- knot-dns-users - lists.nic.cz

Knot Resolver 6.X : split config.yaml in several files ?

by Stéphane Paillet

Hello, I'm not sure I'm posting in the right place. Don't hesitate to tell me if it's not. I began to test the use of Knot Resolver 6.x for a future project (deploying a DNS resolver with blocked domains lists). I would like to know if it's possible to split the config.yaml in several files (the main config in one file, acl and views section in another, data-local section with rpz lists and tags to rely acl lists to blocklists in another), and if the answer is yes, how can I do ? Thank you for your help. Regards, Stephane

1 den, 2 hodiny

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KDIG RFC 4892 Chaos query

by lathama＠gmail.com

I ultimately found that I needed to use a CH in KDIG but wonder how I/We could update the documentation or add an alias for chaos. Working Example: dig +short @<dns server> version.bind chaos txt dig +short @<dns server> version.bind CH txt kdig +short @<dns server> version.bind CH txt Problem Example: kdig +short @<dns server> version.bind chaos txt I had to read source code to find the answer in a speedy timeframe.

1 týden, 3 dny

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Knot DNS 3.4.7 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.7! This is mostly a feature version wit some bugfixes. Note that Ubuntu 20.04 is EOL, and Launchpad no longer builds packages for it. Therefore, we no longer provide updated packages for this version either. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.7 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 týdny, 6 dní

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Signing Benchmark

by Thomas Küchenthal

Hi, for benchmark purpose I need to find out how log it takes to sign zone files in different sizes with different hardware. What is the best way to find out the exact time the signing process takes? Thanks! BR Thomas

1 měsíc, 1 týden

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zone event 're-sign' failed (not enough space provided)

by Thomas Küchenthal

Hi, when signing a zone file I receive this error in the log: "zone event 're-sign' failed (not enough space provided)" Can you tell me what is the limiting factor here? Thanks! BR Thomas

1 měsíc, 1 týden

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Trigger zone transfer from the master that sent NOTIFY

by Alexandr Basov

Hello, Could you please clarify whether Knot can perform a zone transfer not from the first master listed, but from the one that sent the NOTIFY? The masters are configured in the following order: remote: - id: master address: [ "192.168.58.151", "192.168.58.134" ] When a NOTIFY is sent from |192.168.58.134|, the zone transfer is still performed from |192.168.58.151|. Here are the relevant log entries: Apr 25 19:09:25 ubuntu knotd[2065]: info: [chacha.com.] notify, incoming, remote 192.168.58.134@32888 TCP, serial 2006 Apr 25 19:09:25 ubuntu knotd[2065]: info: [chacha.com.] refresh, remote 192.168.58.151@53, remote serial 2006, zone is outdated Apr 25 19:09:25 ubuntu knotd[2065]: info: [chacha.com.] IXFR, incoming, remote 192.168.58.151@53 TCP, receiving AXFR-style IXFR Apr 25 19:09:25 ubuntu knotd[2065]: info: [chacha.com.] AXFR, incoming, remote 192.168.58.151@53 TCP, started Thank you for your product and for your help! *Best regards,* *A.A. Basov*

1 měsíc, 4 týdny

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CDS/CDNSKEY issue

by Michael Grimm

Hi, this happened to me for the second time, that https://dnsviz.net <https://dnsviz.net/> tells me: | enfer-du-nord.net/CDNSKEY: The CDNSKEY RRset must be signed with a key that is represented in both the | current DNSKEY and the current DS RRset. See RFC 7344, Sec. 4.1. | enfer-du-nord.net/CDS: The CDS RRset must be signed with a key that is represented in both the current | DNSKEY and the current DS RRset. See RFC 7344, Sec. 4.1. I do not understand what that means. #) I haven't modified my KSK for some time now #) I did notify my parent zone about a modified list of nameservers (via registrar's web portal) I am not absolutely sure if the latter is the cause for these error messages. I 'fixed' that issue by re-uploading my unmodified KSK DNSKEY (via registrar's web portal). Hmm, how can I fix that issue the right way? Any hints are highly welcome, Michael

2 měsíce

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What is mod-synthrecord used for?

by Michael Grimm

Hi, given the case that a ip6/xy block might be delegated to me by my ISP, I began investigating Knot DNS' functionality with regard to ip6.arpa. Hereby I stumbled over the module synthrecord and do not really understand what it is used for. From https://www.knot-dns.cz/docs/3.4/singlehtml/index.html#synthrecord-automati… "Records are synthesized only if the query can't be satisfied from the zone." Please excuse my ignorance, but why would/should/must one return something else than the following for hosts not in the zone? kbn> host 2001:dead:beef::1 Host 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.e.e.b.d.a.e.d.1.0.0.2.ip6.arpa not found: 3(NXDOMAIN) Any feedback is highly appreciated, thanks. Regards, Michael

2 měsíce, 1 týden

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Seperate config for zones

by Einar Bjarni Halldórsson

Hi, This is just a possible feature request. We’re planning on using Knot for user hosted domains. To do that we’ll have to add and remove zones dynamically, so we’ve enabled the config db. What surprised us is that this means that the config file isn’t used at all anymore (except you can use it to prime the config db). As it is, we’ll have to embrace the config db, which makes our ansible playbook more complicated. It’s easy to add a config file template in ansible, it’s more complicated to issue `knotc conf-begin; knotc conf-set; knotc conf-commit` logic. I wish knot was more like nsd, where you have the config file nsd.conf, but if you add zones with `nsd-control addzone ….` it gets added to a seperate zonelist file, which nsd reads on startup. It means we can have a static config file, but still be able to add and delete zones dynamically. nsd doesn’t have automatic DNSSEC key management and catalog zones in knot are really easy to use, which is why we’re going with knot for this project. I just wanted to lay it out there as an idea for the future :) .einar

