On Tue, Aug 26, 2025 at 02:39:00PM +0200, Stephane Bortzmeyer via dnsdist <[email protected]> wrote a message of 20 lines which said:
> > My resolver suffers under the many "NS ." requests it receives. I > > > topQueries(30) > 1 . 7906 39.5% > > Which is probably not normal. Other details: Version of dnsdist: > showVersion() dnsdist 2.0.0 The cache <https://www.dnsdist.org/guides/cache.html> is not full: > getPool(""):getCache():printStats() Entries: 121594/1000000 Hits: 50055 Misses: 224003 Deferred inserts: 64 Deferred lookups: 13 Lookup Collisions: 11 Insert Collisions: 6 TTL Too Shorts: 0 Cleanup Count: 60 topClients() show many requests from a given subnetwork. Adding <https://www.dnsdist.org/reference/config.html#addDynamicBlock>: addDynamicBlock('[CENSORED]:2500::','Too many requests', DNSAction.Refused, 86400, 40) limits the used bandwidth (as shown by topBandwidth()) but not the CPU use (almost 100 % most of the time). _______________________________________________ dnsdist mailing list [email protected] https://mailman.powerdns.com/mailman/listinfo/dnsdist
