Update on stats 2020-11
Viktor Dukhovni
ietf-dane at dukhovni.org
Tue Dec 1 03:24:32 CET 2020
Summary: The DANE domain count is now 2,351,764 (up from 2,312,209 last
month).
The number of domains that return DNSSEC-validated replies in
response to MX queries is 13,221,772 (up from 12,951,015 last
month). Thus DANE TLSA is deployed on ~17.78% of domains with
DNSSEC.
Please be mindful of the upcoming Let's Encrypt Issuer
CA switch from X3/X4 to R3/R4 and E1/E2. See:
http://dnssec-stats.ant.isi.edu/~viktor/x3hosts.html
Credits: The coverage of DNSSEC domains continues to improve with
ongoing data support from Paul Vixie of Farsight Security.
Credits also due to ICANN for gTLD data via CZDS, and to
the TLD registries for .CH, .COM, .DK, .FR, .INFO, .IS, .LI,
.NL, .NU, .ORG and .SE. More data sources of ccTLD
signed delegations welcome.
As of today I count 2,351,764 domains with correct SMTP DANE TLSA
records at every primary MX host that accepts connections[1]. As
expected, the bulk of the DANE domains are hosted by the DNS/email
hosting providers who've enabled DANE support for the customer domains
they host. The top 20 MX host providers by domain count are below.
This month Last Month
---------- ----------
1,131,984 one.com 1,135,322 one.com
145,526 transip.nl 147,497 argewebhosting.nl
145,371 argewebhosting.nl 144,505 transip.nl
103,043 domeneshop.no 102,517 domeneshop.no
93,223 infomaniak.ch 91,246 loopia.se
91,856 loopia.se 90,381 infomaniak.ch
66,281 forpsi.com 65,843 forpsi.com
41,628 webreus.nl 41,983 webreus.nl
40,442 active24.com 40,816 pcextreme.nl
40,363 pcextreme.nl 40,094 active24.com
34,985 antagonist.nl 34,527 antagonist.nl
30,298 zxcs.nl 30,427 vevida.com
30,200 vevida.com 29,638 zxcs.nl
29,937 webhostingserver.nl 26,515 web4u.cz
26,412 web4u.cz 25,522 udmedia.de
25,722 udmedia.de 18,409 bhosted.nl
18,438 bhosted.nl 14,660 flexfilter.nl
14,501 flexfilter.nl 14,272 onebit.cz
14,340 onebit.cz 13,133 protonmail.ch
13,807 protonmail.ch 8,151 zonemx.eu
The real numbers are surely larger, because I don't have access to the
full zone data for most ccTLDs, especially .no/.cz/.de/.eu/.be.
Speaking of countries, the IPv4 GeoIP distribution of DANE-enabled MX
hosts shows the below top 20 countries (each unique IP address is
counted, so multi-homed MX hosts are perhaps somewhat over-represented).
This month Last Month
---------- ----------
7,559 TOTAL 7,347 TOTAL
2,386 DE, Germany 2,332 DE, Germany
1,465 US, United States 1,439 US, United States
1,261 NL, Netherlands 1,175 NL, Netherlands
624 FR, France 602 FR, France
293 GB, United Kingdom 289 GB, United Kingdom
236 CZ, Czechia 233 CZ, Czechia
166 CA, Canada 170 CA, Canada
113 FI, Finland 112 FI, Finland
111 SG, Singapore 108 SG, Singapore
99 CH, Switzerland 102 CH, Switzerland
90 SE, Sweden 90 SE, Sweden
79 DK, Denmark 76 DK, Denmark
60 AU, Australia 56 AU, Australia
51 AT, Austria 50 AT, Austria
45 IE, Ireland 46 IE, Ireland
39 IN, India 39 IN, India
39 BR, Brazil 37 JP, Japan
37 RU, Russia 36 BR, Brazil
37 PL, Poland 35 RU, Russia
35 JP, Japan 34 PL, Poland
IPv6 is less common than IPv4 for MX hosts, and the top 20 countries by
DANE MX host IPv6 GeoIP are:
This Month Last month
---------- ----------
4,384 TOTAL 3,786 TOTAL
1,577 DE, Germany 1,549 DE, Germany
1,215 NL, Netherlands 628 NL, Netherlands
598 US, United States 595 US, United States
289 FR, France 280 FR, France
133 CZ, Czechia 139 CZ, Czechia
113 GB, United Kingdom 113 GB, United Kingdom
45 SE, Sweden 49 RU, Russia
45 CH, Switzerland 49 CH, Switzerland
45 CA, Canada 43 CA, Canada
39 SG, Singapore 38 SG, Singapore
36 AT, Austria 36 SE, Sweden
22 RU, Russia 32 AT, Austria
22 IE, Ireland 21 IE, Ireland
19 JP, Japan 20 JP, Japan
18 FI, Finland 16 NO, Norway
16 NO, Norway 16 FI, Finland
15 BR, Brazil 16 DK, Denmark
15 AU, Australia 16 AU, Australia
14 DK, Denmark 14 LV, Latvia
10 UA, Ukraine 14 BR, Brazil
There are 6,721 (6,457 last month) unique zones in which the underlying
MX hosts are found, this counts each of the above providers as just one
zone, so is a measure of the breadth of adoption in terms of
organizations deploying DANE SMTP.
