I am trying to install a certificate for https://mail.dfiel.com. When I try to use
--apache I get this error:
Failed authorization procedure. mail.dfiel.com (tls-sni-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: Failed to connect to host for DVSNI challenge
I am going to assume this is coming from the fact that this is a reverse proxy server. Each subdomain has ProxyPass rules to move most domains to my IIS server, but some to Exchange (this domain) and some special applications are routed elsewhere.
How can I use ProxyPass, but still complete the verification portion of Let’s Encrypt?