On Sat, Mar 09, 2024 at 07:21:53PM +0100, Joachim Lindenberg via Postfix-users
wrote:
> I thought almost all cloud providers use anycast these days,
> elminating the need to serve different IPs per region.
No. That's not the case. Anycast is a useful tool, but isn't the whole
story. The responses vary by location and over time within the same
location.
- NYC:
$ dig +short -t a www.google.com
142.250.65.196
... a few minutes later ...
$ dig +short -t a www.google.com
142.250.176.196
- LAX:
$ dig +short -t a www.google.com
142.250.72.132
... a few minutes later ...
$ dig +short -t a www.google.com
142.250.188.228
- MEL:
$ dig +short -t a www.google.com
142.250.70.228
- MUC:
$ dig +short -t a www.google.com
142.250.186.164
--
Viktor.
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