Let's Encrypt for Internal-Only Web Management

OK, so you switched your Hosting Service Provider (HSP).
But who is your DNS Service Provider (DSP)?
HSPs and DSPs are not mutually inclusive.
For instance, you could quite easily switch to use Cloudflare DNS (as your DSP only).
[you aren't forced to use their CDN - think: without ever changing any of your IPs]
I see: DNS-Cloudflare on the list.

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