Cloudflare proxy remote address returns HTTP 500

dns

#1

I have a web application that is hosted on a server. From the browser console, I can see requests being made for resources (javascript, css etc.) on the server. Certain requests return HTTP 500 error when it comes from a specific remote address. Attached image below.

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When the request comes from 104.24.121.51:443, it is successful.

I have also whitelisted the IPs listed here https://www.cloudflare.com/ips/

Any ideas what is causing this issue or how to fix it?


#2

Do those certain requests from the specific remote address always return a 500? And are other requests from the same specific remote address always getting through?

A 500 is something at your provider’s end that’s not letting the request through. Sometimes it’s a firewall upstream from your account.


#3

Yes, they always return 500 error for that specific resource (a javascript file) from that specific remote address. Other requests for different javascript files from the same remote address are successful.


#4

Since it’s reproducible, open a Support Ticket. I’m sure they’d love to figure out this inconsistency. support AT cloudflare DOT com
Or https://support.cloudflare.com/hc/en-us/requests


#5

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