2 měsíce, 1 týden

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Knot DNS 3.4.6 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.6! This is a bugfix version. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.6 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

2 měsíce, 2 týdny

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Re: Configuration database vs file questions

by Daniel Salzman

Hi Bill, You can't mix a configuration database and a configuration file. You can initialize a database with `knotc conf-init` or `knotc conf-import`. Then if you start knotd, the database will be used for reading and persistent writing. The configuration database format is a custom format using LMDB. It's not intended to be accessed externally! Daniel On 3/29/25 19:56, Billiam Crashkopf wrote: > Hi all, > > I'm running Knot 3.4.4 on FreeBSD 14.2, installed from the distribution package repository. > > I'm trying to understand, is there a way to configure knotd using both the configuration file and the database? For example, can I use the configuration file for directives like listen and template, then use the configuration database for storing individual zone settings? So far, it appears that knotd only uses one or the other. Furthermore, there doesn't seem to be any command to explicitly load or flush configuration from the database. If I start with the config file, I can initialize the database, but upon stopping knotd nothing seems to be saved to the database. I also don't see any documentation on tooling to inspect the database on disk. What is the file format of the database? > > If anybody can help me to know more about how it works I would be most appreciative. > > Thanks, > > Bill >

2 měsíce, 3 týdny

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HSM keystore-bench

by Jan-Piet Mens

Hello! In July 2024, in the Knot-DNS 3.3.8 release message, Daniel writes: >I would like to ask users with hardware HSMs to send us the output of `keymgr <hsm_keystore_id> keystore-test` >This will allow us to update https://www.knot-dns.cz/docs/latest/html/appendices.html#compatible-pkcs-11… We're now running Knot 3.4.4 against a Thales HSM (I have no details of the actual device/model in use at this time) and I see the following data: $ keymgr -c etc/knot.conf thales keystore-bench Keystore id 'thales', type PKCS #11, threads 1 Algorithm Sigs/sec RSASHA256 33 ECDSAP256SHA256 27 ED25519 n/a ED448 n/a My first reaction was "hmm, that's slow". Is there a list (above URL isn't it) of comparable results which I could show the HSM operators and/or is anybody willing to share their data? Thanks & regards, -JP

3 měsíce, 1 týden

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Knot DNS 3.4.5 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.5! This is mostly a feature release. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.5 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

3 měsíce, 1 týden

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Re: Knot compliance with

by Henry Birge-Lee

Hi Vladimir, I appreciate your response and it's great to know you validate by default. I apologize for posting to the wrong list. Best, Henry On Wed, Mar 12, 2025 at 9:14 AM Vladimír Čunát <vladimir.cunat(a)nic.cz> wrote: > Hello. > On 10/03/2025 17.01, birgelee--- via knot-dns-users wrote: > > This ballot requires compliance with RFCs 4035 (specifically an implementation of a "security-aware" resolver as defined in Section 4) and 6840. To the best of my knowledge Knot would be a viable choice for conforming to this ballot particularly since there is a reference to RFCs 4035 in the config documentation and 6840 implements several key features of modern DNSSEC. Given the need for documentable compliance by CAs, a statement of intended support from the Knot team would be extremely helpful. > > This is about resolvers apparently, so we're slightly off-topic here, as > we have a split knot-resolver-users(a)lists.nic.cz - but I expect this > thread to be very short. > > Knot Resolver *does support* modern DNSSEC validation, as described in RFC > 4035, 6840, and some others. And we validate by default, etc. > > --Vladimir >

3 měsíce, 1 týden

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Knot compliance with

by birgelee＠princeton.edu

Hi all, I know this topic has been dead for a bit, but I did want to specifically find out if Knot is intended to be compliant with DNSSEC RFCs 4035 and 6840. I ask because I am computer security researcher and I do a lot of work with the CA/Browser Froum. I recently proposed a draft ballot that would mandate all publicly-trusted web CAs validate DNSSEC: https://github.com/cabforum/servercert/pull/571 This ballot requires compliance with RFCs 4035 (specifically an implementation of a "security-aware" resolver as defined in Section 4) and 6840. To the best of my knowledge Knot would be a viable choice for conforming to this ballot particularly since there is a reference to RFCs 4035 in the config documentation and 6840 implements several key features of modern DNSSEC. Given the need for documentable compliance by CAs, a statement of intended support from the Knot team would be extremely helpful. Best, Henry https://henrybirgelee.com/

3 měsíce, 1 týden

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mod-rrl

by Randy Bush

is there any guidance on using mod-rrl on a public server with a moderate load, say 6kqps? we have rtfm, and remain unsure of what we are doing. we want cookies, and therefore need to turn rrl on. but with it turned on, we seem to drop a *lot* of replies, a lot. mod-rrl: - id: default rate-limit: 200 slip: 2 randy

