Hahaha yeah, thanks Residential ISPs, your DNS sucks. I always found a
better caching resolver, like UUNET, until Verizon got better at it, and
then Google DNS came along.
The caches have cleared.
Beckman
On Thu, 20 Jan 2022, Alex Balashov wrote:
Why, back in my day, residential ISPs would ignore your TTLs and cache for 3 days no matter what you did…
Kids these days.
— Alex
On Jan 20, 2022, at 7:54 PM, Peter Beckman <beck...@angryox.com> wrote:
Please, y'all -- when doing a DNS migration, ensure 1000% that your DNS
records on your old DNS provider match your DNS records on your new DNS
provider, and plan your DNS migration early by setting the TTL for your NS
records at least to 5 minutes (300 seconds) if allowed, 30 seconds if you
can.
Assume all caching servers will cache for 5 minutes even if you set it to
30 seconds.
At least that way if things go wrong, your outage horizon is 5 minutes, not
1 hour or more!!!
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
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