First need to ask, how do you plan to use the 5 IP addresses? 1 IP is guaranteed to be used on the AX11000. What about the other 4?

Actually what we need is to configure NAT. For example if you have a PC with a local IP address, and you need this PC to be accessed from the Internet, you create a static NAT rule for it. The idea is that if yoi access the public IP address, you will be sent to the local PC. No need to configure the public IP directly on the PC.

I'm a network engineer by profession, I use NAT all the time. In the first place, NAT is how you are able to browse the Internet. Otherwise you literally cannot reach to other public websites or hosts. The Internet is made possible because of NAT.

What we are looking at here is how to apply a public IP to a local host, also by using NAT. You can use static NAT or port address translation to achieve this. Yes, it's not secure by itself. That's why we usually have firewall and IPS to secure your network.

Having said that, we still need to know what TS wants to achieve in the first place