Has anyone ever tried using socket.io through a cloudflare tunnel on Ubuntu server in Oracle Cloud?

Everything works great locally. Everything works great on my home windows machine through a cloudflare tunnel

It's likely a security policy/firewall/routing issue.

You'll have to post your VCNs topology for anyone to have any chance of troubleshooting with you.

@TheBeardedOne I'd recommend skipping socket.io and going straight for a websocket. It's technology from yesteryear that isn't necessary any more. Last I checked, it does long polling by default before upgrading, and everything supports websockets (can you even do binary sockets with socket.io?)