I’ve been successfully using Cloudflare DNS & Origin certs along w/ Nginx to proxy sites for my domain as well as subdomains of my domain.
I recently decided I’d like to add an additional level of subdomains (for example, test.app.mydomain.com), but after configuring a DNS record for it as well as adding the correct Nginx proxy record, I receive the following error when navigating to the site:
The connection for this site is not secure
**test.app.<mydomain.com>** uses an unsupported protocol.
Can I get around this by using an external certificate authority (Let’s Encrypt), or is that fact that I’ll still be using Cloudflare for DNS and tunneling still prevent me from not having to pay for additional subdomain levels?