Redirect to 2nd Yunohost server behind Nat network

Question: If I install the Yunohost redirect app on my current Yunohost server, will I be able to setup a VM Yunohost server on another computer and use it on the Internet as well? Should I put the new name in redirect “prior” to installing the VM Yunohost? Background: My Yunohost is behind a NAT and can only forward ports 80 and 443 to one server.