[Pdns-users] Recursor: NS selection logic, multiple IPs in forward-zones statement

[Andrey Vishnyakov]

Hi!

What is the logic of pdns recursor choosing NS server when multiple items
are available like multiple IP addresses in a forward-zones statement?

Looking through the source code I see that NS servers are being ordered by
speed or response time (usec).  What is the overall algorithm? How often
resolver does a probing of multiple NS, etc.? Can we somehow configure this
logic?

Best regards,
Andrey
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