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A comment on Every device with FB app is now DDoSing recursive DNS resolvers. Parent comment

Re:Every device with FB app is now DDoSing recursive DNS res... by daper on Tuesday October 05, 2021 @03:52AM (#28756556)
As I understand my favorite resolver - unbound - has separate "infra" cache that also caches RTT times, and "down" status of name servers:

https://nlnetlabs.nl/documentation/unbound/unbound.conf/#inf...

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