[dns-operations] rate-limiting state

Tony Finch dot at dotat.at
Fri Feb 7 14:56:55 UTC 2014

David C Lawrence <tale at akamai.com> wrote:
> Maybe Patrick glossed over the mere "1000 qps", which for many (most?
> hand-waving) operators doesn't even blip as an attack.  At the
> attack-level traffic to which he is accustomed, the inbound requests
> can easily surpass the server's ability to generate responses even if
> it ends up not sending most of them.

At that point the name server itself is the victim, and there isn't
anything it can do about the attack - DDoS mitigation has to happen well
upstream of the victim.

I picked 1000pps because it is enough to trigger RRL without killing the

f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
Forties, Cromarty: East, veering southeast, 4 or 5, occasionally 6 at first.
Rough, becoming slight or moderate. Showers, rain at first. Moderate or good,
occasionally poor at first.

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