Can access IP manually but not via subdomain

Website, Application, Performance DNS & Network
1

So I have two public IPv4 address, provided by my VPS provider. My root domain (say example.com) has to be served from one IP addresses (added as an A record to @) which works flawlessly. However, I have a subdomain (say api.example.com) which has an A record that points to my second IP address.

The catch: I can view the page by manually typing in the IP, but not by the subdomain name (i.e api.example.com). Can anyone point me in the right direction?

2

What happens when you visit the subdomain? Any screenshot?

Also provide screenshots from F12 Developer Tools - Network tab and Console tab.

3

I get Cloudflare’s error 521 page

4

Any error logs from your server? Apache or Nginx?

5

Turns out it was a problem with the SSL certificate. It’s up now! Thanks!

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6

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