freebsd/contrib/bind9/README

BIND 9

	BIND version 9 is a major rewrite of nearly all aspects of the
	underlying BIND architecture.  Some of the important features of
	BIND 9 are:

		- DNS Security
			DNSSEC (signed zones)
			TSIG (signed DNS requests)

		- IP version 6
			Answers DNS queries on IPv6 sockets
			IPv6 resource records (AAAA)
			Experimental IPv6 Resolver Library

		- DNS Protocol Enhancements
			IXFR, DDNS, Notify, EDNS0
			Improved standards conformance

		- Views
			One server process can provide multiple "views" of
			the DNS namespace, e.g. an "inside" view to certain
			clients, and an "outside" view to others.

		- Multiprocessor Support

		- Improved Portability Architecture


	BIND version 9 development has been 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.

BIND 9.6.2

	BIND 9.6.2 is a maintenance release, fixing bugs in 9.6.1.
        It also introduces support for the SHA-2 DNSSEC algorithms,
        RSASHA256 and RSASHA512.

        Known issues in this release:

        - A validating resolver that has been incorrectly configured with
          an invalid trust anchor will be unable to resolve names covered
          by that trust anchor.  In all current versions of BIND 9, such a
          resolver will also generate significant unnecessary DNS traffic
          while trying to validate.  The latter problem will be addressed
          in future BIND 9 releases.  In the meantime, to avoid these
          problems, exercise caution when configuring "trusted-keys":
          make sure all keys are correct and current when you add them,
          and update your configuration in a timely manner when keys
          roll over.

BIND 9.6.1

	BIND 9.6.1 is a maintenance release, fixing bugs in 9.6.0.

BIND 9.6.0

        BIND 9.6.0 includes a number of changes from BIND 9.5 and earlier
        releases, including:

        Full NSEC3 support

        Automatic zone re-signing

	New update-policy methods tcp-self and 6to4-self

        The BIND 8 resolver library, libbind, has been removed from the
        BIND 9 distribution and is now available as a separate download.

	Change the default pid file location from /var/run to
	/var/run/{named,lwresd} for improved chroot/setuid support.

BIND 9.5.0

	BIND 9.5.0 has a number of new features over 9.4,
	including:

	GSS-TSIG support (RFC 3645).

	DHCID support.

	Experimental http server and statistics support for named via xml.

	More detailed statistics counters including those supported in BIND 8.

	Faster ACL processing.

	Use Doxygen to generate internal documentation.

        Efficient LRU cache-cleaning mechanism.

        NSID support.

BIND 9.4.0

	BIND 9.4.0 has a number of new features over 9.3,
	including:

	Implemented "additional section caching (or acache)", an
	internal cache framework for additional section content to
	improve response performance.  Several configuration options
	were provided to control the behavior.

	New notify type 'master-only'.  Enable notify for master
	zones only.

	Accept 'notify-source' style syntax for query-source.

	rndc now allows addresses to be set in the server clauses.

	New option "allow-query-cache".  This lets "allow-query"
	be used to specify the default zone access level rather
	than having to have every zone override the global value.
	"allow-query-cache" can be set at both the options and view
	levels.  If "allow-query-cache" is not set then "allow-recursion"
	is used if set, otherwise "allow-query" is used if set
	unless "recursion no;" is set in which case "none;" is used,
	otherwise the default (localhost; localnets;) is used.

	rndc: the source address can now be specified.

	ixfr-from-differences now takes master and slave in addition
	to yes and no at the options and view levels.

	Allow the journal's name to be changed via named.conf.

	'rndc notify zone [class [view]]' resend the NOTIFY messages
	for the specified zone.

	'dig +trace' now randomly selects the next servers to try.
	Report if there is a bad delegation.

	Improve check-names error messages.

	Make public the function to read a key file, dst_key_read_public().

	dig now returns the byte count for axfr/ixfr.
			
	allow-update is now settable at the options / view level.

	named-checkconf now checks the logging configuration.

	host now can turn on memory debugging flags with '-m'.

	Don't send notify messages to self.

	Perform sanity checks on NS records which refer to 'in zone' names.

	New zone option "notify-delay".  Specify a minimum delay
	between sets of NOTIFY messages.

	Extend adjusting TTL warning messages.

	Named and named-checkzone can now both check for non-terminal
	wildcard records.

	"rndc freeze/thaw" now freezes/thaws all zones.

	named-checkconf now check acls to verify that they only
	refer to existing acls.

