span class="command"><strong>rndc addzone</strong></span>.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>rndc showzone</strong></span> displays the current
|
||
configuration for a specified zone.
|
||
</p></li>
|
||
<li class="listitem">
|
||
<p>
|
||
When BIND is built with the <span class="command"><strong>lmdb</strong></span> library
|
||
(Lightning Memory-Mapped Database), <span class="command"><strong>named</strong></span>
|
||
will store the configuration information for zones
|
||
that are added via <span class="command"><strong>rndc addzone</strong></span>
|
||
in a database, rather than in a flat "NZF" file. This
|
||
dramatically improves performance for
|
||
<span class="command"><strong>rndc delzone</strong></span> and
|
||
<span class="command"><strong>rndc modzone</strong></span>: deleting or changing
|
||
the contents of a database is much faster than rewriting
|
||
a text file.
|
||
</p>
|
||
<p>
|
||
On startup, if <span class="command"><strong>named</strong></span> finds an existing
|
||
NZF file, it will automatically convert it to the new NZD
|
||
database format.
|
||
</p>
|
||
<p>
|
||
To view the contents of an NZD, or to convert an
|
||
NZD back to an NZF file (for example, to revert back
|
||
to an earlier version of BIND which did not support the
|
||
NZD format), use the new command <span class="command"><strong>named-nzd2nzf</strong></span>
|
||
[RT #39837]
|
||
</p>
|
||
</li>
|
||
<li class="listitem">
|
||
<p>
|
||
Added server-side support for pipelined TCP queries. Clients
|
||
may continue sending queries via TCP while previous queries are
|
||
processed in parallel. Responses are sent when they are
|
||
ready, not necessarily in the order in which the queries were
|
||
received.
|
||
</p>
|
||
<p>
|
||
To revert to the former behavior for a particular
|
||
client address or range of addresses, specify the address prefix
|
||
in the "keep-response-order" option. To revert to the former
|
||
behavior for all clients, use "keep-response-order { any; };".
|
||
</p>
|
||
</li>
|
||
<li class="listitem"><p>
|
||
The new <span class="command"><strong>mdig</strong></span> command is a version of
|
||
<span class="command"><strong>dig</strong></span> that sends multiple pipelined
|
||
queries and then waits for responses, instead of sending one
|
||
query and waiting the response before sending the next. [RT #38261]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
To enable better monitoring and troubleshooting of RFC 5011
|
||
trust anchor management, the new <span class="command"><strong>rndc managed-keys</strong></span>
|
||
can be used to check status of trust anchors or to force keys
|
||
to be refreshed. Also, the managed-keys data file now has
|
||
easier-to-read comments. [RT #38458]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
An <span class="command"><strong>--enable-querytrace</strong></span> configure switch is
|
||
now available to enable very verbose query trace logging. This
|
||
option can only be set at compile time. This option has a
|
||
negative performance impact and should be used only for
|
||
debugging. [RT #37520]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
A new <span class="command"><strong>tcp-only</strong></span> option can be specified
|
||
in <span class="command"><strong>server</strong></span> statements to force
|
||
<span class="command"><strong>named</strong></span> to connect to the specified
|
||
server via TCP. [RT #37800]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
The <span class="command"><strong>nxdomain-redirect</strong></span> option specifies
|
||
a DNS namespace to use for NXDOMAIN redirection. When a
|
||
recursive lookup returns NXDOMAIN, a second lookup is
|
||
initiated with the specified name appended to the query
|
||
name. This allows NXDOMAIN redirection data to be supplied
|
||
by multiple zones configured on the server or by recursive
|
||
queries to other servers. (The older method, using
|
||
a single <span class="command"><strong>type redirect</strong></span> zone, has
|
||
better average performance but is less flexible.) [RT #37989]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
The following types have been implemented: CSYNC, NINFO, RKEY,
|
||
SINK, TA, TALINK.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
A new <span class="command"><strong>message-compression</strong></span> option can be
|
||
used to specify whether or not to use name compression when
|
||
answering queries. Setting this to <strong class="userinput"><code>no</code></strong>
|
||
results in larger responses, but reduces CPU consumption and
|
||
may improve throughput. The default is <strong class="userinput"><code>yes</code></strong>.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
A <span class="command"><strong>read-only</strong></span> option is now available in the
|
||
<span class="command"><strong>controls</strong></span> statement to grant non-destructive
|
||
control channel access. In such cases, a restricted set of
|
||
<span class="command"><strong>rndc</strong></span> commands are allowed, which can
|
||
report information from <span class="command"><strong>named</strong></span>, but cannot
|
||
reconfigure or stop the server. By default, the control channel
|
||
access is <span class="emphasis"><em>not</em></span> restricted to these
|
||
read-only operations. [RT #40498]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
When loading a signed zone, <span class="command"><strong>named</strong></span> will
|
||
now check whether an RRSIG's inception time is in the future,
|
||
and if so, it will regenerate the RRSIG immediately. This helps
|
||
when a system's clock needs to be reset backwards.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
The new <span class="command"><strong>minimal-any</strong></span> option reduces the size
|
||
of answers to UDP queries for type ANY by implementing one of
|
||
the strategies in "draft-ietf-dnsop-refuse-any": returning
|
||
a single arbitrarily-selected RRset that matches the query
|
||
name rather than returning all of the matching RRsets.
