Comment Comment by yourad_io > but now that I learned that SERVFAIL is not cached on [...] intermediate DNS servers [0]I thought so too, but at least some do cache according to Cloudflare's blog post:> Consequently, 1.1.1.1, 8.8.8.8, and other major public DNS resolvers started issuing (and caching) SERVFAIL responses.https://blog.cloudflare.com/october-2021-facebook-outage/ parent yourad_io 5 years ago
I thought so too, but at least some do cache according to Cloudflare's blog post:
> Consequently, 1.1.1.1, 8.8.8.8, and other major public DNS resolvers started issuing (and caching) SERVFAIL responses.
https://blog.cloudflare.com/october-2021-facebook-outage/