	The server syntax has been extended to support a range of
	servers.

	Report differences between hints and real NS rrset and
	associated address records.

	Preserve the case of domain names in rdata during zone
	transfers.

	Restructured the data locking framework using architecture
	dependent atomic operations (when available), improving
	response performance on multi-processor machines significantly.
	x86, x86_64, alpha, powerpc, and mips are currently supported.

	UNIX domain controls are now supported.

	Add support for additional zone file formats for improving
	loading performance.  The masterfile-format option in
	named.conf can be used to specify a non-default format.  A
	separate command named-compilezone was provided to generate
	zone files in the new format.  Additionally, the -I and -O
	options for dnssec-signzone specify the input and output
	formats.

	dnssec-signzone can now randomize signature end times
	(dnssec-signzone -j jitter).

	Add support for CH A record.

	Add additional zone data constancy checks.  named-checkzone
	has extended checking of NS, MX and SRV record and the hosts
	they reference.  named has extended post zone load checks.
	New zone options: check-mx and integrity-check.


	edns-udp-size can now be overridden on a per server basis.

	dig can now specify the EDNS version when making a query.

	Added framework for handling multiple EDNS versions.

	Additional memory debugging support to track size and mctx
	arguments.

	Detect duplicates of UDP queries we are recursing on and
	drop them.  New stats category "duplicates".

	"USE INTERNAL MALLOC" is now runtime selectable.

	The lame cache is now done on a <qname,qclass,qtype> basis
	as some servers only appear to be lame for certain query
	types.

	Limit the number of recursive clients that can be waiting
	for a single query (<qname,qtype,qclass>) to resolve.  New
	options clients-per-query and max-clients-per-query.

	dig: report the number of extra bytes still left in the
	packet after processing all the records.

	Support for IPSECKEY rdata type.

	Raise the UDP recieve buffer size to 32k if it is less than 32k.

	x86 and x86_64 now have seperate atomic locking implementations.

	named-checkconf now validates update-policy entries.

	Attempt to make the amount of work performed in a iteration
	self tuning.  The covers nodes clean from the cache per
	iteration, nodes written to disk when rewriting a master
	file and nodes destroyed per iteration when destroying a
	zone or a cache.

	ISC string copy API.

	Automatic empty zone creation for D.F.IP6.ARPA and friends.
	Note: RFC 1918 zones are not yet covered by this but are
	likely to be in a future release.

	New options: empty-server, empty-contact, empty-zones-enable
	and disable-empty-zone.

	dig now has a '-q queryname' and '+showsearch' options.

	host/nslookup now continue (default)/fail on SERVFAIL.

	dig now warns if 'RA' is not set in the answer when 'RD'
	was set in the query.  host/nslookup skip servers that fail
	to set 'RA' when 'RD' is set unless a server is explicitly
	set.

	Integrate contibuted DLZ code into named.

	Integrate contibuted IDN code from JPNIC.

	libbind: corresponds to that from BIND 8.4.7.

BIND 9.3.0

	BIND 9.3.0 has a number of new features over 9.2,
	including:

	DNSSEC is now DS based (RFC 3658).
	See also RFC 3845, doc/draft/draft-ietf-dnsext-dnssec-*.

	DNSSEC lookaside validation.

	check-names is now implemented.
	rrset-order in more complete.

	IPv4/IPv6 transition support, dual-stack-servers.

	IXFR deltas can now be generated when loading master files,
	ixfr-from-differences.

	It is now possible to specify the size of a journal, max-journal-size.

	It is now possible to define a named set of master servers to be
	used in masters clause, masters.

	The advertised EDNS UDP size can now be set, edns-udp-size.

	allow-v6-synthesis has been obsoleted.

	NOTE:
	* Zones containing MD and MF will now be rejected.
	* dig, nslookup name. now report "Not Implemented" as
	  NOTIMP rather than NOTIMPL.  This will have impact on scripts
	  that are looking for NOTIMPL.

	libbind: corresponds to that from BIND 8.4.5.

BIND 9.2.0

	BIND 9.2.0 has a number of new features over 9.1,
	including:

	  - The size of the cache can now be limited using the
            "max-cache-size" option.

	  - The server can now automatically convert RFC1886-style
	    recursive lookup requests into RFC2874-style lookups, 
	    when enabled using the new option "allow-v6-synthesis".
            This allows stub resolvers that support AAAA records
            but not A6 record chains or binary labels to perform
            lookups in domains that make use of these IPv6 DNS
            features.

