README

BIND 9

Contents

 1. Introduction
 2. Reporting bugs and getting help
 3. Contributing to BIND
 4. BIND 9.16 features
 5. Building BIND
 6. macOS
 7. Dependencies
 8. Compile-time options
 9. Automated testing
10. Documentation
11. Change log
12. Acknowledgments

Introduction

BIND (Berkeley Internet Name Domain) is a complete, highly portable
implementation of the DNS (Domain Name System) protocol.

The BIND name server, named, is able to serve as an authoritative name
server, recursive resolver, DNS forwarder, or all three simultaneously. It
implements views for split-horizon DNS, automatic DNSSEC zone signing and
key management, catalog zones to facilitate provisioning of zone data
throughout a name server constellation, response policy zones (RPZ) to
protect clients from malicious data, response rate limiting (RRL) and
recursive query limits to reduce distributed denial of service attacks,
and many other advanced DNS features. BIND also includes a suite of
administrative tools, including the dig and delv DNS lookup tools,
nsupdate for dynamic DNS zone updates, rndc for remote name server
administration, and more.

BIND 9 began as a complete re-write of the BIND architecture that was used
in versions 4 and 8. Internet Systems Consortium (https://www.isc.org), a
501(c)(3) public benefit corporation dedicated to providing software and
services in support of the Internet infrastructure, developed BIND 9 and
is responsible for its ongoing maintenance and improvement. BIND is open
source software licensed under the terms of the Mozilla Public License,
version 2.0.

For a summary of features introduced in past major releases of BIND, see
the file HISTORY.

For a detailed list of changes made throughout the history of BIND 9, see
the file CHANGES. See below for details on the CHANGES file format.

For up-to-date versions and release notes, see https://www.isc.org/
download/.

For information about supported platforms, see the "Supported Platforms"
section in the BIND 9 Administrator Reference Manual.

Reporting bugs and getting help

To report non-security-sensitive bugs or request new features, you may
open an Issue in the BIND 9 project on the ISC GitLab server at https://
gitlab.isc.org/isc-projects/bind9.

Please note that, unless you explicitly mark the newly created Issue as
"confidential", it will be publicly readable. Please do not include any
information in bug reports that you consider to be confidential unless the
issue has been marked as such. In particular, if submitting the contents
of your configuration file in a non-confidential Issue, it is advisable to
obscure key secrets: this can be done automatically by using
named-checkconf -px.

If the bug you are reporting is a potential security issue, such as an
assertion failure or other crash in named, please do NOT use GitLab to
report it. Instead, send mail to security-officer@isc.org using our
OpenPGP key to secure your message. (Information about OpenPGP and links
to our key can be found at https://www.isc.org/pgpkey.) Please do not
discuss the bug on any public mailing list.

For a general overview of ISC security policies, read the Knowledge Base
article at https://kb.isc.org/docs/aa-00861.

Professional support and training for BIND are available from ISC at
https://www.isc.org/support.

To join the BIND Users mailing list, or view the archives, visit https://
lists.isc.org/mailman/listinfo/bind-users.

If you're planning on making changes to the BIND 9 source code, you may
also want to join the BIND Workers mailing list, at https://lists.isc.org/
mailman/listinfo/bind-workers.

Contributing to BIND

ISC maintains a public git repository for BIND; details can be found at
http://www.isc.org/git/.

Information for BIND contributors can be found in the following files: -
General information: CONTRIBUTING.md - Code of Conduct: CODE_OF_CONDUCT.md
- BIND 9 code style: doc/dev/style.md - BIND architecture and developer
guide: doc/dev/dev.md

Patches for BIND may be submitted as merge requests in the ISC GitLab
server at at https://gitlab.isc.org/isc-projects/bind9/merge_requests.

By default, external contributors don't have ability to fork BIND in the
GitLab server, but if you wish to contribute code to BIND, you may request
permission to do so. Thereafter, you can create git branches and directly
submit requests that they be reviewed and merged.

If you prefer, you may also submit code by opening a GitLab Issue and
including your patch as an attachment, preferably generated by git
format-patch.

BIND 9.16 features

BIND 9.16 is the current stable branch of BIND 9. It includes all changes
from the 9.15 development branch, updating the previous stable branch,
9.14. New features include:

  * New dnssec-policy statement to configure a key and signing policy for
    zones, enabling automatic key regeneration and rollover.
  * New network manager based on libuv.
  * Added support for the new GeoIP2 geolocation API, libmaxminddb.
  * Improved DNSSEC trust anchor configuration using the trust-anchors
    statement, permitting configuration of trust anchors in DS as well as
    DNSKEY format.
  * YAML output for dig, mdig, and delv.

