Too many requests from GET https://acme-v02.api.letsencrypt.org/directory

Issuance Tech
1

Hi!

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"}
or
{"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?

2

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.

3

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.