Kabel Deutschland breaks DNS System for it’s customers

Last week I noticed, that Kabel Deutschland, a cable provider in germany, returns for any non existing hosts “204.9.89.60″. It seems, thats it is rolled out since last fall. Even for DNSSEC enabled infrastructure it breaks it totally:

; <<>> DiG 9.3.4 <<>> +dnssec web.pixaco.se @83.169.184.161
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; ANSWER SECTION:
web.pixaco.se. 0 IN A 204.9.89.60

Beside that, this behavour breaks the whole DNS, since many mechanism rely on a negative answer. The most visible effect for the users is, that when having a typo on surfing, he will forwarded to http://suche.kabeldeutschland.de/de.kde.assist/?domain=<domainyoutypedinyourprompt>. Since 204.9.88.0/21 is located at our transatlantic friends from US, there might be some problem with leaking privacy informations. I don’t feel happy, if I had a typo in my URL and getting listed for it on any terror list or providing the newest porno links to my american friends inside the organisations with the tree capitals.

All that for getting some extra money, but racing pricedumping for connectivity, this sucks a lot.
If you are a customer and feel pissed, you can send a friendly note to them:

Kabel Deutschland Vertrieb und Service GmbH & Co. KG
Beschwerdestelle
99116 Erfurt
kundenservice@kabeldeutschland.de
Fax: 01805299925

A quick and dirty workaround for dnsmasq maybe to add “bogus-nxdomain=204.9.89.60″ to your config file. This doesn’t fix the DNSSEC problem.
The problem also pops up at dns-operations and there are traces at google too.

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5 Responses to “Kabel Deutschland breaks DNS System for it’s customers”


  1. 1 Henrik

    You may want to switch to OpenDNS. I did so a while back after getting tired of the frequent outages of my ISPs DNS servers, and it works quite well.

  2. 2 nnonix

    OpenDNS does the same thing. It breaks DNS.

  3. 3 cyco

    Using other dns servers isn’t what you want to use, if you aren’t maintain them yourself. In my personal case I’ve a couple of options, but has a normal user such?

  4. 4 cyco

    Okay … I’ve heared rumouring, that OpenDNS does something similar like KD. Could you be a bit verbose?

  5. 5 Henrik

    You can turn off the redirects in OpenDNS. They do do it by default tough.

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