Dear Knot Resolver users,
Knot Resolver 5.2.0 has been released!
One of the notable features is a new DNS-over-HTTTPS implementation
which is more scalable and stable than the old one. It also has less
dependencies and simpler configuration.
Another new feature is experimental eXpress Data Path (XDP) support for
UDP. With support from both the network card and the kernel, it can
provide superior performance and lower latency for UDP answers.
Some of the improvements and bugfixes required a few backward
incompatible changes, mainly regarding control sockets or module API.
Please refer to our upgrading guide for details:
https://knot-resolver.readthedocs.io/en/v5.2.0/upgrading.html#to-5-2
Improvements
------------
- doh2: add native C module for DNS-over-HTTPS (#600, !997)
- xdp: add server-side XDP support for higher UDP performance (#533,
!1083)
- lower default EDNS buffer size to 1232 bytes (#538, #300, !920);
see https://dnsflagday.net/2020/
- net: split the EDNS buffer size into upstream and downstream (!1026)
- lua-http doh: answer to /dns-query endpoint as well as /doh (!1069)
- improve resiliency against UDP fragmentation attacks (disable PMTUD)
(!1061)
- ta_update: warn if there are differences between statically configured
keys and upstream (#251, !1051)
- human readable output in interactive mode was improved (!1020)
- doc: generate info page (!1079)
- packaging: improve sysusers and tmpfiles support (!1080)
Bugfixes
--------
- avoid an assert() error in stash_rrset() (!1072)
- fix emergency cache locking bug introduced in 5.1.3 (!1078)
- migrate map() command to control sockets; fix systemd integration
(!1000)
- fix crash when sending back errors over control socket (!1000)
- fix SERVFAIL while processing forwarded CNAME to a sibling zone (#614,
!1070)
Incompatible changes
--------------------
- see upgrading guide:
https://knot-resolver.readthedocs.io/en/v5.2.0/upgrading.html#to-5-2
- minor changes in module API
- control socket API commands have to be terminated by "\n"
- graphite: default prefix now contains instance identifier (!1000)
- build: meson >= 0.49 is required (!1082)
- planned changes in future versions:
https://knot-resolver.readthedocs.io/en/v5.2.0/upgrading.html#upcoming-chan…
Full changelog:
https://gitlab.nic.cz/knot/knot-resolver/raw/v5.2.0/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-5.2.0.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-5.2.0.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v5.2.0/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Dear Knot Resolver users,
we would like to inform you about certain changes in upcoming Knot Resolver 5.2.0:
- - Users of Control sockets API need to terminate each command sent to resolver with newline character (ASCII \n). Correct usage: "cache.stats()\n". Newline terminated commands are accepted by all resolver versions >= 1.0.0.
- - Human readable output from Control sockets is not stable and changes from time to time. Users who need machine readable output for scripts should use Lua function "tojson()" to convert Lua values into standard JSON format instead of attempting to parse the human readable output. For example API call "tojson(cache.stats())\n" will return JSON string with "cache.stats()" results represented as dictionary. Function "tojson()" is available in all resolver versions >= 1.0.0.
- - DoH served with http module DNS-over-HTTP (DoH) will be marked as legacy and won’t receive any more bugfixes. A more reliable and scalable DoH module will be available instead. The new DoH module will only support HTTP/2 over TLS.
- - New releases since October 2020 will contain changes for DNS Flag Day 2020. Please double-check your firewall, it has to allow DNS traffic on UDP and also TCP port 53. See https://dnsflagday.net/2020/ for more information.
This text with links to further documentation can be found here:
https://knot-resolver.readthedocs.io/en/latest/upgrading.html#upcoming-chan…
We plan to use the same URL to publish planned changes in not-yet-released versions.
To make our version numbers easier to understand we have documented how we version new releases:
https://knot-resolver.readthedocs.io/en/latest/NEWS.html#version-numbering
Feedback is more than welcome. Do not hesitate to reach out on the usual channels:
https://www.knot-resolver.cz/support/
- --
Petr Špaček @ CZ.NIC
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Dear Knot Resolver users,
Knot Resolver 5.1.3 has been released!
Improvements
------------
- capabilities are no longer constrained when running as root (!1012)
- cache: add percentage usage to cache.stats() (#580, !1025)
- cache: add number of cache entries to cache.stats() (#510, !1028)
- aarch64 support again, as some systems still didn't work (!1033)
- support building against Knot DNS 3.0 (!1053)
Bugfixes
--------
- tls: fix compilation to support net.tls_sticket_secret() (!1021)
- validator: ignore bogus RRSIGs present in insecure domains (!1022,
#587)
- build if libsystemd version isn't detected as integer (#592, !1029)
- validator: more robust reaction on missing RRSIGs (#390, !1020)
- ta_update module: fix broken RFC5011 rollover (!1035)
- garbage collector: avoid keeping multiple copies of cache (!1042)
Full changelog:
https://gitlab.nic.cz/knot/knot-resolver/raw/v5.1.3/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-5.1.3.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-5.1.3.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v5.1.3/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
Dear Knot Resolver users,
Knot Resolver 5.1.0 has been released!
