Too many requests from GET


We do receive responses 429 TooManyRequest responses from Lets Encrypt API.
Response body
{"type": "urn:ietf:params:acme:error:rateLimited", "detail": "Rate limit for '/directory' reached"}
{"type": "urn:ietf:params:acme:error:rateLimited", "detail": "Rate limit for '/acme' reached"}

We do not send more requests than usual (for sure below 1 request per second)

In the documentation it is said:

" The “/directory” endpoint and the “/acme” directory & subdirectories have an Overall Requests limit of 40 requests per second."

Does it mean 40 requests per second for all LetsEncrypt users? From all IPs?

I'm not entirely sure as it's not properly documented and I can't find it in the Boulder source, but I think this is per IP address.


Thank you for your response!
Seems that problem disappeared,
I didn't see any errors since 2 PM UTC (the problem started at 11 AM UTC). We did not change anything.

In our logs, I see that we had approximately 1 request per 4 to 5 seconds. And approximately 1 out of 4 requests failed. I will monitor it more.


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