8 Aug
2025
8 Aug
'25
8:04 a.m.
Do you have any recommendations for recursive DNS servers for a medium sized (20-30k users) ISP. We have used powerdns and unbound but sometimes find the caching times a bit on upper side. Any suggestions between these two or anything new? I've been happy with PowerDNS Recursor. What sort of latency were you seeing in it and at what loading?
I wonder if we're trying to answer the wrong question. "sometimes find the caching times a bit on upper side" could certainly be interpreted to refer to caching according to the TTL specified for the zone on the *authoritative* server. If so - it's possible that the user simply needs to be able to specify a maximum TTL, independent of the setting on the authoritative server. Steinar Haug, AS2116