My nginx server gets OCSP errors for several days now. I'm not sure if the OCSP responder is unstable or never works.
Example log lines:
2021/01/07 13:11:08 [error] 20866#20866: recv() failed (110: Connection timed out) while requesting certificate status, responder: ocsp.int-x3.letsencrypt.org, peer: 23.55.163.68:80, certificate: "/etc/nginx/ssl/ipv6.ipv6-test.molitor-dietzel.de.crt"
2021/01/07 13:11:08 [error] 20866#20866: OCSP responder prematurely closed connection while requesting certificate status, responder: ocsp.int-x3.letsencrypt.org, peer: 23.55.163.68:80, certificate: "/etc/nginx/ssl/ipv6.ipv6-test.molitor-dietzel.de.crt"
2021/01/07 13:11:16 [error] 20866#20866: recv() failed (110: Connection timed out) while requesting certificate status, responder: r3.o.lencr.org, peer: 23.55.163.58:80, certificate: "/etc/nginx/ssl/bad.tlsa.molitor-dietzel.de.crt"
2021/01/07 13:11:16 [error] 20866#20866: OCSP responder prematurely closed connection while requesting certificate status, responder: r3.o.lencr.org, peer: 23.55.163.58:80, certificate: "/etc/nginx/ssl/bad.tlsa.molitor-dietzel.de.crt"