3 měsíce, 2 týdny

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IXFR versions journaling without using file

by Jeremy C. Reed

I have static zones that are regenerated continually (every few seconds) with a knotc zone-reload _zonename_ after. Doing dig queries using ixfr= always used AXFR until I enabled per-zone zonefile-load: difference We saw logs periodically like: warning: [foo.bar.example.com.] failed to update zone file (operation not permitted) This is because the files created are a different user than the knotd. We are not doing automated signing nor dynamic updates. This is with Knot 3.2.6. 1) Why would it try writing to the source zone file? Anyways, we got rid of that warning with zonefile-sync: -1 And the time to between the zone-reload and serving the new zone data improved too. I noticed with experimenting with journal-db-max-size and journal-max-size the data.mdb was around 80% larger than the defined size. As I removed and added records, the number of differences reduced and I couldn't do IXFRs for many versions behind which I assume is default journal-max-depth: 20. I believe this means the journaling was dropping versions and does not require keeping at least 20 versions (not a "minimum". I am fine with that. I was able to trigger error like error: [foo.bar.example.com.] zone event 'load' failed (not enough space provided) which I assume was due to journaling even when dropping old versions still doesn't have enough space for most recent changes. We are experimenting with increasing journal-max-size to work around this. It appears that the differences are fully handled in memory first before updating to the journal file. I also see the journal file have large jump in file size and never small increments. 2) Since I have no purpose to reuse a journal file for system restart or recovery -- since I am building new zone files frequently, is there any way to not use a journal file and just have knotd do this all in memory? That way it is never writing to the journal every few seconds while I continue to offer IXFR out support? If not, maybe I will use memory file system for the journal files. By the way, this is for around ten zones varying from around 1000 records to over 8 million records for the larger zones, They are changing from a few records every few seconds to maybe a thousand records every 30 seconds. Thanks

3 měsíce, 2 týdny

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IXFR response has interspersed IXFR and OPT records and more

by Jeremy C. Reed

I am testing IXFR for servers I did not install nor have easy access to. version.server. says it is 3.2.6. I know there are IXFR changes since then per the NEWS file and from git log. I don't see same behavior on my different version different systems but they are also configured differently. The knot.conf zones are not configured with "zonefile-load: difference" and the response effectively has the entire zone as if was AXFR and not the changes. If I pass the IXFR SOA SERIAL to latest it has no changes (answer has has the SOA only with same serial). I used dnspython to output the response from doing IXFR queries (IXFR question with SOA authoritative set with the serial in the query). I noticed the output abruptly stops when "dig" doesn't stop. So I used tcpdump many times to compare knot, named, and my other knot. I found an odd behavior in this knot 3.2.6 response which dig ignores and my dnspython fails. After the expect record it has 1) OPT record with the requestors pay load size (class 1232) and edns rcode and flags (all zeros ttl), then 00 rdlength and 00 rdata field. 2) then 28 bytes I don't understand such as: 40 11be dc80 0000 0101 fa00 0000 01 or 40 20be dc80 0000 0102 0300 0000 01 or 40 0fe1 6a81 0000 0102 0500 0000 00 or 12 8de1 6a81 0000 0100 9200 0000 00 3) then an IXFR record following other labels ... 0363 6f6d 00 three characters "com" and end of domain 00 fb IXFR record type 00 01 INternet class and then ends there, with NO ttl, rdlength, nor rdata. 4) followed by next label length, label ... etc with rrtype, class, ttl, rdlength, rdata and so on. This odd OPT, bytes I don't know, partial/broken IXFR record, may be repeated a few times. I assume these were interspersed where IXFR's SOA records should be. I couldn't find an RFC that suggested using interspersed OPT nor IXFR records. I find it odd that OPT record is in my ANSWER section. I find it odd that the IXFR record is incomplete. And I don't know what the other bytes are in-between. This recognizable to anyone? The IXFR works fine as seen with dig or when I use named as my secondary but I assume the named is ignoring the junk parts too.

3 měsíce, 3 týdny

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mod-onlinesign: extra DNSKEY causes double signatures

by Peter Thomassen

Hi, Consider a zonefile with @ DNSKEY 257 3 13 ZAtZvaK2/uVw+LG2AA12Dt/ZZ+YN0IF3pFwjfBp8Jd2DXjVU0cdxfpkY StUdbFu24Js6T5uROHo8lSG9rhgduw== and configuration zone: - domain: example.com storage: /config/ file: example.com.zone module: mod-onlinesign -- Like our community service? 💛 Please consider donating at https://desec.io/ deSEC e.V. Möckernstraße 74 10965 Berlin Germany Vorstandsvorsitz: Nils Wisiol Registergericht: AG Berlin (Charlottenburg) VR 37525

4 měsíce, 1 týden

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Dynamic update fails after zone creation via catalog

by Daniel Gröber

Hi Knots, I use catalog zones to sync the set of zones my (hidden)master and slaves handle. I'm trying to stop messing with zone files on my master, instead switching exclusively to nsupdate (along with Tony Finch's nsdiff). In my testing it seems updating the zone after adding it via a catalog is not possible: $ knotc zone-status dxld.at [dxld.at.] role: master | serial: - | catalog: dxld.catalog. | re-sign: +9D15h6m14s Yet the update fails: $ knsupdate -y $SECRET <<EOF > server ns0.dxld.at. > zone dxld.at. > add dxld.at. 3600 IN SOA ns0.dxld.at. hostmaster.dxld.at. 1 2m 5m 1w 5m > send update failed: SERVFAIL Nothing is logged with `logging: any: debug` except a "ACL, allowed, action update". As soon as I create the zone on the server with zone{-begin,-set,-commit} it starts working ofc. I guess this is just not supported, but is there a good reason? I would find it quite convenient to do all my DNS ops over port 53 without touching ssh ;-) Thanks, --Daniel

