Introduction

   BIND 9.9.6rc1 is the first release candidate for BIND 9.9.6, an
   Extended Support Version (ESV) of BIND 9.

   This document summarizes feature changes from BIND 9.9.5 to BIND
   9.9.6rc1.  Entries marked with (**) indicate changes since 9.9.6b2

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

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 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

   Support for CAA record types, as described in RFC 6844 "DNS
   Certification Authority Authorization (CAA) Resource Record",
   was added. [RT#36625] [RT #36737]

   Disallow "request-ixfr" from being specified in zone statements
   where it is not valid (it is only valid for slave and redirect
   zones) [RT #36608]

   Support for CDS and CDNSKEY resource record types was added. For
   details see the proposed Informational Internet-Draft "Automating
   DNSSEC Delegation Trust Maintenance" at
   http://tools.ietf.org/html/draft-ietf-dnsop-delegation-trust-maintainance-14.
   [RT #36333]

   Added version printing options to various BIND utilities. [RT #26057]
   [RT #10686]

   On Windows, enable the Python tools "dnssec-coverage" and
   "dnssec-checkds". [RT #34355]

   Added a "no-case-compress" ACL, which causes named to use
   case-insensitive compression (disabling change #3645) 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.) [RT #35300]

Feature Changes

   Adds RPZ SOA to the additional section of responses to clearly
   indicate the use of RPZ in a manner that is intended to avoid
   causing issues for downstream resolvers and forwarders [RT #36507]

   rndc now gives distinct error messages when an unqualified zone
   name matches multiple views vs. matching no views [RT #36691]

   Improves the accuracy of dig's reported round trip times.  [RT #36611]

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

   When an SPF record exists in a zone but no equivalent TXT record
   does, a warning will be issued.  The warning for the reverse
   condition is no longer issued. See the check-spf option in the
   documentation for details. [RT #36210]

   "named" will now log explicitly when using rndc.key to configure
   command channel. [RT #35316]

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

   Aging of smoothed round-trip time measurements is now limited
   to no more than once per second, to improve accuracy in selecting
   the best name server. [RT #32909]

   DNSSEC keys that have been marked active but have no publication
   date are no longer presumed to be publishable. [RT #35063]

Bug Fixes

   When resigning, dnssec-signzone was removing all signatures from
   delegation nodes. It now retains DS and (if applicable) NSEC
   signatures.  [RT #36946] (**)

   The AD flag was being set inappopriately on RPZ responses. [RT #36833] (**)

   Updates the URI record type to current draft standard,
   draft-faltstrom-uri-08, and allows the value field to be zero
   length [RT #36642] [RT #36737]

   RRSIG sets that were not loaded in a single transaction at start
   up were not being correctly added to re-signing heaps.  [RT #36302]

   Setting '-t aaaa' in .digrc had unintended side-effects. [RT #36452]

   A race condition could cause a crash in isc_event_free during
   shutdown.  [RT #36720]

   Addresses a race condition issue in dispatch. [RT #36731]

   acl elements could be miscounted, causing a crash while loading
   a config [RT #36675]

   Corrects a deadlock between view.c and adb.c. [RT #36341]

   liblwres wasn't properly handling link-local addresses in
   nameserver clauses in resolv.conf. [RT #36039]

   Buffers in isc_print_vsnprintf were not properly initialized
   leading to potential overflows when printing out quad values.
   [RT #36505]

   Don't call qsort() with a null pointer, and disable the GCC 4.9
   "delete null pointer check" optimizer option. This fixes problems
   when using GNU GCC 4.9.0 where its compiler code optimizations
   may cause crashes in BIND. For more information, see the operational
   advisory at https://kb.isc.org/article/AA-01167/. [RT #35968]

   Fixed a bug that could cause repeated resigning of records in
   dynamically signed zones. [RT #35273]

   Fixed a bug that could cause an assertion failure after forwarding
   was disabled. [RT #35979]

   Fixed a bug that caused SERVFAILs when using RPZ on a system
   configured as a forwarder. [RT #36060]

   Worked around a limitation in Solaris's /dev/poll implementation
   that could cause named to fail to start when configured to use
   more sockets than the system could accomodate. [RT #35878]

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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