My domain is: gate.ru
Hello
We want to create a lot of domains like {domain}.wp.gate.ru
I’ve read that Let’s Encrypt limit is Certificates per Registered Domain (50 per week).
What is a registered domain in our case? Is it means that we can use let’s encrypt only for 50 domain like {domain}.wp.gate.com per week?
The Registered Domain in your case is gate.com / gate.ru. And yes, it means you can only get 50 certificates per week for new subdomains (excluding renewals).
If you are creating some sort of hosting platform using your *.wp.gate.ru domain, then you may apply for a rate limit exemption based on that domain and/or your ACME account.
You can find the link to apply for an exemption on this page: https://letsencrypt.org/docs/rate-limits/#a-id-overrides-a-overrides . It usually takes a few weeks to get a response.
You can also just try using a single wildcard certificate for *.wp.gate.ru, and using that to protect all of your domains.
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