[dns-operations] Google DNS used as amplification - aren't they caching?
lutz at iks-jena.de
Wed Aug 6 16:23:36 UTC 2014
* Paul Wouters wrote:
> It seems that the nsd ratelimits to send TC=1 isn't working well either
> to reduce the incoming amount of UDP queries.
> Why does google dns seems so inefficient at caching?
I can second this. With rate limiting and dampening (at my side) I get
customer complains, that the Google webmaster tools report an unreachability
of the DNS servers (about 5%).
OTOH there are customers which use Google public DNS and do have sporadic
resolving problems "Internet is not working! We can't even access our own
And this is true: Google IP ranges hit the dampening limits several times
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