4 měsíce, 3 týdny

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Issue - trailing data

by Артём Палецкий

Hello! I have an issue. Knot is configured as a secondary server, and when receiving a zone, a "trailing data" error occurs, preventing the zone from being loaded from the primary server. ``` Jan 30 11:03:40 hostname knotd[5407]: info: [domain.com.] refresh, remote 50788646-db98-4caa-b26e-95b30a470796, address 1.2.3.4@53, failed (trailing data) ``` The same warning appears when using the `kdig` utility: ```bash kdig @1.2.3.4 domain.com AXFR > /tmp/domain.com ;; WARNING: malformed reply packet (trailing data) ;; WARNING: malformed reply packet (trailing data) ``` The issue occurs specifically with large zones. If the zone requires 2 messages to be received (e.g., `Received 32720 B (2 messages, 442 records)`), one warning appears. If it requires 3 messages (e.g., `Received 49083 B (3 messages, 878 records)`), two warnings appear. However, if I place this zone (`/tmp/domain.com`) into `/var/lib/knot` and then execute: ```bash knotc reload knotc zone-refresh domain.com ``` Knot successfully loads the zone. Unfortunately, due to confidentiality, I cannot share the contents of the zone. Additionally, I do not have precise information about the software installed on the primary server. However, if BIND is used as the secondary server, there are no issues. A regular `dig` command also does not return any errors. Is there any way to make Knot ignore the "trailing data" error and successfully load the zone? Thank you for your help!

4 měsíce, 3 týdny

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Knot DNS 3.4.4 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.4! This is a bugfix version with some improvements. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.4 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

5 měsíců

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knotc issue since 3.4.1

by Jean-Daniel Dupas

Hello, I have an issue with a behaviour change in knot 3.4.1. Before 3.4.1, trying to send a conf-abort command using knotc to knot when there was no pending transaction properly returned an error, but since 3.4.1, instead of receiving an error, the connection hangs, and failed after a timeout. Some digging shows that this is due to a change in commit 69328dd7799253978605f7dac29175945971e63f Instead of returning and error as it should, ctl_process skip the command processing when it does not expect a conf-abort command. Is this a bug, or is this behaviour intended ? Just to give you some context about my use case, I wrote a daemon that is using libknot to sync the dns configuration, and as knot does not supports multiple transaction, it has to make sure there is no dangling transaction before trying to apply changes (in case the daemon did crash while applying a previous change). Until 3.4.1, it did that by simply sending a conf-abort before starting the new transaction. Thanks

5 měsíců, 2 týdny

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HSM support

by Thomas Kuechenthal

Hi Guys, a happy new year to all of you! Due to policy reasons we need to make knot use a HSM in the future. Is anybody successfully using some cloud based HSM services like Google Cloud HSM for DNSSEC signing? Any information is helpful, thanks! BR Thomas

5 měsíců, 2 týdny

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Knot DNS 3.3.10 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.10! This version backports some fixes and improvements from 3.4. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.10 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

6 měsíců, 2 týdny

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Change of default nsec3-salt-length

by Erwan David

Hello, My knot 3.4.3 gives me following notice : notice: config, policy 'rail_policy' depends on default nsec3-salt-length=8, since version 3.5 the default becomes 0 In order to avoid problems when .5 will arrive, I see 2 possibilities: * add an explicit nsec3-salt-length=8 to my policy * add an explicit nsec3-salt-length=0 to my policy and resign the zone. From https://www.ietf.org/archive/id/draft-ietf-dnsop-nsec3-guidance-10.html#nam… I understand that 0 should be the new configuration, but what are the risks (considering eg. DNS caches) if I change the policy of the zone? I only have small zones, with very few dynamic changes, which I can delay for the time of the TTL if needed. -- Erwan David

6 měsíců, 2 týdny

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Knot DNS 3.4.3 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.3! This is a bugfix version with some improvements. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.3 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

6 měsíců, 2 týdny

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Starting and stopping knotd

by Erik P. Ostlyngen

Hi, I'm running an instance of knotd for testing. It is installed with the official ubuntu debian package from kont-dns.cz. When I start the knot service, using systemctl, it takes a very long time to start up (sometimes 30 min). This seems to be related to the systemd unit which is set to type 'notify', and the fact that knot after starting up wants to re-sign all the zones which needs that before notifying. If I change the type to 'simple' or 'forked' (together with the knotd -d option), the start command returns more immediately. My test system has about 800 zonefiles in it. A large number of them want to be re-signed after each startup. My question is, what is the recommended way to start, stop and restart the server? Also, after starting I cannot find the /run/knot/knot.sock file, which is needed when stopping the service with 'knotc stop'. Knot version: 3.4.1-cznic.1~focal (debian package from knot-dns.cz) OS: Linux 5.4.0/Ubuntu 20.04 Focal amd64. Kind regards, Erik Østlyngen Norid

7 měsíců, 2 týdny

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EPEL Packages

by Günther J. Niederwimmer

Hello Daniel, Are the EPEL packages no longer available (?), I'm stuck at 3.3.9. There have been no updates since then. Or can you download the .rpm from somewhere else now? -- mit freundlichen Grüßen / best regards Günther J. Niederwimmer

