ACME DNS Validation

Christof Meerwald from blog

I was looking at modifying acme tiny to support DNS-01 validation with a custom PowerDNS backend just a few days ago (in my case to get certificates for an XMPP server where there isn't a corresponding HTTP server or the HTTP server is hosted on a different machine). This work is available from Subversion: pdns-acme-backend.

Interestingly, I am just reading that Let's Encrypt is now supporting wildcard certificates that need to be validated using the DNS-01 challenge type.