The number of published MX host TLSA RRsets found is 11,089 (9,296 last
month). These cover 11,288 (10,622 last month) distinct MX hosts (some
MX hosts share the same TLSA records through CNAMEs).
The number of DANE domains that at some point were listed in Gmail's
email transparency report is 409 (this is my ad-hoc criterion for a
domain being a large-enough actively used email domain). Of these, 257
are in recent (last 90 days of) reports (see [2] below my signature).
Of the ~2.35 million domains, 13,189 (13,253 last month) have "partial"
TLSA records, that cover only a subset of the (secondary) MX hosts.
While this protects traffic to some of the MX hosts, such domains are
still vulnerable to the usual active attacks via the remaining MX hosts.
The number of domains with incorrect TLSA records or failure to offer
STARTTLS (even though TLSA records are published) stands today at 817
(771 last month). Some of these have additional MX hosts that don't
have broken TLSA records, so mail can still arrive via the remaining MX
hosts.
To avoid email outages, please make sure to monitor the validity of your
own TLSA records, and implement a reliable key rotation procedure. See:
https://dane.sys4.de/common_mistakes
https://github.com/internetstandards/toolbox-wiki/blob/master/DANE-for-SMTP-how-to.md
https://mail.sys4.de/pipermail/dane-users/2018-February/000440.html
https://community.letsencrypt.org/t/please-avoid-3-0-1-and-3-0-2-dane-tlsa-records-with-le-certificates/7022/17
https://mail.sys4.de/pipermail/dane-users/2017-August/000417.html
https://github.com/baknu/DANE-for-SMTP/wiki/2.-Implementation-resources
http://tools.ietf.org/html/rfc7671#section-8.1
http://tools.ietf.org/html/rfc7671#section-8.4
After eliminating parked domains that do not accept email, the number of "real"
email domains with bad DNSSEC support stands at 1491 (1431 last month). The
top 15 name server operators with problem domains are:
This Month Last month
---------- ----------
425 registrar-servers.com 412 registrar-servers.com
406 axc.nl 385 axc.nl
107 movenext.nl 107 movenext.nl
89 ebola.cz 85 ebola.cz
25 tiscomhosting.nl 25 tiscomhosting.nl
25 mijndomein.nl 25 eatserver.nl
24 eatserver.nl 20 epik.com
22 epik.com 18 metaregistrar.nl
17 infracom.nl 18 infracom.nl
15 cloudflare.com 14 cloudflare.com
13 ns01.nl 12 ns01.nl
11 nrdns.nl 12 nrdns.nl
11 iterik.nu 11 sylconia.net
11 accenture.com 11 iterik.nu
10 sylconia.net 10 mobi-net.ch
If anyone has good contacts at some of these providers, please encourage
them to remediate not only the broken domains (I can send them a list),
but also the root cause that makes the breakage possible.
Seven of the domains all whose nameservers have broken denial of existence
appear in the last 120 days of Google transparency reports:
coren-sp.gov.br
trt1.jus.br
trtrj.jus.br
accenturealumni.com
bncr.fi.cr
ofda.gov
sauditelecom.com.sa
--
Viktor.
[1] Some domains deliberately include MX hosts that are always down,
presumably as a hurdle to botnet SMTP code that gives up where real MTAs
might persist. I am not a fan of this type of defence (it can also
impose undue latency on legitimate email). However, provided the dead
hosts still have TLSA records, (which don't need to match anything, just
need to exist and be well-formed) there's no loss of security.
