[Pdns-dev] [dns-operations] dns response rate limiting (DNS RRL) patch available for testing

Marc Haber mh+pdns-dev at zugschlus.de
Sat Jun 16 14:28:14 CEST 2012

On Thu, Jun 14, 2012 at 10:55:45AM +0200, Peter van Dijk wrote:
> On Jun 14, 2012, at 10:28 , Ask Bjørn Hansen wrote:
> > This would be a nice feature to have in PowerDNS, too.
> I have a PowerDNS branch that allows a Lua hook to be called before processing of any query: https://github.com/Habbie/powerdns/compare/master...lua-prequery
> I'm thinking building the filtering in Lua (performance permitting) would be an interesting exercise in configurability.
> Thoughts?

Please don't do this in a way that harms performance. I know of at
least one site that gets tens of thousands of queries per seconds on
authoritative servers, about 90 % of them abusive at times, and that
would love to have a per-IP rate limit implemented inside PowerDNS so
that one could get rid of the iptables-based rate limit that is in
place at the moment.


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