bind9/doc/notes/notes-current.rst
2021-01-26 12:38:32 +01:00

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Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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 9.16.12
----------------------
Security Fixes
~~~~~~~~~~~~~~
- None.
Known Issues
~~~~~~~~~~~~
- None.
New Features
~~~~~~~~~~~~
- When a secondary server receives a large incremental zone
transfer (IXFR), it can have a negative impact on query
performance while the incremental changes are applied to
the zone. To address this, ``named`` can now
limit the size of IXFR responses it sends in response to zone
transfer requests. If an IXFR response would be larger than an
AXFR of the entire zone, it will send an AXFR resonse instead.
This behavior is controlled by the ``max-ixfr-ratio``
option - a percentage value representing the ratio of IXFR size
to the size of a full zone transfer. This value cannot exceed
100%, which is also the default. [GL #1515]
Removed Features
~~~~~~~~~~~~~~~~
- None.
Feature Changes
~~~~~~~~~~~~~~~
- The SONAMEs for BIND 9 libraries now include the current BIND 9
version number, in an effort to tightly couple internal libraries with
a specific release. This change makes the BIND 9 release process both
simpler and more consistent while also unequivocally preventing BIND 9
binaries from silently loading wrong versions of shared libraries (or
multiple versions of the same shared library) at startup. [GL #2387]
- The default value of ``max-stale-ttl`` has been changed from 12 hours to 1
day and the default value of ``stale-answer-ttl`` has been changed from 1
second to 30 seconds, following RFC 8767 recommendations. [GL #2248]
- As part of an ongoing effort to use RFC 8499 terminology,
``primaries`` can now be used as a synonym for ``masters`` in
``named.conf``. Similarly, ``notify primary-only`` can now be used as
a synonym for ``notify master-only``. The output of ``rndc
zonestatus`` now uses ``primary`` and ``secondary`` terminology.
[GL #1948]
Bug Fixes
~~~~~~~~~
- KASP incorrectly set signature validity to the value of the DNSKEY signature
validity. This is now fixed. [GL #2383]