We also have two important announcements:
1) Ubuntu and Debian repositories
Ubuntu and Debian users have to manually set up the upstream repository
once again by following the instructions at:
https://www.knot-resolver.cz/download/
We apologize for the inconvenience, tests are now in place to prevent
this from happening again.
2) The upcoming major version will contain reworked
hints/policy/prefill/rebinding/view modules and related functionalities.
Please participate in the following survey to ensure we do not forget
about your particular use-case:
https://www.knot-resolver.cz/survey/
It will help us to improve Knot Resolver. Thank you!
Our upstream repositories now also provide packages for CentOS 8,
Ubuntu 20.04 and Fedora 32.
And finally, the release notes for version 5.1.0:
Improvements
------------
- cache garbage collector: reduce filesystem operations when idle (!946)
- policy.DEBUG_ALWAYS and policy.DEBUG_IF for limited verbose logging
(!957)
- daemon: improve TCP query latency under heavy TCP load (!968)
- add policy.ANSWER action (!964, #192)
- policy.rpz support fake A/AAAA (!964, #194)
Bugfixes
--------
- cache: missing filesystem support for pre-allocation is no longer
fatal (#549)
- lua: policy.rpz() no longer watches the file when watch is set to
false (!954)
- fix a strict aliasing problem that might've lead to "miscompilation"
(!962)
- fix handling of DNAMEs, especially signed ones (#234, !965)
- lua resolve(): correctly include EDNS0 in the virtual packet (!963)
Custom modules might have been confused by that.
- do not leak bogus data into SERVFAIL answers (#396)
- improve random Lua number generator initialization (!979)
- cache: fix CNAME caching when validation is disabled (#472, !974)
- cache: fix CNAME caching in policy.STUB mode (!974)
- prefill: fix crash caused by race condition with resolver startup
(!983)
- webmgmt: use javascript scheme detection for websockets' protocol
(#546)
- daf module: fix del(), deny(), drop(), tc(), pass() functions
(#553, !966)
- policy and daf modules: expose initial query when evaluating
postrules (#556)
- cache: fix some cases of caching answers over 4 KiB (!976)
- docs: support sphinx 3.0.0+ (!978)
Incompatible changes
--------------------
- minor changes in module API; see upgrading guide:
https://knot-resolver.readthedocs.io/en/stable/upgrading.html
Full changelog:
https://gitlab.labs.nic.cz/knot/knot-resolver/raw/v5.1.0/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-5.1.0.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-5.1.0.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v5.1.0/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
Dear Knot Resolver users,
Knot Resolver 5.0.0 has been released!
This version has a few backward incompatible changes. Most notably, the
network interface configuration has been moved back to the configuration
file and configuration via systemd sockets is no longer supported.
Unfortunately, this change requires a manual modification of your
configuration file if you've previously configured your network
interfaces via systemd sockets. Please follow the instructions printed
out during package upgrade and check out our upgrading guide:
https://knot-resolver.readthedocs.io/en/stable/upgrading.html
We apologize for the inconvenience.
Incompatible changes
--------------------
- see upgrading guide:
https://knot-resolver.readthedocs.io/en/stable/upgrading.html
- systemd sockets are no longer supported (#485)
- net.listen() throws an error if it fails to bind; use freebind option
if needed
- control socket location has changed (!922)
- -f/--forks is deprecated (#529, !919)
Improvements
------------
- logging: control-socket commands don't log unless --verbose (#528)
- use SO_REUSEPORT_LB if available (FreeBSD 12.0+)
- lua: remove dependency on lua-socket and lua-sec, used lua-http and
cqueues (#512, #521, !894)
- lua: remove dependency on lua-filesystem (#520, !912)
- net.listen(): allow binding to non-local address with freebind
option (!898)
- cache: pre-allocate the file to avoid SIGBUS later (not macOS;
!917, #525)
- lua: be stricter around nonsense returned from modules (!901)
- user documentation was reorganized and extended (!900, !867)
- multiple config files can be used with --config/-c option (!909)
- lua: stop trying to tweak lua's GC (!201)
- systemd: add SYSTEMD_INSTANCE env variable to identify different
instances (!906)
Bugfixes
--------
- correctly use EDNS(0) padding in failed answers (!921)
- policy and daf modules: fix postrules and reroute rules (!901)
- renumber module: don't accidentally zero-out request's .state (!901)
Full changelog:
https://gitlab.labs.nic.cz/knot/knot-resolver/raw/v5.0.0/NEWS
Sources:
https://secure.nic.cz/files/knot-resolver/knot-resolver-5.0.0.tar.xz
GPG signature:
https://secure.nic.cz/files/knot-resolver/knot-resolver-5.0.0.tar.xz.asc
Documentation:
https://knot-resolver.readthedocs.io/en/v5.0.0/
--
Tomas Krizek
PGP: 4A8B A48C 2AED 933B D495 C509 A1FB A5F7 EF8C 4869
