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[   ] srcid                               2017-07-29 04:01   14   

BIND 9

Contents

 1. Introduction
 2. Reporting bugs and getting help
 3. Contributing to BIND
 4. BIND 9.9 features
 5. Building BIND
 6. Compile-time options
 7. Automated testing
 8. Documentation
 9. Change log
10. 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 is 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 licenced 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 release notes and errata, see http://www.isc.org/software/
bind9/releasenotes

Reporting bugs and getting help

Please report assertion failure errors and suspected security issues to
[email protected].

General bug reports can be sent to [email protected].

Feature requests can be sent to [email protected].

Please note that, while ISC's ticketing system is not currently publicly
readable, this may change in the future. Please do not include information
in bug reports that you consider to be confidential. For example, when
sending the contents of your configuration file, it is advisable to
obscure key secrets; this can be done automatically by using
named-checkconf -px.

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

A public git repository for BIND is maintained at http://www.isc.org/git/,
and also on Github at https://github.com/isc-projects.

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

Patches for BIND may be submitted either as Github pull requests or via
email. When submitting a patch via email, please prepend the subject
header with "[PATCH]" so it will be easier for us to find. If your patch
introduces a new feature in BIND, please submit it to [email protected]
; if it fixes a bug, please submit it to [email protected].

BIND 9.9 features

BIND 9.9.0 includes a number of changes from BIND 9.8 and earlier
releases. New features include:

  * Inline signing, allowing automatic DNSSEC signing of master zones
    without modification of the zonefile, or "bump in the wire" signing in
    slaves.
  * NXDOMAIN redirection.
  * New rndc flushtree command clears all data under a given name from the
    DNS cache.
  * New rndc sync command dumps pending changes in a dynamic zone to disk
    without a freeze/thaw cycle.
  * New rndc signing command displays or clears signing status records in
    auto-dnssec zones.
  * NSEC3 parameters for auto-dnssec zones can now be set prior to
    signing, eliminating the need to initially sign with NSEC.
  * Startup time improvements on large authoritative servers.
  * Slave zones are now saved in raw format by default.
  * Several improvements to response policy zones (RPZ).
  * Improved hardware scalability by using multiple threads to listen for
    queries and using finer-grained client locking
  * The also-notify option now takes the same syntax as masters, so it can
    used named masterlists and TSIG keys.
  * dnssec-signzone -D writes an output file containing only DNSSEC data,
    which can be included by the primary zone file.
  * dnssec-signzone -R forces removal of signatures that are not expired
    but were created by a key which no longer exists.
  * dnssec-signzone -X allows a separate expiration date to be specified
    for DNSKEY signatures from other signatures.
  * New -L option to dnssec-keygen, dnssec-settime, and
    dnssec-keyfromlabel sets the default TTL for the key.
  * dnssec-dsfromkey now supports reading from standard input, to make it
    easier to convert DNSKEY to DS.
  * RFC 1918 reverse zones have been added to the empty-zones table per
    RFC

6303.

  * Dynamic updates can now optionally set the zone's SOA serial number to
    the current UNIX time.
  * DLZ modules can now retrieve the source IP address of the querying
    client.
  * request-ixfr option can now be set at the per-zone level.
  * dig +rrcomments turns on comments about DNSKEY records, indicating
    their key ID, algorithm and function
  * Simplified nsupdate syntax and added readline support

BIND 9.9.1

BIND 9.9.1 is a maintenance release.

BIND 9.9.2

BIND 9.9.2 is a maintenance release, and addresses the security flaw
described in CVE-2012-4244.

BIND 9.9.3

BIND 9.9.3 is a maintenance release and addresses the security flaws
described in CVE-2012-5688, CVE-2012-5689 and CVE-2013-2266.

BIND 9.9.4

BIND 9.9.4 is a maintenance release, and addresses the security flaws
described in CVE-2013-3919 and CVE-2013-4854. It also introduces DNS
Response Rate Limiting (DNS RRL) as a compile-time option. To use this
feature, configure with the --enable-rrl option.

