I had a website on GCP
And use ip with port could connect correct.
So I buy a domain on freenom, with domain the website still could connect.
But I want to use cloudflare DNS service and use this tutorial to set the nameservers
The test on cloudflare always give me 503
Use domain to connect will turn to this page
But if I set the nameservers on freenom as default, it will be normal as well.
Did I miss something?