Building BIND

For information about building BIND 9, see the "Building BIND 9" section
in the BIND 9 Administrator Reference Manual.

Automated testing

A system test suite can be run with make test. The system tests require
you to configure a set of virtual IP addresses on your system (this allows
multiple servers to run locally and communicate with one another). These
IP addresses can be configured by running the command bin/tests/system/
ifconfig.sh up as root.

Some tests require Perl and the Net::DNS and/or IO::Socket::INET6 modules,
and will be skipped if these are not available. Some tests require Python
and the dnspython module and will be skipped if these are not available.
See bin/tests/system/README for further details.

Unit tests are implemented using the CMocka unit testing framework. To
build them, use configure --with-cmocka. Execution of tests is done by the
Kyua test execution engine; if the kyua command is available, then unit
tests can be run via make test or make unit.

Documentation

The BIND 9 Administrator Reference Manual is included with the source
distribution, in DocBook XML, HTML, and PDF format, in the doc/arm
directory.

Some of the programs in the BIND 9 distribution have man pages in their
directories. In particular, the command line options of named are
documented in bin/named/named.8.

Frequently (and not-so-frequently) asked questions and their answers can
be found in the ISC Knowledge Base at https://kb.isc.org.

Additional information on various subjects can be found in other README
files throughout the source tree.

Change log

A detailed list of all changes that have been made throughout the
development BIND 9 is included in the file CHANGES, with the most recent
changes listed first. Change notes include tags indicating the category of
the change that was made; these categories are:

   Category                            Description
[func]         New feature
[bug]          General bug fix
[security]     Fix for a significant security flaw
[experimental] Used for new features when the syntax or other aspects of
               the design are still in flux and may change
[port]         Portability enhancement
[maint]        Updates to built-in data such as root server addresses and
               keys
[tuning]       Changes to built-in configuration defaults and constants to
               improve performance
[performance]  Other changes to improve server performance
[protocol]     Updates to the DNS protocol such as new RR types
[test]         Changes to the automatic tests, not affecting server
               functionality
[cleanup]      Minor corrections and refactoring
[doc]          Documentation
[contrib]      Changes to the contributed tools and libraries in the
               'contrib' subdirectory
               Used in the main development branch to reserve change
[placeholder]  numbers for use in other branches, e.g., when fixing a bug
               that only exists in older releases

In general, [func] and [experimental] tags will only appear in new-feature
releases (i.e., those with version numbers ending in zero). Some new
functionality may be backported to older releases on a case-by-case basis.
All other change types may be applied to all currently-supported releases.

Bug report identifiers

Most notes in the CHANGES file include a reference to a bug report or
issue number. Prior to 2018, these were usually of the form [RT #NNN] and
referred to entries in the "bind9-bugs" RT database, which was not open to
the public. More recent entries use the form [GL #NNN] or, less often, [GL
!NNN], which, respectively, refer to issues or merge requests in the
GitLab database. Most of these are publicly readable, unless they include
information which is confidential or security sensitive.

To look up a GitLab issue by its number, use the URL https://
gitlab.isc.org/isc-projects/bind9/issues/NNN. To look up a merge request,
use https://gitlab.isc.org/isc-projects/bind9/merge_requests/NNN.

In rare cases, an issue or merge request number may be followed with the
letter "P". This indicates that the information is in the private ISC
GitLab instance, which is not visible to the public.

Acknowledgments

  * The original development of BIND 9 was underwritten by the following
    organizations:

      Sun Microsystems, Inc.
      Hewlett Packard
      Compaq Computer Corporation
      IBM
      Process Software Corporation
      Silicon Graphics, Inc.
      Network Associates, Inc.
      U.S. Defense Information Systems Agency
      USENIX Association
      Stichting NLnet - NLnet Foundation
      Nominum, Inc.

  * This product includes software developed by the OpenSSL Project for
    use in the OpenSSL Toolkit. http://www.OpenSSL.org/

  * This product includes cryptographic software written by Eric Young
    (eay@cryptsoft.com)

  * This product includes software written by Tim Hudson
    (tjh@cryptsoft.com)