7 měsíců, 3 týdny

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Knot DNS 3.4.2 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.2! This is a bugfix version with a few improvements. Upgrade from 3.4.0 and 3.4.1 is recommended. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.2 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

7 měsíců, 3 týdny

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Knot DNS 3.4.1 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.1! This is a bugfix version with some new features. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.4.1 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

8 měsíců, 1 týden

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Knot DNS 3.4.0 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.4.0! This version brings DNS/XFR over TLS, DDNS over QUIC and TLS, continuous DNSSEC zone validation, XDP improvements, enhanced RRL, partially asynchronous processing of control commands, and more. See the changelog. Today, Knot DNS 3.2 reached its end-of-life! Changelog: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.4.0/NEWS Migration: https://www.knot-dns.cz/docs/latest/html/migration.html#upgrade-3-3-x-to-3-… Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

9 měsíců, 1 týden

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Deny dynamic updates for certain owners/names

by Conrad Hoffmann

Hi all, we are using dynamic updates for solving ACME challenges. My goal is to restrict the key used for this as much as possible. However, I find it a bit difficult to do so while keeping the required flexibility. Maybe someone has some good recommendations for this? The key is already restricted to TXT records, so that's good. In a nutshell, I'd like to allow only "_acme-challenge.example.com" and "_acme-challenge.*.example.com". However, the latter cannot be expressed in the current config format. I would be fine allowing "*.example.com", if I could just deny a select few names (SPF, DKIM). But AFAICT, the "deny" option only works on action, key, and address, now owner matching. Is there any other way to achieve something like this? Thanks a lot, Conrad

9 měsíců, 3 týdny

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Knot DNS 3.3.9 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.9! This is a bugfix version with a few improvements. Since version 3.3.4, there has been a bug in 'keymgr pregenerate', where future timestamps of existing keys are cleared and new overlapping keys are generated instead. An upgrade is recommended if you use this function or offline KSK. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.9 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

10 měsíců

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$TTL default setting ignored for resource records without explicit TTL set

by Michael Grimm

Hi, I do have the following example zone files definitions: $ORIGIN example.tld. $INCLUDE ___TTL_SOA___ and so on My ___TTL_SOA___ looks as follows: $TTL 30m ; default expiration time of all resource records without their own TTL value ; @ IN SOA ns1.example.tld. hostmaster.example.tld. ( 2024042100 ; serial (increase after each change) 4h ; refresh (recommended >= 4h) 1h ; retry (recommended >= 1h) 14d ; expire (recommended between 7d and 14d) 600 ; negative caching (former minimum, recommended between 5m and 1d) ) Note: All of my subsequent $INCLUDDE files do *not* have TTL values set explicitly! But: I do end up in a mix of TTL values of 1800 and 3600 for my resource records. You can check that using my domain in my email address. I found the following thread about this issue at https://gitlab.nic.cz/knot/knot-dns/-/issues/751 and https://datatracker.ietf.org/doc/html/rfc2308#section-4 cited therein: "All resource records appearing after the directive, and which do not explicitly include a TTL value, have their TTL set to the TTL given in the $TTL directive." In my understanding Knot's behaviour has been set to follow this standard track. Thus, I do expect that all of my resource records should have a TTL set to my $TTL directive of 1800 seconds. I might have well overlooked something, though. Any feedback is highly appreciated, Michael

11 měsíců

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Knot DNS 3.3.8 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.8! This version fixes a few bugs and brings some features. I would like to ask users with hardware HSMs to send us the output of `keymgr <hsm_keystore_id> keystore-test` along with a description of the HSM. This will allow us to update https://www.knot-dns.cz/docs/latest/html/appendices.html#compatible-pkcs-11… Thank you! Note that it's no longer possible to build packages for CentOS 7 using Copr! Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.8 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

11 měsíců

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address lists

by Randy Bush

as yaml seems to vary widely, i worry that i may have over-induced knot yaml re address lists, see https://www.knot-dns.cz/docs/3.3/singlehtml/index.html#description remote: - id: foo address: 1.2.3.4 address: 2.3.4.5 address: 3.4.5.6 address: 6.7.8.9 is said to be the same as remote: - id: bar address: [1.2.3.4, 2.3.4.5, 3.4.5.6, 6.7.8.9] but is it also the same as remote: - id: feen address: [1.2.3.4, 2.3.4.5] address: [3.4.5.6, 6.7.8.9] feen does not result in a `knotc conf-check` syntax error, so i hope it is indeed equivalent. randy

11 měsíců, 1 týden

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kasp database: how to find orphaned keys?

by Michael Grimm

Hi, is there a functionality that identifies orphaned key in the kasp database and optionally deletes those? I had had a couple of orphaned pem files. I managed to identify and remove those with the help of 'keymgr' and Unix little helpers, though. Thus I am asking just out of curiosity, because I might have missed such a functionality. Thanks and regards, Michael

