Whitelisted IP in India, after 48 hours site still not reachable & 512 error for user

How can I set up for this user to access my website:
See my work here, does this look correct:

Edit Firewall Rule
Rule name
Give your rule a descriptive name
allow
When incoming requests match…
Field
IP Source Address
Operator
equals
Value
103.41.25.244
Expression Preview
Edit expression
(ip.src eq 103.41.25.244)
Then…
Choose an action
Allow

A 512 error doesn’t sound like it comes from Cloudflare. Can you post a screenshot of it?

Oh…that’s a 521, not a 512. It’s quite possible the server is blocking Cloudflare’s local POP. Make sure the host ALLOWS everything from IP Ranges

Thank you and sorry for my error in the number 521!
Best
Ken

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