[dns-operations] Acceptable query limit to root servers

David Conrad drc at virtualized.org
Tue Jun 7 17:32:58 UTC 2016


On Jun 7, 2016, at 8:12 AM, Andrew White <andrew at vivalibre.com> wrote:
> We are considering adding some health checks on our recursive DNS platform.
> We'd like to ensure each server has access to the root via a remote dig at the recursive server. Specifically we are considering a query to an effectively random top-level domain that should always be answered by an NXDOMAIN by a root server.
> Given the large number of servers and our need to perform this check fairly often, this could result in a large number of queries resulting in NXDOMAIN to the root.

Not that it's likely your probes will go above the noise in the noise, why not mirror the root (a la https://tools.ietf.org/rfc/rfc7706.txt)?

(speaking only for myself)

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