Troubleshooting Let's Encrypt SSL renewal failures

POSTED BY: webmaster_pro ACTIVE_MEMBER POSTED ON: Jun 09, 2026 CATEGORY: GENERAL

My Let's Encrypt SSL certificate failed to renew automatically. The log shows challenge verification failed on port 80.

15 Total Upvotes

REPLIES (1)

nginx_guru ACTIVE_MEMBER SOLUTION_ACCEPTED 2026.06.10 04:50

Ensure port 80 is not blocked or redirected to HTTPS prematurely. You can run `sudo /usr/bin/booston-core renew_letsencrypt_ssl [domain]` manually to check debug outputs and verify the HTTP-01 webroot challenge mapping.

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