[Pdns-users] Recursor: Black list

ktm at rice.edu ktm at rice.edu
Fri Oct 17 16:35:38 UTC 2014

> > Hi Ciro,
> >
> > We used a CDB key value store. It was easy to use/update and had
> > very good performance. "grepping" is O(n*n) so it will tank as
> > your list grows and you really don't want to slow down your DNS
> > lookups.
> >
> > Regards,
> > Ken
> Hi Ken, I'll look at the LUA+CDB mix given it seems more elegant, any
> document specific for PDNS you can point me to?
> Regards,!


No PDNS specific documentation, we used the CDB map to allow the
blacklist to be update without needing to restart the recursor
and lose all the cached DNS lookups. We wrote a function similar
to the example Lua script using a CDB map instead.


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