11 měsíců, 2 týdny

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idn in axfr

by Randy Bush

knot fails to keep this zone updated. so i tested by hand ``` rip.psg.com:/home/randy# dig f.e.e.b.d.a.e.d.1.3.0.0.8.9.8.0.2.0.a.2.ip6.arpa @94.142.241.91 axfr ; <<>> DiG 9.18.24-1-Debian <<>> f.e.e.b.d.a.e.d.1.3.0.0.8.9.8.0.2.0.a.2.ip6.arpa @94.142.241.91 axfr ;; global options: +cmd ;; Warning: cannot represent 'xn--center-dla.test.globnix.net.' in the current localedig: Cannot represent 'xn--ls8h.test.globnix.net.' in the current locale nor ascii (string contains a disallowed character), use +noidnout or a different locale ``` `+noidnout` does fix it, but i am not sure i can get knot's axfr to do that the owner of the primary says Okay, this is the zone with a whole bunch of records designed to stress-test DNS implementations with things which are technically allowed in DNS at the protocol level but which apps might not handle well. Zonefile top comment: ; This is the /80 reverse DNS used for test entries which should never be ; assigned to hosts. This is </48-prefix>:DEAD:BEEF::/80 Those particular records were added on 2013-04-05 per `git blame`: 233c7992 (Phil Pennock 2013-04-05 00:08:22 +0000 64) 0.6 PTR mid\194\183dle.test.globnix.net. 233c7992 (Phil Pennock 2013-04-05 00:08:22 +0000 65) 1.6 PTR xn--center-dla.test.globnix.net. 233c7992 (Phil Pennock 2013-04-05 00:08:22 +0000 66) 2.6 PTR \240\159\146\169.test.globnix.net. 233c7992 (Phil Pennock 2013-04-05 00:08:22 +0000 67) 3.6 PTR xn--ls8h.test.globnix.net. so, `noidnout` is not in knot doc html file. clue bat, please. randy

11 měsíců, 3 týdny

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Knot DNS 3.3.7 and 3.2.13 releases

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.7 This version primarily fixes an old bug in the journal where some SOA serial values are incorrectly evaluated, which can corrupt the journal. Upgrade is recommended. Version 3.2.13 backports this and some older bug fixes. Changelogs: https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.3.7/NEWS https://gitlab.labs.nic.cz/knot/knot-dns/raw/v3.2.13/NEWS Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

12 měsíců

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question about unixtime

by Randy Bush

i have had a fun day chasing diags of the form ``` 2024-06-22T18:32:57.305472+00:00 ns knotd[24354]: info: [foo.com.] control, received command 'zone-reload' 2024-06-22T18:32:57.307532+00:00 ns knotd[24354]: info: [foo.com.] zone file parsed, serial 1719081134 2024-06-22T18:32:57.307669+00:00 ns knotd[24354]: warning: [foo.com.] zone file changed with decreased SOA serial 2024-06-22T18:32:57.307828+00:00 ns knotd[24354]: error: [foo.com.] zone event 'load' failed (value is out of range) ``` i have the following hypothesis: - `serial-policy: unixtime` is configured in `/etc/knot/knot.conf`. - emacs dns-mode sets the SOA serial to the current unixtime when one saves the zone file - a few seconds later, i do `knotc zone sign` and `knotc zone-reload` - knot then says "you have manually specified a new serial, but it is less than the current unixtime; i.e. you are trying to go backward. bad geek!" - i.e. knot did not like me mucking with the SOA serial in the zone file when `serial-policy: unixtime` was configured. i tested this hypothesis by putting the serial from the server's current SOA in the zone file and doing sign & reload. it succeeded, and the new zone in all servers is the unixtime of the signing, not of the zone file. my current conclusion is: do not have both emacs dns-mode with `serial-policy: unixtime`; use only one or t'other. especially if doing RFC 1982 serial stepping, remember to first turn off `serial-policy: unixtime` and `knotc reload`. does this make sense? randy

12 měsíců

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tcp ddos

by Randy Bush

so, school is out and the children are on the loose 2024-06-10T21:27:24.199750+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 2620:171:c2::49@33322 2024-06-10T21:27:24.200561+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 167.99.160.10@14871 2024-06-10T21:27:24.200642+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 34.223.46.240@53392 2024-06-10T21:27:24.201218+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 167.99.160.10@2011 2024-06-10T21:27:24.201422+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 81.106.125.151@54192 2024-06-10T21:27:24.203263+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 34.223.46.240@53398 2024-06-10T21:27:24.203643+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 139.99.166.37@42942 2024-06-10T21:27:25.199585+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 3.228.173.229@34084 2024-06-10T21:27:25.199678+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 76.93.200.106@10371 2024-06-10T21:27:25.200951+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 2a02:6b8:c04:262:0:433f:1:3@33586 2024-06-10T21:27:25.201029+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 2600:3c09::f03c:93ff:fea9:4de0@54166 2024-06-10T21:27:25.201207+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 118.99.2.29@33170 2024-06-10T21:27:25.201385+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 213.187.92.252@40559 2024-06-10T21:27:26.200340+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 2a02:6b8:c04:262:0:433f:1:3@33594 2024-06-10T21:27:26.200529+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 40.79.144.82@59683 2024-06-10T21:27:26.203837+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 103.85.93.93@60578 2024-06-10T21:27:26.205102+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 13.244.33.51@33812 2024-06-10T21:27:27.208589+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 18.139.204.179@46824 2024-06-10T21:27:27.210062+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 20.125.201.35@63627 2024-06-10T21:27:27.331742+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 172.217.37.144@64719 2024-06-10T21:27:27.332050+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 191.233.201.73@61718 2024-06-10T21:27:27.391797+00:00 rip knotd[1389]: notice: TCP, terminated inactive client, address 81.106.125.151@50624 like tens of thousands. some children are like that. so, we take this as an opportunity to learn a bit more about knot tuning we shortened `tcp-idle-timeout: 2` we set `tcp-max-clients: 20` rate limiting seems unlikely to improve things as it is many sources, a DDos what else are we missing? btw, it also whacked knot enough that it failed a resign cycle and we had to add `unsafe-operation: no-check-keyset` to get back to signing. clues appreciated. this can't be the only neighborhood with children. randy

