Update on stats 2017-06
Viktor Dukhovni
ietf-dane at dukhovni.org
Fri Jun 30 22:09:46 CEST 2017
As of today I count 171460 domains with correct DANE TLSA records
for SMTP. As expected the bulk of the DANE domains are hosted the
handful of DNS/hosting providers who've enabled DANE support in
bulk for the domains they host. The top 10 MX host providers by
domain count are:
69368 domeneshop.no
59835 transip.nl
18351 udmedia.de
6665 bhosted.nl
1820 nederhost.net
1007 ec-elements.com
1001 networking4all.net
514 core-networks.de
375 omc-mail.com
364 yourdomainprovider.net
The real numbers are surely larger, because I don't have access to
the full zone data for most ccTLDs, especially .no/.nl/.de.
There are 2615 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 servers
deployed. Alternatively, a similar number is seen in the count
(2707) of distinct MX host server certificates that support the
same ~171000 domains.
A related number is 3955 TLSA RRsets found for MX host TCP port
25. This includes secondary MX hosts and domains none of whose
primary MX hosts have TLSA records.
The number of domains that at some point were listed in Gmail's
email transparency report is 111 (this is my ad-hoc criterion for
a domain being a large-enough actively used email domain). Of
these, 54 are in recent reports:
anubisnetworks.com gmx.net posteo.de
asf.com.pt hr-manager.net registro.br
asp4all.nl ietf.org ruhr-uni-bochum.de
bayern.de isc.org samba.org
bund.de jpberlin.de solvinity.com
comcast.net lrz.de t-2.net
dd24.net mail.com tilburguniversity.ed
debian.org mail.de torproject.org
domeneshop.no mpssec.net trashmail.com
elster.de netbsd.org tum.de
enron.email nic.br uni-erlangen.de
fau.de octopuce.fr unitymedia.de
freebsd.org open.ch uvt.nl
gentoo.org openssl.org web.de
gmx.at otvi.nl webcruitermail.no
gmx.ch ouderportaal.nl xfinity.com
gmx.com overheid.nl xs4all.net
gmx.de pathe.nl xs4all.nl
Of the ~171000 domains, 835 have "partial" TLSA records, that cover
only a subset of the 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
advertise STARTTLS (even though TLSA records are published) stands
today at 108. Below is a list of the 53 underlying MX hosts that
serve these domains and whose TLSA records don't match reality:
Hall of Shame:
mail.dipietro.id.au mx1.spamsponge.de dorothy.goldenhairdafo.net
eumembers.stansoft.bg smtp2.strotmann.de oostergo.net
catabra.com.br mx.thorko.de cinnamon.nl
mail.pgp.inf.br smtp.flipmail.es mail.e-rave.nl
mail.danmolik.com mail.0pc.eu mail.jekuiken.nl
mail.digitalwebpros.com gamepixel.eu mail.myzt.nl
demo.liveconfig.com mx.quentindavid.fr bounder.steelyard.nl
intranet.nctechcenter.com servmail.fr beerstra.org
ny-do.pieterpottie.com mail.nonoserver.info eumembers.datacentrix.org
diablo.sgt.com mail.bax.is smtp3.amadigi.ovh
tusk.sgt.com mail.lsd.is itaskmanager.ovh
mx1.wittsend.com mail.laukas.lt mail.pasion.ro
mx.bels.cz mx.datenknoten.me mail.lahl.rocks
gaia.nfx.cz mx.giesen.me puggan.se
badf00d.de mail.castleturing.net mail.rostit.se
mail.denniseffing.de mail.culm.net protector.rajmax.si
mail.manima.de datawebb.dafcorp.net email.themcintyres.us
www.mtg.de anubis.delphij.net
The number of domains with bad DNSSEC support is 423. The top 10
DNS providers with problem domains are:
68 jsr-it.nl
53 infracom.nl - Was slated to be resolved in March, delayed...
25 tiscomhosting.nl
25 active24.cz
15 rdw.nl
15 firstfind.nl
11 loopia.se
10 metaregistrar.nl
9 cas-com.net
8 ovh.net
7 ignum.com
Around 50 of the broken domains have at least one working nameserver,
and so are email-reachable, given enough retries. Only 6 of the
DNS-broken domains appear in historical Google Email transparency
reports:
tiviths.com.br
tre-sp.jus.br
trt1.jus.br
trtrj.jus.br
tse.jus.br
rzd.ru
The associated DNS lookup issues are:
_25._tcp.mx.tiviths.com.br. IN TLSA ? ; TLSA non-response: http://dnsviz.net/d/_25._tcp.mx.tiviths.com.br/dnssec/
_25._tcp.mx1.trt1.jus.br. IN TLSA ? ; zone signature failure: http://dnsviz.net/d/_25._tcp.mx1.trt1.jus.br/dnssec/
_25._tcp.mx1.trtrj.jus.br. IN TLSA ? ; zone signature failure: http://dnsviz.net/d/_25._tcp.mx1.trtrj.jus.br/dnssec/
_25._tcp.dexter.tse.jus.br. IN TLSA ? ; TLSA non-response: http://dnsviz.net/d/_25._tcp.dexter.tse.jus.br/dnssec/
_25._tcp.lalavava.tse.jus.br. IN TLSA ? ; TLSA non-response: http://dnsviz.net/d/_25._tcp.lalavava.tse.jus.br/dnssec/
_25._tcp.mandark.tse.jus.br. IN TLSA ? ; TLSA non-response: http://dnsviz.net/d/_25._tcp.mandark.tse.jus.br/dnssec/
_25._tcp.ims1.rzd.ru. IN TLSA ? ; TLSA non-response: http://dnsviz.net/d/_25._tcp.ims1.rzd.ru/dnssec/
_25._tcp.ims2.rzd.ru. IN TLSA ? ; TLSA non-response: http://dnsviz.net/d/_25._tcp.ims2.rzd.ru/dnssec/
[ See <https://tools.ietf.org/html/draft-ietf-dnsop-no-response-issue-08>,
Much of the TLSA non-response issue seems to be related to a
"feature" of Arbor Networks firewalls, that enables droping of
DNS requests for all but the most common RRtypes. Do not make
the mistake of enabling this firewall "feature". ]
The oldest outstanding DNS issue is another SOA signature issue
at truman.edu dating back to Nov/2014:
http://dnsviz.net/d/_25._tcp.barracuda.truman.edu/VGzORw/dnssec/
I hope some day soon they'll start missing email they care about
and take the time to resolve the problem.
--
Viktor.
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