Am 25.02.21 um 10:51 schrieb Florian Weimer:
Why do you think that?
Caching DNS server availability is a commonly requested feature even in
data center deployments. The way Fedora currently implements its DNS
client, it more or less defeats the built-in high availability mechanism
of DNS, and complex network-based mitigations are needed (like using
anycast DNS resolvers).
If you run a server farm with mailservers, you usually have antispam
services like spamhaus enabled.
If one server from an ip adressrange is using spamhaus, spamhaus is fine
with it.
If a hundret ips from that ip addressrange ask spamhaus, you get blocked
quite fast.
The cache on the server itself, is of limit use here. Thats why you use
a central dns cache on one server,
so anyone benefits from the caching and spamhaus is happy : win-win.
On a desktop / laptop you won't have such a scenario in the first place,
here local caching makes more sense.
best regards,
Marius Schwarz
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