On Fri, Aug 08, 2025 at 12:44:40AM +0000, DurgaPrasad - DatasoftComnet via 
NANOG wrote:
> Do you have any recommendations for recursive DNS servers for a medium sized 
> (20-30k users) ISP.

Yes.  ISC BIND, running on OpenBSD.  Performs well on minimal hardware,
plus the OpenBSD firewall implementation ("pf") is excellent.  And since
both can be configured and operated from the command line, this setup
readily lends itself to revision control, scripting, and synchronization.

---rsk
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