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DNSSEC debugging help wanted

by Korry Luke

Hi folks, Forwarding on behalf of Randy Bush since his mail server/DNS are being DDoSed right now. Trying to troubleshoot, but any knot DNS expertise would be greatly appreciated. Regards > debian 12 > knotc (Knot DNS), version 3.2.6 > (aside: the server is under serious TCP and UDP DDoS) > > all looks reasonable > > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] control, received command 'zone-sign' > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, dropping previous signatures, re-signing zone > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 53567, algorithm RSASHA256, KSK, public, active > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 25843, algorithm RSASHA256 > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 59161, algorithm RSASHA256 > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 5489, algorithm RSASHA256, KSK, public, active+ > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, key, tag 22090, algorithm RSASHA256, public > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, signing started > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, successfully signed > Jun 12 03:36:17 rip.psg.com knotd[22495]: info: [psg.com.] DNSSEC, next signing at 2024-06-25T02:36:17+0000 > > # keymgr psg.com list > 649b0d43d1493dd4ad30f8043ca4561c33c38b5a 53567 KSK RSASHA256/2048 publish=1078099200 active=1078099200 > 173597db4b4f2f072b568cb637710e891ac52246 25843 ZSK RSASHA256/2048 publish=1709251200 active=1709251200 retire=1717977600 remove=1717977600 > 3194d896f2a64f10b103991e5018b72cd3f1cd28 59161 ZSK RSASHA256/2048 publish=1709251200 active=1709251200 retire=1717977600 remove=1717977600 > 7b1bf414b34f605c68f9ddb7b52c32c6b53da8d3 5489 KSK RSASHA256/2048 publish=1718161132 > 902b8e02a5e75754bd69791735e76cb11c3e37af 22090 ZSK RSASHA256/2048 publish=1718161132 > > > but no rrsig > > # dig @localhost +vc +dnssec +norec -t dnskey psg.com > > ; <<>> DiG 9.18.24-1-Debian <<>> @localhost +vc +dnssec +norec -t dnskey psg.com > ; (2 servers found) > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42269 > ;; flags: qr aa; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1 > > ;; OPT PSEUDOSECTION: > ; EDNS: version: 0, flags: do; udp: 1232 > ; COOKIE: 7f45da4f7305fdd5010000006669234c9ce14bdf78917f58 (good) > ;; QUESTION SECTION: > ;psg.com. IN DNSKEY > > ;; ANSWER SECTION: > psg.com. 86400 IN DNSKEY 256 3 8 AwEAAZfG8Y++ZmGXwa1sgmHpruUSPljDwMR2pY5bUjjOaJNyUBeLlEAP Fyya3MNAKryW26yTxFmwYmyt0UtXyc4L7Ib5/J/Ew+putYpjRfslwPlS 5TWblvnbiqGcY/ZMuGrtLeZkvK/o39vXM+Hy5y3xbG4Qu4ySiuW03xMM pN50cr8+VcM2RDQn6/W6kESdiY8WaXyD1DT9eIgIyi5zTaOfhSB7u/g7 H+7LltCAiCZIcIF08CGbS1VEh0YUyw3Th1I6jiQmYeGG6OSGaci5SkjV fGTDpHrJOjFlCnUVfg+cYc1YPEojbmo90qO/nG+VB5I+qDYtkU1IR8EB +qXNi7ZbBt8= > psg.com. 86400 IN DNSKEY 257 3 8 AwEAAaCgMhvfatdo1jeqr0AsHJY+QB/QVv2O+9W62Sfj+xKCbV5nGgvu XqPq2A8tXKT1lG1YF0pe3/ABH2iYNZs7v/a6QAb1wEAYasNz6ZlvRca2 bDs6KXz/n2B/Oeb2JoWBJ6OqdNtzkDl6CYEOkQoDWRnbR9jlyINOQ0mN xfTu2wbXMngSIz78yTadpieyuG/B/TsLQ1SlTUSf436G5NMdxzQ8r7j4 5nW7mEORzvvk5Z1mGtfX8v8taw4qFfoIlaf226N06lZ90jpnEHTOGSTA T/ii5WVqjBZGFWFYWrNcHR51zHm4QAGKlZ5hzr6lrGZaXqgY7jE3GaOc 86mZhSlyYIs= > psg.com. 86400 IN DNSKEY 257 3 8 AwEAAcXR1VhQRarToAaewor9xoQhrXbmUd9Ob0ruqOpDs5TO/jZLTOFE W/g4V1yllr9t7tyLVJWA5jdZyJZO3otyu6S+OKvSLD8er3alStkgqI2Q bLF3gUjtGxmcd/yIci4srWj401tv/6uWigN50+9Df0ClgUpmdjQ/ePq8 51DKtK51qGgc4vHwSYoWKQaGTofELiMDDXpzZSkQqAUveZYRzVTScUCQ woVjQANSmio/u6JZtkwRnnUF9bChN51ydUY+uVH9NuoY6jEKJ27ZlIAP 4UgQ0h9epWy5JYV9bNQlhV+qpW1G3Zg/l58Yz5mWwh107HQIUefCgVP+ TTIusTwWH0E= > > ;; Query time: 0 msec > ;; SERVER: ::1#53(localhost) (TCP) > ;; WHEN: Wed Jun 12 04:25:48 UTC 2024 > ;; MSG SIZE rcvd: 892 > > maybe 35 zones with same policy and tenplate. one has RRSIGs no others > do. > > mod-rrl: > - id: default > rate-limit: 12 # Allow 200 resp/s for each flow > slip: 2 # Approximately every other response slips > table-size: 900241 > > mod-cookies: > - id: default > secret-lifetime: 30h > badcookie-slip: 6 > Wrong Cookie > > Policy: > - Id: Pol-256-256 > Algorithm: Rsasha256 # Was Ecdsap256sha256 Sra Uses Ecdsap384sha384 > Manual: On > Delete-Delay: 30d > Unsafe-Operation: No-Check-Keyset > ... > template: > - id: default > storage: /var/lib/knot/primary > semantic-checks: on > file: %s > global-module: mod-rrl/default > global-module: mod-cookies/default > - id: signed > storage: /var/lib/knot/signed > dnssec-signing: on > dnssec-policy: pol-256-256 > semantic-checks: on > zonefile-sync: -1 > zonefile-load: difference > journal-content: all > serial-policy: unixtime > > sra and i have been beating our heads on this for two days. and there > are significant zones breaking > > randy -- Korry Luke ルーク,　コリー koluke(a)wide.ad.jp Graduate School of Media and Governance Keio University Shonan Fujisawa Campus 慶應義塾大学湘南藤沢キャンパス政策・メディア研究科