[2] DANE domains appearing in last 90 days of Google Email transparency
reports:
univie.ac.at gmx.de mailplus.nl
gmx.at jpberlin.de markteffectmail.nl
boozyshop.be lrz.de mijnuvt.nl
tjek.be mail.de minbuza.nl
triodos.be mailserver4.de minbzk.nl
clubedohardware.com.br mensa.de mindef.nl
corridaeaventura.com.br mpg.de mkbbelangen.nl
nic.br posteo.de mm1.nl
registro.br ruhr-uni-bochum.de nieuwsservice-rvo.nl
abuse.ch tum.de ns.nl
gmx.ch uni-erlangen.de ouderportaal.nl
hostpoint.ch uni-muenchen.de overheid.nl
infomaniak.ch unitybox.de parlement.nl
open.ch unitymedia.de partijvoordedieren.nl
protonmail.ch web.de pathe.nl
switch.ch westlotto.de politie.nl
altospam.com dfi.dk powerslim.nl
connectsb.com dk-hostmaster.dk pp-prd.nl
datev.com egmontpublishing.dk previder.nl
ecstase.com hormonterapeut.dk rijksoverheid.nl
fmc-na.com netic.dk rotterdam.nl
gmx.com nota.dk ru.nl
habr.com powerhosting.dk rvo.nl
horagames.com star.dk sans-mail.nl
hotelsinduitsland.com tilburguniversity.edu schoudercom.nl
imcnig.com just.ee schuurman-schoenen.nl
infomaniak.com spam-filter.email sportrusten.nl
ingthink.com spike.email ssonet.nl
intakt.com spotler.email stater.nl
joomlapolis.com rediris.es telefoonglaasje.nl
kpn.com triodos.es ticketapp.nl
leszexpertsfle.com uv.es triodos.nl
mail.com inetadmin.eu truetickets.nl
mammoetmail.com zone.eu tweedekamer.nl
matilhadobemadestramento.com zonevs.eu uitgeverijpica.nl
one.com ac-strasbourg.fr utwente.nl
orverkiezing.com bloctel.fr uvt.nl
protonmail.com compagnie-des-sens.fr vu.nl
protonvpn.com kangouroukids.fr xs4all.nl
solvinity.com orsys.fr zorgmail.nl
stater.com srci.fr annabellstefanussen.no
stellarequipment.com fidesz.hu derute.no
t-2.com mszp.hu domeneshop.no
telfort.com interestexplorer.io handelsbanken.no
thalesgroup.com pm.me idrettenonline.no
thepcw.com comcast.net nordicprint.no
triodos.com gmx.net norskgrammatikk.no
ugritone.com habramail.net rushtrampoline.no
veganallsorts.com hr-manager.net uib.no
vitstore.com inexio.net viphuset.no
xfinity.com mijngezondheid.net atelkamera.nu
xfinityhomesecurity.com mpssec.net goget.nu
xfinitymobile.com nedport.net lenhud.nu
active24.cz procurios.net debian.org
akce-incomputer.cz ripe.net freebsd.org
amenit.cz riseup.net gentoo.org
atlas.cz t-2.net ietf.org
blueconsulting.cz transip.net isc.org
centrum.cz triodos.net mailbox.org
cuni.cz xs4all.net mailop.org
isetos.cz 123watches.nl netbsd.org
isportsystem.cz amsterdam.nl openssl.org
itesco.cz awcloud.nl ozlabs.org
klenotyaurum.cz belastingdienst.nl samba.org
klubpevnehozdravi.cz bhosted.nl torproject.org
krypton.cz bhsupport.nl whatpulse.org
omvnovinky.cz bluerail.nl asf.com.pt
onebit.cz boekwinkeltjes.nl boplatssyd-automail.se
optimail.cz bolerolimonadewinkel.nl digitaltolk.se
poptavej.cz boozyshop.nl ecster.se
reserved.cz burgernet.nl ekokul.se
smtp.cz buzaservices.nl handelsbanken.se
vas-server.cz cbr.nl loopia.se
vcelka.cz chipbizz.nl minmyndighetspost.se
virusfree.cz corpoflow.nl nordicprint.se
volny.cz derooijfotografie.nl personligalmanacka.se
zdravestravovani.cz dictu.nl skatteverket.se
bayern.de digid.nl teknikdelar.se
brandenburg.de duo.nl theletter.se
bund.de efactuurdirect.nl websupport.se
bundesregierung.de ezorg.nl kadernickyservis.sk
datev.de gerryweber.nl triodos.co.uk
dfn.de hostingpeople.nl govtrack.us
elster.de hr.nl quantum-services.us
fau.de hro.nl ru.ac.za
freenet.de interim-netwerk.nl
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