Could this possibly be the same as the problem I'm encountering with OCSP
response for the SERPRO test site (OCSP response not found) when I run this
command?

curl --verbose --url
http://ocsp.serpro.gov.br/acserprosslv1/ME4wTDBKMEgwRjAJBgUrDgMCGgUABBTBQ28pKtiXfAbGW%2BhUsNmqSdcYRQQUrRZPS%2FEMvsKKooUY1w1GJZMi480CDQDzmwGvO97JMnso57k%3D

(Using instructions from https://unmitigatedrisk.com/?p=42)

See also
https://certificate.revocationcheck.com/active-repositorio.serpro.gov.br

Thanks,

Ben


On Thu, Oct 7, 2021 at 6:42 PM 'Jacob Hoffman-Andrews' via
[email protected] <[email protected]> wrote:

> Good advice, thanks for sharing! People interested in this may also be
> interested in reading Let's Encrypt's 2017 postmortem related to the same
> issue:
> https://community.letsencrypt.org/t/may-19-2017-ocsp-and-issuance-outage-postmortem/34922.
> Another interesting thing: concatenation happens without regard to whether
> the OCSP URL in a certificate has a trailing slash. If you issue
> certificates where the OCSP URL ends in a trailing slash (rare, I think),
> you'll find that all of your OCSP GET requests start with a doubled slash
> (//). Also, it's worth being cautious about deploying changes that will
> cause large numbers of cache entries to be invalidated.
>
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