Custom Domains setup success, but the cloudflare cannot access the origin server

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I setup the custom domain successfully, the cname record was added successfully, with the proxy closed. But when I use my custom domain to access the app, cloudflare reports that the SSL handshake with the origin server fails (525) as this snapshot shows:
image.png

Troubleshooting information from cloudflare: https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-5xx-errors/error-525/
I think the issue lies in the proxy in claw cloud run. After my custom doamin config was applied, the origin server becomes inaccessible because of the failure in the connection: image.png

Is there anyone who has any insights? Please advise!

3 Answers

I'm the same, have you solved it yet?

Where did you buy your domain name?
It's possible that there is a problem with your domain hosted on CloudFlare. I've never had this happen to me.
dns1.png
end1.png

This happened to me as well. Here's what worked in my case:

  • Make sure the CNAME record is set to "DNS Only" (grey cloud) in Cloudflare, not proxied (orange cloud).

  • Wait a few hours — for me, it took around 4 hours before the DNS change fully propagated and the SSL handshake started working.

  • During this waiting period, try accessing the app from a different network or browser. Sometimes cached SSL info can cause the same issue to appear even after things are fixed.

Once the DNS settled and everything started working smoothly.