# The Certificate Authority failed to download the temporary challenge files created by Certbot -- Connection refused **URL:** \ **Category:** Help\ **Created:** [September 8, 2021, 1:29pm UTC](https://community.letsencrypt.org/t/the-certificate-authority-failed-to-download-the-temporary-challenge-files-created-by-certbot-connection-refused/159426 "2021-09-08T13:29:10Z")\ **Posts on this page:** 1\ **Showing post:** 26
**Author:** ![Elabbasy00](https://avatars.discourse-cdn.com/v4/letter/e/dbc845/32.png) [@Elabbasy00](https://community.letsencrypt.org/u/Elabbasy00)\ **Post date:** [September 9, 2021, 1:39am UTC](https://community.letsencrypt.org/t/the-certificate-authority-failed-to-download-the-temporary-challenge-files-created-by-certbot-connection-refused/159426/26 "2021-09-09T01:39:25Z")
> [@MikeMcQ](#): > > Yeah, I saw that but his answer did not provide clarity on that matter 🙂 I apologize for the time, but I was trying to reduce the burden and solve the problem myself, but it was no use > nginx\_1 | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration > nginx\_1 | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ > nginx\_1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh > nginx\_1 | 10-listen-on-ipv6-by-default.sh: Getting the checksum of /etc/nginx/conf.d/default.conf > nginx\_1 | 10-listen-on-ipv6-by-default.sh: /etc/nginx/conf.d/default.conf differs from the packages version, exiting > nginx\_1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh > nginx\_1 | /docker-entrypoint.sh: Configuration complete; ready for start up --- _[View the full topic](https://community.letsencrypt.org/t/the-certificate-authority-failed-to-download-the-temporary-challenge-files-created-by-certbot-connection-refused/159426)._