	  - Performance has been improved.

	  - The man pages now use the more portable "man" macros
	    rather than the "mandoc" macros, and are installed
            by "make install".

          - The named.conf parser has been completely rewritten.
            It now supports "include" directives in more
            places such as inside "view" statements, and it no
            longer has any reserved words.

          - The "rndc status" command is now implemented.

	  - rndc can now be configured automatically.

	  - A BIND 8 compatible stub resolver library is now
	    included in lib/bind.

	  - OpenSSL has been removed from the distribution.  This
	    means that to use DNSSEC, OpenSSL must be installed and
	    the --with-openssl option must be supplied to configure.
	    This does not apply to the use of TSIG, which does not
	    require OpenSSL.

	  - The source distribution now builds on Windows.
	    See win32utils/readme1.txt and win32utils/win32-build.txt
	    for details.

	This distribution also includes a new lightweight stub
	resolver library and associated resolver daemon that fully
	support forward and reverse lookups of both IPv4 and IPv6
	addresses.  This library is considered experimental and
	is not a complete replacement for the BIND 8 resolver library.
	Applications that use the BIND 8 res_* functions to perform
	DNS lookups or dynamic updates still need to be linked against
	the BIND 8 libraries.  For DNS lookups, they can also use the
	new "getrrsetbyname()" API.

	BIND 9.2 is capable of acting as an authoritative server
	for DNSSEC secured zones.  This functionality is believed to
	be stable and complete except for lacking support for
	verifications involving wildcard records in secure zones.

	When acting as a caching server, BIND 9.2 can be configured
	to perform DNSSEC secure resolution on behalf of its clients.
	This part of the DNSSEC implementation is still considered
	experimental.  For detailed information about the state of the
	DNSSEC implementation, see the file doc/misc/dnssec.

	There are a few known bugs:

		On some systems, IPv6 and IPv4 sockets interact in
		unexpected ways.  For details, see doc/misc/ipv6.
		To reduce the impact of these problems, the server
		no longer listens for requests on IPv6 addresses
		by default.  If you need to accept DNS queries over
		IPv6, you must specify "listen-on-v6 { any; };"
		in the named.conf options statement.

		FreeBSD prior to 4.2 (and 4.2 if running as non-root)
		and OpenBSD prior to 2.8 log messages like
		"fcntl(8, F_SETFL, 4): Inappropriate ioctl for device".
		This is due to a bug in "/dev/random" and impacts the
		server's DNSSEC support.

		OS X 10.1.4 (Darwin 5.4), OS X 10.1.5 (Darwin 5.5) and
		OS X 10.2 (Darwin 6.0) reports errors like
		"fcntl(3, F_SETFL, 4): Operation not supported by device".
		This is due to a bug in "/dev/random" and impacts the
		server's DNSSEC support.

		--with-libtool does not work on AIX.

	A bug in some versions of the Microsoft DNS server can cause zone
        transfers from a BIND 9 server to a W2K server to fail.  For details,
	see the "Zone Transfers" section in doc/misc/migration.

	For a detailed list of user-visible changes from
	previous releases, see the CHANGES file.


Building

	BIND 9 currently requires a UNIX system with an ANSI C compiler,
	basic POSIX support, and a 64 bit integer type.

	We've had successful builds and tests on the following systems:

		COMPAQ Tru64 UNIX 5.1B
		Fedora Core 6
		FreeBSD 4.10, 5.2.1, 6.2
		HP-UX 11.11
		Mac OS X 10.5
		NetBSD 3.x and 4.0-beta
		OpenBSD 3.3 and up
		Solaris 8, 9, 9 (x86), 10
		Ubuntu 7.04, 7.10
		Windows XP/2003/2008

        NOTE:  As of BIND 9.5.1, 9.4.3, and 9.3.6, older versions of
        Windows, including Windows NT and Windows 2000, are no longer
        supported.

	We have recent reports from the user community that a supported
	version of BIND will build and run on the following systems:

		AIX 4.3, 5L
		CentOS 4, 4.5, 5
		Darwin 9.0.0d1/ARM
		Debian 4
		Fedora Core 5, 7
		FreeBSD 6.1
		HP-UX 11.23 PA
		MacOS X 10.4, 10.5
		Red Hat Enterprise Linux 4, 5
		SCO OpenServer 5.0.6
		Slackware 9, 10
		SuSE 9, 10

	To build, just

		./configure
		make

	Do not use a parallel "make".

