[dns-operations] ultradns problems on udns[12].ultradns.net? (amazon.co.uk hard to resolve)

Jaap Akkerhuis jaap at NLnetLabs.nl
Mon Jun 25 09:05:30 UTC 2007

    Now I understood that ultradns uses anycast, so I assume this
    is a rather large scale DoS effort.

I don't want to speculate what the cause was, but it seems that a
couple of untradns servers did had some problems during that time
according to


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