[SOLVED] Proxmox install without a router

I don't really understand your picture, but I have run Proxmox with only virtual network bridges and just a single physical cable between a modem (1xIPv4) and a pfSense VM (with PCI passthrough of a single port network card).
 
I don't really understand your picture, but I have run Proxmox with only virtual network bridges and just a single physical cable between a modem (1xIPv4) and a pfSense VM (with PCI passthrough of a single port network card).
Thank you @avw .
Sorry, I had to move this thread to the networking and firewall topic but couldn't delete this thread.

Could you please tell me how you configured this in proxmox but put the explanation in the new thread here :
https://forum.proxmox.com/threads/proxmox-isp-modem-without-a-router.105338/

Thanks again.
Gav