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Knot DNS 3.3.6 release

by Daniel Salzman

Hello Knot DNS users, CZ.NIC has released Knot DNS 3.3.6! This is mostly a maintenance version with some improvements. Please note that Knot DNS 3.3 is the last major version officially supported on CentOS 7 (and similar), Debian 10, and Ubuntu 18.04. Version 3.4.0, which will be released in August, will not support them. Changelog: https://gitlab.nic.cz/knot/knot-dns/-/releases/v3.3.6 Download: https://www.knot-dns.cz/download/ Documentation: https://www.knot-dns.cz/documentation/ Support: https://www.knot-dns.cz/support/ Regards, Daniel

1 rok

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Knot DNS serverupgrade tool (2.2.x->3.3.x)

by Josef Karliak

Good morning, is there some tool to migrate configuration from Knot 2.2 to actual 3.3.x ? There are some configuration changes, they're so far so good, but I'm stuck on migrating DNSSEC keys now. Thanks and best regards. J.Karliak

1 rok

2
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install package to freebsd

by André Cruz

Hi, When i try to install knot via ports as your documentation sayshttps://www.knot-dns.cz/docs/2.4/html/installation.html [cid:f31a0a83-7640-46e7-8586-d353f8c3d8f0] it points me to a verison of 2015 https://www.freshports.org/dns/knot Can you guys change the line to # cd /usr/ports/dns/knot3 just to be more clear for a new user of freebsd https://www.freshports.org/dns/knot3 Com os meus melhores cumprimentos, André Cruz

1 rok

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module 'mod-onlinesign/authsignal', incompatible with automatic signing

by Erwin Lansing

Howdy, I’m trying to get Knot 3.3.5 to use authenticated DNSSEC bootstrapping following the blog article and docs. However, I’m getting an error for the signalling zones, but I fail to figure out what I may have overlooked. error: [_signal.ns2.droso.dk <http://signal.ns2.droso.dk/>.] module 'mod-onlinesign/authsignal', incompatible with automatic signing Relevant knot.conf snippets (in order): policy: - id: ecc algorithm: ecdsap256sha256 nsec3: on rrsig-refresh: 7d mod-onlinesign: - id: authsignal nsec-bitmap: [CDS, CDNSKEY] policy: ecc template: - id: default … dnssec-signing: on dnssec-policy: ecc … zone: - domain: _signal.ns2.droso.dk <http://signal.ns2.droso.dk/> module: [mod-authsignal, mod-onlinesign/authsignal] Any hint appreciated Best Erwin

1 rok

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KNOT resolver and NS serverers with CNAME

by Josef Karliak

Good morning, ISC bind is strict about CNAME of NS server: skipping nameserver 'aa.bb.cz' because it is a CNAME, while resolving '9.4/4.3.2.1.in-addr.arpa/PTR'. How about Knot resolver ? Thanks and best regards J.Karliak

1 rok, 1 měsíc

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Remotely adding zones

by Einar Bjarni Halldórsson

Hi, I have a use case, where today we’re running BIND and a daemon uses rndc to create/remove/update zones on secondary servers. According to `man knotc` knotc only supports UNIX sockets (old ubuntu man page showed ‘-p’ parameter to specify port). I know I could use a catalog zone, but that would be a bigger change than I prefer right now. The primary server is running BIND+DLZ with a PostgreSQL backend. Replacing the primary is on the roadmap, but for now, I just want to replace the secondaries. Is there a good way to remotely add zones to a knot secondary? .einar

1 rok, 2 měsíce

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knotc reload after updates to knot.conf

by Angus Clarke

Hello, When doing something quite dramatic in knot.conf like adding and/or removing a zone, is "knotc reload" a suitable approach to honour those changes or would you recommend restarting the whole process? "knotc reload" seems to work just fine in test, I'm just looking for some further confidence I suppose. Thanks Angus

1 rok, 2 měsíce

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