Introduction

   BIND 9.10.0b1 is the first beta development release of BIND 9.10,
   a new branch of BIND 9.

   This document summarizes features added or significantly changed
   since the previous major release, BIND 9.9. Items that were not
   in the previous development release, BIND 9.10.0a2, are marked
   with asterisks (**). Bug fixes since the previous development
   release are also summarized.

   Please see the CHANGES file in the source code release for a
   complete list of all changes.

Download

   The latest versions of BIND 9 software can always be found on
   our web site at http://www.isc.org/downloads/. There you will
   find additional information about each release, source code, and
   pre-compiled versions for Microsoft Windows operating systems.

Support

   Professional support is provided by Internet Systems Consortium,
   Inc., doing business as DNSco.  Information about paid support
   options is available at http://www.dns-co.com/solutions/.  Free
   support is provided by our user community via a mailing list.
   Information on all public email lists is available at
   https://www.isc.org/community/mailing-list/.

New Features

   DNS Response-rate limiting (DNS RRL), which blunts the impact
   of reflection and amplification attacks, is always compiled in
   and no longer requires a compile-time option to enable it.

   An experimental "Source Identity Token" (SIT) EDNS option is now
   available.  Similar to DNS Cookies (as invented by Donald Eastlake
   III and described in draft-eastlake-dnsext-cookies-04), these
   are designed to enable clients to detect off-path spoofed
   responses, and to enable servers to detect spoofed-source queries.
   Servers can be configured to send smaller responses to clients
   that have not identified themselves using a SIT option, reducing
   the effectiveness of amplification attacks.  RRL processing has
   also been updated: clients proven to be legitimate via SIT are
   not subject to rate limiting.  Use "configure --enable-sit" to
   enable this feature in BIND 9.  [RT #35389]  **

   A new zone file format, "map", stores zone data in a format that
   can be mapped directly into memory, allowing significantly faster
   zone loading. [RT #25419]

   "delve" (domain entity lookup and validation engine) is a new
   tool with dig-like semantics for looking up DNS data and performing
   internal DNSSEC validation.  This allows easy validation in
   environments where the resolver may not be trustworthy, and
   assists with troubleshooting of DNSSEC problems. (Note: not yet
   available on Windows.) [RT #32406] **

   The new "prefetch" option can improve recursive resolver
   performance: when it is in use, cache records that are still
   being requested by clients will automatically be refreshed from
   the authoritative server before they expire, reducing or eliminating
   the time window in which no answer is available in the cache.
   [RT #35041]

   Improved EDNS processing allows better resolver performance and
   reliability over slow or lossy connections. [RT #30655]

   Substantial improvements have been made in response-policy zone
   (RPZ) performance.  Up to 32 response-policy zones can now be
   configured.  Performance loss due to adding additional RPZs is
   minimal.

   RPZ now allows response policies to be configured based on the
   IP address of the client.

   ACLs can now be specified based on geographic location using the
   MaxMind GeoIP databases. Use "configure --with-geoip" to enable
   this feature in BIND 9. Thanks to Ken Brownfield for the
   contribution. [RT #30681]

   The version 3 XML schema for the statistics channel, including
   new statistics and a flattened XML tree for faster parsing, is
   no longer optional. The version 2 XML schema is now deprecated.
   [RT #30023]

   Improvements have been made to the XSL stylesheet used for XML
   statistics: The stylesheet can now be cached by the browser;
   section headers are omitted when the sections have no data to
   display; counter readability has been improved. Also, broken-out
   subgroups of XML statistics (server, zones, net, tasks, mem, and
   status) can now be requested. Thanks to Timothe Litt for the
   assistance.  [RT #35115] [RT #35117]

   The statistics channel can now provide data in JSON format as
   well as XML.

   Per-zone stats counters have been added to track TCP and UDP
   queries. [RT #35375] **

   Server-wide stats counters have been added to track EDNS options
   received. [RT #35447] **

   The new "in-view" zone option allows zone data to be shared
   between views, so that multiple views can serve the same zones
   authoritatively without storing multiple copies in memory. [RT #32968]

   A new compile-time option, "configure --enable-native-pkcs11",
   allows the BIND 9 cryptography functions to use the PKCS#11 API
   natively, so that BIND can drive a cryptographic hardware service
   module (HSM) directly instead of using a modified OpenSSL as an
   intermediary.  This has been tested with the Thales nShield HSM
   and with SoftHSMv2 from the OpenDNSSEC project. [RT #29031]

   When re-signing a zone, the new "dnssec-signzone -Q" option drops
   signatures from keys that are still published but are no longer
   active. Thanks to Pierre Beyssac for the contribution.  [RT #34990]

   New options have been added to "dnssec-coverage": -z and -k
   indicate whether to limit coverage checks to ZSK's or KSK's, and
   -l limits coverage checking to a specified duration.  Thanks to
   Peter Palfrader for the contribution. [RT #35168]

   "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. [RT #34465]

   Added a "no-case-compress" ACL, which causes "named" to use
   case-insensitive compression for specified clients. This is
   useful when dealing with broken client implementations that use
   case-sensitive name comparisons, rejecting responses that fail
   to match the capitalization of the query that was sent.