|
||
Thanks to Tony Finch for the contribution. [RT #41615]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>named</strong></span> now provides feedback to the
|
||
owners of zones which have trust anchors configured
|
||
(<span class="command"><strong>trusted-keys</strong></span>,
|
||
<span class="command"><strong>managed-keys</strong></span>, <span class="command"><strong>dnssec-validation
|
||
auto;</strong></span> and <span class="command"><strong>dnssec-lookaside auto;</strong></span>)
|
||
by sending a daily query which encodes the keyids of the
|
||
configured trust anchors for the zone. This is controlled
|
||
by <span class="command"><strong>trust-anchor-telemetry</strong></span> and defaults
|
||
to yes.
|
||
</p></li>
|
||
</ul></div>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="relnotes_changes"></a>Feature Changes</h3></div></div></div>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem"><p>
|
||
The ISC DNSSEC Lookaside Validation (DLV) service is scheduled
|
||
to be disabled in 2017. A warning is now logged when
|
||
<span class="command"><strong>named</strong></span> is configured to use this service,
|
||
either explicitly or via <code class="option">dnssec-lookaside auto;</code>.
|
||
[RT #42207]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
The timers returned by the statistics channel (indicating current
|
||
time, server boot time, and most recent reconfiguration time) are
|
||
now reported with millisecond accuracy. [RT #40082]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Updated the compiled-in addresses for H.ROOT-SERVERS.NET
|
||
and L.ROOT-SERVERS.NET.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
ACLs containing <span class="command"><strong>geoip asnum</strong></span> elements were
|
||
not correctly matched unless the full organization name was
|
||
specified in the ACL (as in
|
||
<span class="command"><strong>geoip asnum "AS1234 Example, Inc.";</strong></span>).
|
||
They can now match against the AS number alone (as in
|
||
<span class="command"><strong>geoip asnum "AS1234";</strong></span>).
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
When using native PKCS#11 cryptography (i.e.,
|
||
<span class="command"><strong>configure --enable-native-pkcs11</strong></span>) HSM PINs
|
||
of up to 256 characters can now be used.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
NXDOMAIN responses to queries of type DS are now cached separately
|
||
from those for other types. This helps when using "grafted" zones
|
||
of type forward, for which the parent zone does not contain a
|
||
delegation, such as local top-level domains. Previously a query
|
||
of type DS for such a zone could cause the zone apex to be cached
|
||
as NXDOMAIN, blocking all subsequent queries. (Note: This
|
||
change is only helpful when DNSSEC validation is not enabled.
|
||
"Grafted" zones without a delegation in the parent are not a
|
||
recommended configuration.)
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Update forwarding performance has been improved by allowing
|
||
a single TCP connection to be shared between multiple updates.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
By default, <span class="command"><strong>nsupdate</strong></span> will now check
|
||
the correctness of hostnames when adding records of type
|
||
A, AAAA, MX, SOA, NS, SRV or PTR. This behavior can be
|
||
disabled with <span class="command"><strong>check-names no</strong></span>.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Added support for OPENPGPKEY type.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
The names of the files used to store managed keys and added
|
||
zones for each view are no longer based on the SHA256 hash
|
||
of the view name, except when this is necessary because the
|
||
view name contains characters that would be incompatible with use
|
||
as a file name. For views whose names do not contain forward
|
||
slashes ('/'), backslashes ('\'), or capital letters - which
|
||
could potentially cause namespace collision problems on
|
||
case-insensitive filesystems - files will now be named
|
||
after the view (for example, <code class="filename">internal.mkeys</code>
|
||
or <code class="filename">external.nzf</code>). However, to ensure
|
||
consistent behavior when upgrading, if a file using the old
|
||
name format is found to exist, it will continue to be used.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
"rndc" can now return text output of arbitrary size to
|
||
the caller. (Prior to this, certain commands such as
|
||
"rndc tsig-list" and "rndc zonestatus" could return
|
||
truncated output.)
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Errors reported when running <span class="command"><strong>rndc addzone</strong></span>
|
||
(e.g., when a zone file cannot be loaded) have been clarified
|
||
to make it easier to diagnose problems.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
When encountering an authoritative name server whose name is
|
||
an alias pointing to another name, the resolver treats
|
||
this as an error and skips to the next server. Previously
|
||
this happened silently; now the error will be logged to
|
||
the newly-created "cname" log category.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
If <span class="command"><strong>named</strong></span> is not configured to validate
|
||
answers, then allow fallback to plain DNS on timeout even when
|
||
we know the server supports EDNS. This will allow the server to
|
||
potentially resolve signed queries when TCP is being
|
||
blocked.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Large inline-signing changes should be less disruptive.
|
||
Signature generation is now done incrementally; the number
|
||
of signatures to be generated in each quantum is controlled
|
||
by "sig-signing-signatures <em class="replaceable"><code>number</code></em>;".
