Hi, On 8/15/18 10:36 AM, hariesfa wrote: > I assume this mechanism is a feature that powerdns has, to protect > server resources. But, is there a way to reconfigure this throttling > mechanism ? I have tried to decrease server-down-throttle-time by hoping > that once the authoritative answered my query, powerdns will keep the > record in its cache.
You can indeed try tuning server-down-throttle-time and server-down-max-fails, but these servers are so broken that it seems to me that the result will always be impossible to predict. You are right, however, if we somehow manage to get the answer at least once, we will keep it in cache for a while, depending on the TTL and your cache settings. > Because, if i try to use other dns recursor software, they can resolve > this domain. Some recursor implementations are known to try very hard to resolve broken domains, and sometimes they manage to. PowerDNS Recursor, on the other hand, tries not to waste resources dealing with clearly broken domains and/or servers, and we have seen time and time again that it makes a lot of difference in resource-constrained situations, like when you are under some kind of attack. Best regards, -- Remi Gacogne PowerDNS.COM BV - https://www.powerdns.com/
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