Things were getting really slow with so much upstream DNS rate limiting, that I just took the plunge and migrated my Pi-Hole configuration from OpenDNS to Quad9. It's not perfect, but it's better (for now, until they decide to rate limit as well). Still need to do further investigation to understand what I am losing or gaining with that change, in what regards to filtering.
Bonus points: I never realized that Pi-Hole doesn't know that home.arpa is officially considered a local DNS zone, so it was forwarding queries to upstream as well. This is now blocked, so suddenly everything got a lot faster.
@bekopharm This is the first time I hear of home.arpa. RFC: rfc-editor.org/rfc/rfc8375.htm…
"This document specifies the behavior that is expected from the Domain Name System with regard to DNS queries for names ending with '.home.arpa.' and designates this domain as a special-use domain name. 'home.arpa.' is designated for non-unique use in residential home networks. The Home Networking Control Protocol (HNCP) is updated to use the 'home.arpa.' domain instead of '.home'."
@sindarina
....and don't use .local at home either. Learn about home.arpa
@lo48576 “Although this document makes specific reference to [RFC7788], it is not intended that the use of 'home.arpa.' be restricted solely to networks where HNCP is deployed. Rather, 'home.arpa.' is intended to be the correct domain for uses like the one described for '.home' in [RFC7788]: local name service in residential homenets.”
home.arpa. は reserved だから LAN 内で使えるかと思ったけど、これ Home Networking Control Protocol 用であって汎用的な内部利用用途ではなさそうな感じだな……
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