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.. Copyright (C) Internet Systems Consortium, Inc. ("ISC")
..
.. SPDX-License-Identifier: MPL-2.0
..
.. This Source Code Form is subject to the terms of the Mozilla Public
.. License, v. 2.0. If a copy of the MPL was not distributed with this
.. file, you can obtain one at https://mozilla.org/MPL/2.0/.
..
.. See the COPYRIGHT file distributed with this work for additional
.. information regarding copyright ownership.
Notes for BIND 9.16.19
----------------------
New Features
~~~~~~~~~~~~
- Using a new configuration option, ``parental-agents``, each zone can
now be associated with a list of servers that can be used to check the
DS RRset in the parent zone. This enables automatic KSK rollovers.
:gl:`#1126`
Feature Changes
~~~~~~~~~~~~~~~
- IP fragmentation has been disabled for outgoing UDP sockets. Errors
triggered by sending DNS messages larger than the specified path MTU
are properly handled by sending empty DNS replies with the ``TC``
(TrunCated) bit set, which forces DNS clients to fall back to TCP.
:gl:`#2790`
Bug Fixes
~~~~~~~~~
- The code managing :rfc:`5011` trust anchors created an invalid
placeholder keydata record upon a refresh failure, which prevented the
database of managed keys from subsequently being read back. This has
been fixed. :gl:`#2686`
- Signed, insecure delegation responses prepared by ``named`` either
lacked the necessary NSEC records or contained duplicate NSEC records
when both wildcard expansion and CNAME chaining were required to
prepare the response. This has been fixed. :gl:`#2759`
- If ``nsupdate`` sends an SOA request and receives a REFUSED response,
it now fails over to the next available server. :gl:`#2758`
- A bug that caused the NSEC3 salt to be changed on every restart for
zones using KASP has been fixed. :gl:`#2725`
- The configuration-checking code failed to account for the inheritance
rules of the ``dnssec-policy`` option. This has been fixed.
:gl:`#2780`
- The fix for :gl:`#1875` inadvertently introduced a deadlock: when
locking key files for reading and writing, the ``in-view`` logic was
not considered. This has been fixed. :gl:`#2783`
- A race condition could occur where two threads were competing for the
same set of key file locks, leading to a deadlock. This has been
fixed. :gl:`#2786`
Known Issues
~~~~~~~~~~~~
- There are no new known issues with this release. See :ref:`above
<relnotes_known_issues>` for a list of all known issues affecting this
BIND 9 branch.
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