no VNC failure with reverse proxy


New Member
Oct 11, 2023

I hope I'm not bothering you, but I need your assistance. I've successfully set up a Proxmox server (8.0.3) on an old PC, and everything went smoothly.
Subsequently, I created a virtual machine with Windows 11.

I can access it internally without any issues, and noVNC starts without a problem.
However, things get complicated when I try to use reverse proxy (Synology NAS) to start VM .

I can access the Proxmox interface via HTTPS without any problems, but I can't seem to open the VM consoles.
It gives me a network error.

I'm not an expert in this field, and it's relatively newbie
Do you know if there's a solution for this issue? I came across a procedure here , but I'm unsure how to apply it or if it's the right solution.

Thank you very much for your assistance.


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    Capture d'écran 2023-10-14 113310.png
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For future reference, the solution in your case is to activate Websocket support in your reverse proxy.
In DSM latest versions :



credits to this blog post (in french)
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