Hello again. I SOLVED the problem with these steps:
I read this https://pve.proxmox.com/wiki/Proxmox_VE_inside_VirtualBox
So I opened Virtual Box, and then I opened Promox Network Configuration (on Virtual Box):
As you can see, I changed it to NAT.
Then I continued reading...
Hello. I just installed Proxmox 7.0 as a Virtual Machine on Virtual Box (Test purposes).
It works fine. From Proxmox shell I can reach Internet:
I have this configuration on Network:
I have all firewalls disabled.
This is my Proxmox network configuration:
This is my VMWindows 7 Network...