BIND 9.9.5

BIND 9.9.5 is a maintenance release, and addresses the security flaws
described in CVE-2013-6320 and CVE-2014-0591. It also includes the
following functional enhancements:

  * named now preserves the capitalization of names when responding to
    queries.
  * new dnssec-importkey command allows the use of offline DNSSEC keys
    with automatic DNSKEY management.
  * When re-signing a zone, the new dnssec-signzone -Q option drops
    signatures from keys that are still published but are no longer
    active.
  * named-checkconf -px will print the contents of configuration files
    with the shared secrets obscured, making it easier to share
    configuration (e.g. when submitting a bug report) without revealing
    private information.

BIND 9.9.6

BIND 9.9.6 is a maintenance release, and also includes the following new
functionality.

  * The former behavior with respect to capitalization of names (prior to
    BIND 9.9.5) can be restored for specific clients via the new
    no-case-compress ACL.

BIND 9.9.7

BIND 9.9.7 is a maintenance release, and addresses the security flaws
described in CVE-2014-8500 and CVE-2015-1349.

BIND 9.9.8

BIND 9.9.8 is a maintenance release, and addresses the security flaws
described in CVE-2015-4620, CVE-2015-5477, CVE-2015-5722, and
CVE-2015-5986.

It also makes the following new features available via a compile-time
option:

  * New "fetchlimit" quotas are now available for the use of recursive
    resolvers that are are under high query load for domains whose
    authoritative servers are nonresponsive or are experiencing a denial
    of service attack.
      + fetches-per-server limits the number of simultaneous queries that
        can be sent to any single authoritative server. The configured
        value is a starting point; it is automatically adjusted downward
        if the server is partially or completely non-responsive. The
        algorithm used to adjust the quota can be configured via the
        fetch-quota-params option.
      + fetches-per-zone limits the number of simultaneous queries that
        can be sent for names within a single domain. (Note: Unlike
        fetches-per-server, this value is not self-tuning.)
      + New stats counters have been added to count queries spilled due to
        these quotas. NOTE: These options are NOT built in by default; use
        configure --enable-fetchlimit to enable them.

BIND 9.9.9

BIND 9.9.9 is a maintenance release and addresses bugs found in BIND 9.9.8
and earlier, as well as the security flaws described in CVE-2015-8000,
CVE-2015-8461, CVE-2015-8704, CVE-2016-1285, CVE-2016-1286, CVE-2016-2775
and CVE-2016-2776.

BIND 9.9.10

BIND 9.9.10 is a maintenance release and addresses the security flaws
disclosed in CVE-2016-2775, CVE-2016-2776, CVE-2016-6170, CVE-2016-8864,
CVE-2016-9131, CVE-2016-9147, CVE-2016-9444, CVE-2017-3135, CVE-2017-3136,
CVE-2017-3137, and CVE-2017-3138.

BIND 9.9.11

BIND 9.9.11 is a maintenance release, and addresses the security flaws
disclosed in CVE-2017-3140, CVE-2017-3141, CVE-2017-3142 and
CVE-2017-3143.

Building BIND

BIND requires a UNIX or Linux system with an ANSI C compiler, basic POSIX
support, and a 64-bit integer type. Successful builds have been observed
on many versions of Linux and UNIX, including RedHat, Fedora, Debian,
Ubuntu, SuSE, Slackware, FreeBSD, NetBSD, OpenBSD, Mac OS X, Solaris,
HP-UX, AIX, SCO OpenServer, and OpenWRT.

BIND is also available for Windows XP, 2003, 2008, and higher. See
win32utils/readme1st.txt for details on building for Windows systems.

To build on a UNIX or Linux system, use:

    $ ./configure
    $ make

If you're planning on making changes to the BIND 9 source, you should run
make depend. If you're using Emacs, you might find make tags helpful.

