DNS CNAME Record not working, but target's working

[user92818]

What is the name of the domain?

api-guide.voilà.app

What is the error number?

canceled

What is the error message?

This site can’t be reached api-guide.voilà.app unexpectedly closed the connection.

What is the issue you’re encountering

I created a CNAME record for api-guide.voilà.app to redirect to https://voila-guide.fly.dev/. https://voila-guide.fly.dev/ is working well but api-guide.voilà.app is still unreachable.

What feature, service or problem is this related to?

DNS records

[sjr]

CNAMEs don’t redirect, they only return the same IP address as the target.

If you want to redirect then you need to create a Redirect Rule…

Create a redirect rule in the dashboard | Cloudflare Rules docs

Make sure it has a DNS record, use proxied AAAA 100:: if you are just redirecting.

If you are using the CNAME correctly to point at the same server as the other domain, then can you show a screenshot of your Cloudflare DNS records.

[user92818]

Yess sorry for the confusion.
I’m using the CNAME (api-guide) to correctly point at the same server as the other domain (https://voila-guide.fly.dev/).
Here’s a screenshot of api-guide DNS config:

[sjr]

It is resolving ok…
https://cf.sjr.org.uk/tools/check?d180d0e0cce442298beb009500cb666e#dns

Make sure the voila-guide.fly.dev is configured to answer for api-guide.xn--voil-3na.app.

[user92818]

Thank you for your help, you were right, the problem came from api-guide.xn--voil-3na.app not having the certificate.