CNAME record redirection

Question

Hello
i have deployed Redcap Cloudformation in ELB in a hosted zone example.net and my application is pointed to staging.example.net and it works perfectly.
i have another hosted zone name mydomaine.org and would like to redirect prod.mydomaine.org to staging.example.net. 
What's the best practice ?
i tried several configurations without success. When i try to reach the website prod.mydomaine.org i get connection refused error on the browser.
The Redcap Cloudformation generate certificate if this information can help to debug
Thanks

Accepted Answer

The first thing to check is to make sure that your DNS is working. You can do this with `nslookup` or `dig` or there are many third-party tools - just make sure that `prod.mydomaine.org` resolves to `staging.example.net` and then to the IP address of the ELB.

Next, if you're using HTTPS the ELB must offer both certificates. That's because the browser will try to connect to `prod.mydomaine.org` but the ELB doesn't know that the connection has been redirected from there. If it is expecting the browser to connect to `staging.example.net` that's the certificate that it will offer. And the browser doesn't know about `staging.example.net` so it will throw an error about certificates being invalid.

[This blog post](https://aws.amazon.com/premiumsupport/knowledge-center/acm-add-domain-certificates-elb/) covers multiple certificates using AWS Certificate Manager but it might help you with your custom certificate.

CNAME record redirection

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