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I wrote a small go app[0] which is invoked every 15 minutes and updates the DNS through the cloudflare API. Its very specific for my use case and ISP but works

• 3np 6y ago
  Cool! There's also certbot[0] and lego[1] which can do ACME-DNS with a range of providers beside CF. You could also do tls-alpn, which allows you to do do the challenger encrypted on another port. Sounds like DNS works fine for you, but it's primarily worth considering for those issuing certs for non-public names that shouldn't be broadcasted via public DNS. [0]: https://github.com/certbot/certbot https://github.com/certbot/certbot [1]: https://github.com/go-acme/lego https://github.com/go-acme/lego