Infrastracture setup with multiple servers behind one public IP address

Hi all,
I’d like to clarify setup for installation:

I have only one public IP address on router/firewall/nat virtual server.
I’d like to have multiple jvb servers, expecting thousands of conferences. I’m aware that having one meet server and/or one gateway is spof, that’s ok for now.
Clients are outside private network, anywhere on internet.

Question is if each jvb server needs to have own public IP address or to be behind NAT with own public address?
Or can I have all “infrastructure” behind one NAT public IP address?

thank you