Proxmox Firewall for NAT

Hello
it is possible to use the Proxmox Firewall as NAT?

I would imagine to use the (1) WAN IP Port and translate it to (x) Private IP Address on different Container and KVM.
If my provider would change my Router IP - I would have a down time - but this is no Problem. I think as soon I have changed Internic Nameserver IP to the new Router IP and changed the Firewall Rule it should be working again, after a delay.

I hope my thoughts would work.

have a nice day
vinc