The first added record a1.testdomain.com works as expected - I can ping it and when go to it with the browser I get the correct response.
Second and third records didn’t work. The second and third records a2.testdomain.com and a3.testdomain.com are pointing to an unknown IP address, probably a Cloudflare proxy server?!
When I try them on the browser, It gives me page not working. It is not resolving to the correct IP.
Is there something else I need to do? It’s been about 1 hour but no luck. Will this be updated after a few hours? Or, is there a step I missed?
Seems like those 2 sub-domains didn’t yet got/generated an SSL certificate at your origin host/server, or if you are using cPanel then it’s not generated (via AutoSSL).
If so, make sure both sub-domains are temporary unproxied and set to (DNS-only).
Wait for a few minutes, then generate an SSL certificate for them.
After you confirm they are working fine over the secured HTTPS connection, switch back to proxied and .
Set SSL/TLS to Full (Strict) SSL at Cloudflare.
From the screenshot you’ve posted, ERR_TOO_MANY_REDIRECTS indicates to me like you are either:
Redirecting HTTP to HTTPS at your origin host/server
Not having an valid and installed SSL certificate for this sub-domain
Here is a way to re-check if you correctly setup the SSL for your domain with Cloudflare:
In case you do not have an SSL certificate, you can use Cloudflare SSL, if so, kindly make sure you follow the instructions as follows on the below article to setup an SSL certificate using Cloudflare Origin CA Certificate: