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Limited DNS server with RESTful HTTP API to handle ACME DNS challenges easily and securely.
Many DNS servers do not provide an API to enable automation for the ACME DNS challenges. Those which do, give the keys way too much power. Leaving the keys laying around your random boxes is too often a requirement to have a meaningful process automation.
Acme-dns provides a simple API exclusively for TXT record updates and should be used with ACME magic "_acme-challenge" - subdomain CNAME records. This way, in the unfortunate exposure of API keys, the effects are limited to the subdomain TXT record in question.
Let's Encrypt client and ACME library written in Go.
An ACME-based certificate authority, written in Go.
This is an implementation of an ACME-based CA. The ACME protocol allows the CA to automatically verify that an applicant for a certificate actually controls an identifier, and allows domain holders to issue and revoke certificates for their domains. Boulder is the software that runs Let's Encrypt.
The HTTP/2 Web Server with Fully Managed TLS (automatic HTTPS).
Caddy 2 is a powerful, enterprise-ready, open source web server with automatic HTTPS written in Go