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

	    CC
		The C compiler to use.	configure tries to figure
		out the right one for supported systems.

	    CFLAGS
		C compiler flags.  Defaults to include -g and/or -O2
		as supported by the compiler.  

	    STD_CINCLUDES
		System header file directories.	 Can be used to specify
		where add-on thread or IPv6 support is, for example.
		Defaults to empty string.

	    STD_CDEFINES
		Any additional preprocessor symbols you want defined.
		Defaults to empty string.

		Possible settings:
		Change the default syslog facility of named/lwresd.
		  -DISC_FACILITY=LOG_LOCAL0	
		Enable DNSSEC signature chasing support in dig.
		  -DDIG_SIGCHASE=1 (sets -DDIG_SIGCHASE_TD=1 and
				    -DDIG_SIGCHASE_BU=1)
		Disable dropping queries from particular well known ports.
		  -DNS_CLIENT_DROPPORT=0
	        Sibling glue checking in named-checkzone is enabled by default.
		To disable the default check set.  -DCHECK_SIBLING=0
		named-checkzone checks out-of-zone addresses by default.
		To disable this default set.  -DCHECK_LOCAL=0
		To create the default pid files in ${localstatedir}/run rather
		than ${localstatedir}/run/{named,lwresd}/ set.
		  -DNS_RUN_PID_DIR=0
		Enable workaround for Solaris kernel bug about /dev/poll
		  -DISC_SOCKET_USE_POLLWATCH=1
		  The watch timeout is also configurable, e.g.,
		  -DISC_SOCKET_POLLWATCH_TIMEOUT=20

	    LDFLAGS
		Linker flags. Defaults to empty string.

	The following need to be set when cross compiling.

	    BUILD_CC
		The native C compiler.
	    BUILD_CFLAGS (optional)
	    BUILD_CPPFLAGS (optional)
		Possible Settings:
		-DNEED_OPTARG=1		(optarg is not declared in <unistd.h>)
	    BUILD_LDFLAGS (optional)
	    BUILD_LIBS (optional)

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

	For the server to support DNSSEC, you need to build it
	with crypto support.  You must have OpenSSL 0.9.5a
	or newer installed and specify "--with-openssl" on the
	configure command line.  If OpenSSL is installed under
	a nonstandard prefix, you can tell configure where to
	look for it using "--with-openssl=/prefix".

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

	On some platforms, BIND 9 can be built with multithreading
	support, allowing it to take advantage of multiple CPUs.
	You can specify whether to build a multithreaded BIND 9 
	by specifying "--enable-threads" or "--disable-threads"
	on the configure command line.  The default is operating
	system dependent.

        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.
        The default 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".

	To see additional configure options, run "configure --help".
	Note that the help message does not reflect the BIND 8 
	compatibility defaults for sysconfdir and localstatedir.

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

	If you need to re-run configure please run "make distclean" first.
	This will ensure that all the option changes take.

	Building with gcc is not supported, unless gcc is the vendor's usual
	compiler (e.g. the various BSD systems, Linux).
	
	Known compiler issues:
	* gcc-3.2.1 and gcc-3.1.1 is known to cause problems with solaris-x86.
	* gcc prior to gcc-3.2.3 ultrasparc generates incorrect code at -02.
	* gcc-3.3.5 powerpc generates incorrect code at -02.
	* Irix, MipsPRO 7.4.1m is known to cause problems.

	A limited test suite can be run with "make test".  Many of
	the tests require you to configure a set of virtual IP addresses
	on your system, and some require Perl; see bin/tests/system/README
	for details.

	SunOS 4 requires "printf" to be installed to make the shared
	libraries.  sh-utils-1.16 provides a "printf" which compiles
	on SunOS 4.

Documentation

	The BIND 9 Administrator Reference Manual is included with the
	source distribution in DocBook XML and HTML 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.
	There is now also a set of man pages for the lwres library.

	If you are upgrading from BIND 8, please read the migration
	notes in doc/misc/migration.  If you are upgrading from
	BIND 4, read doc/misc/migration-4to9.

	Frequently asked questions and their answers can be found in
	FAQ.


Bug Reports and Mailing Lists

	Bugs reports should be sent to

		bind9-bugs@isc.org

	To join the BIND Users mailing list, send mail to

		bind-users-request@isc.org

	archives of which can be found via

		http://www.isc.org/ops/lists/

	If you're planning on making changes to the BIND 9 source
	code, you might want to join the BIND Workers mailing list.
	Send mail to

		bind-workers-request@isc.org