Hi,
I post on this topic because I think we have also our public IP blocked when we try re-new certificate : like @david-at-heroku , the return of my command
openssl s_client -connect acme-v02.api.letsencrypt.org:443
is
write:errno=104
CONNECTED(00000003)
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 289 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
@JamesLE please can you check if this IP is blocked and unlock it if needed :
54.36.114.229
Thanks a lot.