|
||
[RT #37927]
|
||
</p></li>
|
||
<li class="listitem">
|
||
<p>
|
||
The experimental SIT option (code point 65001) of BIND
|
||
9.10.0 through BIND 9.10.2 has been replaced with the COOKIE
|
||
option (code point 10). It is no longer experimental, and
|
||
is sent by default, by both <span class="command"><strong>named</strong></span> and
|
||
<span class="command"><strong>dig</strong></span>.
|
||
</p>
|
||
<p>
|
||
The SIT-related named.conf options have been marked as
|
||
obsolete, and are otherwise ignored.
|
||
</p>
|
||
</li>
|
||
<li class="listitem"><p>
|
||
When <span class="command"><strong>dig</strong></span> receives a truncated (TC=1)
|
||
response or a BADCOOKIE response code from a server, it
|
||
will automatically retry the query using the server COOKIE
|
||
that was returned by the server in its initial response.
|
||
[RT #39047]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
A alternative NXDOMAIN redirect method (nxdomain-redirect)
|
||
which allows the redirect information to be looked up from
|
||
a namespace on the Internet rather than requiring a zone
|
||
to be configured on the server is now available.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Retrieving the local port range from net.ipv4.ip_local_port_range
|
||
on Linux is now supported.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
A new <code class="option">nsip-wait-recurse</code> directive has been
|
||
added to RPZ, specifying whether to look up unknown name server
|
||
IP addresses and wait for a response before applying RPZ-NSIP rules.
|
||
The default is <strong class="userinput"><code>yes</code></strong>. If set to
|
||
<strong class="userinput"><code>no</code></strong>, <span class="command"><strong>named</strong></span> will only
|
||
apply RPZ-NSIP rules to servers whose addresses are already cached.
|
||
The addresses will be looked up in the background so the rule can
|
||
be applied on subsequent queries. This improves performance when
|
||
the cache is cold, at the cost of temporary imprecision in applying
|
||
policy directives. [RT #35009]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Within the <code class="option">response-policy</code> option, it is now
|
||
possible to configure RPZ rewrite logging on a per-zone basis
|
||
using the <code class="option">log</code> clause.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
The default preferred glue is now the address type of the
|
||
transport the query was received over.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
On machines with 2 or more processors (CPU), the default value
|
||
for the number of UDP listeners has been changed to the number
|
||
of detected processors minus one.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Zone transfers now use smaller message sizes to improve
|
||
message compression. This results in reduced network usage.
|
||
</p></li>
|
||
<li class="listitem">
|
||
<p>
|
||
Added support for the AVC resource record type (Application
|
||
Visibility and Control).
|
||
</p>
|
||
<p>
|
||
Changed <span class="command"><strong>rndc reconfig</strong></span> behavior so that newly
|
||
added zones are loaded asynchronously and the loading does not
|
||
block the server.
|
||
</p>
|
||
</li>
|
||
<li class="listitem"><p>
|
||
<span class="command"><strong>minimal-responses</strong></span> now takes two new
|
||
arguments: <code class="option">no-auth</code> suppresses
|
||
populating the authority section but not the additional
|
||
section; <code class="option">no-auth-recursive</code>
|
||
does the same but only when answering recursive queries.
|
||
</p></li>
|
||
</ul></div>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="relnotes_port"></a>Porting Changes</h3></div></div></div>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
|
||
None.
|
||
</p></li></ul></div>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="relnotes_bugs"></a>Bug Fixes</h3></div></div></div>
|
||
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
|
||
<li class="listitem"><p>
|
||
Fixed a crash when calling <span class="command"><strong>rndc stats</strong></span> on some
|
||
Windows builds: some Visual Studio compilers generate code that
|
||
crashes when the "%z" printf() format specifier is used. [RT #42380]
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
Windows installs were failing due to triggering UAC without
|
||
the installation binary being signed.
|
||
</p></li>
|
||
<li class="listitem"><p>
|
||
A change in the internal binary representation of the RBT database
|
||
node structure enabled a race condition to occur (especially when
|
||
BIND was built with certain compilers or optimizer settings),
|
||
leading to inconsistent database state which caused random
|
||
assertion failures. [RT #42380]
|
||
</p></li>
|
||
</ul></div>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="end_of_life"></a>End of Life</h3></div></div></div>
|
||
<p>
|
||
The end of life for BIND 9.11 is yet to be determined but
|
||
will not be before BIND 9.13.0 has been released for 6 months.
|
||
<a class="link" href="https://www.isc.org/downloads/software-support-policy/" target="_top">https://www.isc.org/downloads/software-support-policy/</a>
|
||
</p>
|
||
</div>
|
||
<div class="section">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="relnotes_thanks"></a>Thank You</h3></div></div></div>
|
||
<p>
|
||
Thank you to everyone who assisted us in making this release possible.
|
||
If you would like to contribute to ISC to assist us in continuing to
|
||
make quality open source software, please visit our donations page at
|
||
<a class="link" href="http://www.isc.org/donate/" target="_top">http://www.isc.org/donate/</a>.
|
||
</p>
|
||
</div>
|
||
</div></div></body>
|
||
</html>
|