Several environment variables that can be set before running configure
will affect compilation:

Variable       Description
CC             The C compiler to use. configure tries to figure out the
               right one for supported systems.
               C compiler flags. Defaults to include -g and/or -O2 as
CFLAGS         supported by the compiler. Please include '-g' if you need
               to set CFLAGS.
               System header file directories. Can be used to specify
STD_CINCLUDES  where add-on thread or IPv6 support is, for example.
               Defaults to empty string.
               Any additional preprocessor symbols you want defined.
STD_CDEFINES   Defaults to empty string. For a list of possible settings,
               see the file OPTIONS.
LDFLAGS        Linker flags. Defaults to empty string.
BUILD_CC       Needed when cross-compiling: the native C compiler to use
               when building for the target system.
BUILD_CFLAGS   Optional, used for cross-compiling
BUILD_CPPFLAGS
BUILD_LDFLAGS
BUILD_LIBS

Compile-time options

To see a full list of configuration options, run configure --help.

On most platforms, BIND 9 is built with multithreading support, allowing
it to take advantage of multiple CPUs. You can configure this by
specifying --enable-threads or --disable-threads on the configure command
line. The default is to enable threads, except on some older operating
systems on which threads are known to have had problems in the past.
(Note: Prior to BIND 9.10, the default was to disable threads on Linux
systems; this has now been reversed. On Linux systems, the threaded build
is known to change BIND's behavior with respect to file permissions; it
may be necessary to specify a user with the -u option when running named.)

To build shared libraries, specify --with-libtool on the configure command
line.

Certain compiled-in constants and default settings can be increased to
values better suited to large servers with abundant memory resources (e.g,
64-bit servers with 12G or more of memory) by specifying --with-tuning=
large on the configure command line. This can improve performance on big
servers, but will consume more memory and may degrade performance on
smaller systems.

For the server to support DNSSEC, you need to build it with crypto
support. To use OpenSSL, you should have OpenSSL 1.0.2e or newer
installed. If the OpenSSL library is installed in a nonstandard location,
specify the prefix using "--with-openssl=/prefix" on the configure command
line. To use a PKCS#11 hardware service module for cryptographic
operations, specify the path to the PKCS#11 provider library using
"--with-pkcs11=/prefix", and configure BIND with "--enable-native-pkcs11".

To support the HTTP statistics channel, the server must be linked with
libxml2 http://xmlsoft.org If this is installed at a nonstandard location,
specify the prefix using --with-libxml2=/prefix.

Python requires the 'argparse' module to be available. 'argparse' is a
standard module as of Python 2.7 and Python 3.2.

On some platforms it is necessary to explicitly request large file support
to handle files bigger than 2GB. This can be done by using
--enable-largefile on the configure command line.

Support for the "fixed" rrset-order option can be enabled or disabled by
specifying --enable-fixed-rrset or --disable-fixed-rrset on the configure
command line. By default, fixed rrset-order is disabled to reduce memory
footprint.

If your operating system has integrated support for IPv6, it will be used
automatically. If you have installed KAME IPv6 separately, use --with-kame
[=PATH] to specify its location.

make install will install named and the various BIND 9 libraries. By
default, installation is into /usr/local, but this can be changed with the
--prefix option when running configure.

You may specify the option --sysconfdir to set the directory where
configuration files like named.conf go by default, and --localstatedir to
set the default parent directory of run/named.pid. For backwards
compatibility with BIND 8, --sysconfdir defaults to /etc and
--localstatedir defaults to /var if no --prefix option is given. If there
is a --prefix option, sysconfdir defaults to $prefix/etc and localstatedir
defaults to $prefix/var.

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 by running the script 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 Automated Testing Framework (ATF). To run
them, use configure --with-atf, then run 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 master 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.

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
    ([email protected])
  * This product includes software written by Tim Hudson
    ([email protected])