Issue with Image Downloads in Kasm Workspaces using Cloudflare Tunnel

[idrone3d]

📌 Issue Description:
We have deployed Kasm Workspaces on an internal server (192.168.1.153), accessible externally only via Cloudflare Tunnel (HTTPS on port 8443). The system functions correctly, but image downloads fail.

🔍 Possible Causes:

Blocked Ports: Kasm may require additional ports (5000, 443, 3389, 5900), but Cloudflare only allows HTTPS traffic on 8443.
Lack of External Connectivity: Kasm might need access to external servers to download images.
Additional Protocols: HTTP/2 is enabled, but we are unsure if Kasm requires WebSockets or other specific protocols.
❓ Questions:
📌 What additional ports and services are required for image downloads to work properly?
📌 Does Kasm need access to external servers to manage images?
📌 Are there any recommended settings for integrating Kasm with Cloudflare Tunnel?

We appreciate your support and look forward to your response.

Best regards,