   "named" now preserves the capitalization of names when responding
   to queries: for instance, a query for "example.com" may be
   answered with "example.COM" if the name was configured that way
   in the zone file.  Some clients have a bug causing them to depend
   on the older behavior, in which the case of the answer always
   matched the case of the query, rather than the case of the name
   configured in the DNS.  Such clients can now be specified in the
   new "no-case-compress" ACL; this will restore the older behavior
   of "named" for those clients only. [RT #35300] **

   On operating systems that support routing sockets, including Mac
   OSX, *BSD and Linux, network interfaces are re-scanned automatically
   whenever they change.  Use "automatic-interface-scan no;" to
   disable this feature. [RT #23027] **

   Added "rndc scan" to trigger an interface scan manually. [RT #23027] **

   A new compile-time option, "configure --with-tuning=3Dlarge", tunes
   various compiled-in constants and default settings to values
   suited to large servers with abundant memory. This can improve
   performance on such servers, but will consume more memory and
   may degrade performance on smaller systems. [RT #29538] **

   The new "max-zone-ttl" option enforces maximum TTLs for zones.
   If loading a zone containing a higher TTL, the load fails. DDNS
   updates with higher TTLs are accepted but the TTL is truncated.
   (Note: Currently supported for master zones only; inline-signing
   slaves will be added.) [RT #38405] **

   Added a new "dig +subnet" option to send an EDNS CLIENT-SUBNET
   option (as described in draft-vandergaast-edns-client-subnet-02)
   containing the specified address/prefix when querying. Thanks
   to Wilmer van der Gaast for the contribution. [RT #35415] **

   Partially implemented the EDNS EXPIRE option (as described in
   draft-andrews-dnsext-expire-00).  "dig +expire" sends an EXPIRE
   option when querying.  When this option is sent with an SOA query
   to a slave zone running on a server that supports the option,
   the response will report the time until the slave zone expires.
   EXPIRE uses an experimental option code (65002), which is subject
   to change when a permanent code is assigned by IANA. [RT #35416] **

   Multiple DLZ databases can now be configured, and are searched
   in order to find one that can answer an incoming query.  Individual
   zones can now be configured to be served from a specific DLZ
   database.  DLZ databases can serve zones of type "master" and
   "redirect".

   "named-checkzone" and "named-compilezone" can now read journal
   files, allowing them to process dynamic zones without the zones
   needing to be frozen first.

   The "rndc" command now supports new key algorithms in addition
   to HMAC-MD5, including HMAC-SHA1, -SHA224, -SHA256, -SHA384, and
   -SHA512.  The -A option to rndc-confgen can be used to select
   the algorithm for the generated key. (The default is still
   HMAC-MD5; this may change in a future release.) [RT #20363]

   The internal and export versions of the BIND libraries (libisc,
   libdns, etc) have been unified so that external library clients
   can use the same libraries as BIND itself. [RT #33131]

   Added a "Configure" script for Windows to simplify enabling or
   disabling optional features. All versions of Visual Studio up
   to 2013 are now supported, and support has been added for 64-bit
   builds. Zip files containing pre-compiled 64-bit versions of
   BIND 9 are now included with releases. [RT #34160] **

   "rndc zonestatus" reports information about a specified zone.

   "named" now listens on IPv6 as well as IPv4 interfaces by default.

Feature Changes

   The default setting for the -U option (setting the number of UDP
   listeners per interface) has been adjusted to improve performance.
   [RT #35417] **

   Updated zkt and nslint in the contrib directory to the newest
   versions: zkt 1.1.2 and nslint-3.0a2. **

   The isc_bitstring API is no longer used and has been removed
   from the libisc library. [RT #35284] **

   The word "never" can now be used as a synonym for "none" when
   configuring key event dates in the dnssec tools.  [RT #35277]
   **

   The new libiscpk11 library, introduced in the previous development
   release to support native PKCS#11, has been merged into libisc
   to simplify dependencies. [RT #35205] **

   Documentation of native PKCS#11 has been expanded, specifically
   to describe the new pkcs11: URI format used in key labels. [RT #35287] *=
*

   The Windows installer now places files in the Program Files area
   rather than system services. [RT #35361] **

   The timestamps included in RRSIG records can now be read as
   integers indicating the number of seconds since the UNIX epoch,
   in addition to being read as formatted dates in YYYYMMDDHHMMSS
   format. [RT #35185]

   The irs_resconf_load() function, used for reading /etc/resolv.conf,
   now returns ISC_R_FILENOTFOUND when the file is missing or
   unreadable.  However, it will still initialize an irs_resconf
   structure as if the file had been configured with nameservers
   at the IPv4 and IPv6 localhost addresses.  Existing code that
   uses irs_resconf_load() will need to be updated to treat
   ISC_R_FILENOTFOUND as a qualified success, or it may leak memory
   due to treating the result as a failure even though an irs_resconf
   structure was allocated; see CHANGES for sample C code that
   implements the correct behavior [RT #35194]

Bug Fixes

   "dnssec-keygen" could set the publication date incorrectly when
   only the activation date was specified on the command line. [RT #35278]

   Fixed a type mismatch causing the ODBC DLZ driver to dump core
   on 64-bit systems. [RT #35324]

   Improved building with libtool. [RT #35314]

   When a server is specified by name in "nsupdate", all addresses
   for that name will be tried before giving up.  Previously, if
   the first address for the server name was not reachable the
   update would fail. [RT #25784]

   Fixed an assertion failure caused by using "rndc retransfer"
   with inline-signing zones. [RT #35353]

   Fixed a build failure from using "./configure --enable-openssl-hash".
   [RT #35343]

   The "delegation-only" flag now works in zones of type "forward".
   (This had previously been documented to work, but this was
   actually rejected by the configuration parser.)  [RT #35392]

   Fixed a race condition which could lead to a core dump when
   destroying a resolver fetch object. [RT #35385]

   Addressed a potential REQUIRE failure that could occur when
   printing out an rdataset using a format that includes comment
   data.

   The "allow-notify" ACL formerly ignored TSIG keys; this has been
   corrected. [RT #35425]

   Fixed an uninitialized pointer in log.c that could potentially
   have caused a core dump on some platforms. [RT #35260]

Thank You

   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 http://www.isc.org/donate/.

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