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Caddy: enabling valid internal SSL certificates with ACME DNS challenge

ID: 06b9db02-0344-5b1b-aa72-6b5868aa0702

STIX ID: report--06b9db02-0344-5b1b-aa72-6b5868aa0702

Feed Name: KMsec blog

Date Published: 2021-08-06

Date Updated: 2026-04-19

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This is a step-by-step how-to guide showing how to provision valid SSL/TLS certificates for Docker-hosted services in a private homelab using Caddy with the ACME DNS challenge (DigitalOcean DNS provider), including building a custom Caddy image with the DigitalOcean DNS module, configuring dnsmasq wildcard DNS, example docker-compose and Caddyfile entries, testing, and reload procedures.

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