Configure the NAT gateway in manual allocation mode, allocate 2 NAT IP addresses, and update the minimum number of ports per VM to 256.

Create a second Cloud NAT gateway with the default minimum number of ports configured per VM to 64.

Use the default Cloud NAT gateway's NAT proxy to dynamically scale using a single NAT IP address.

Use the default Cloud NAT gateway to automatically scale to the required number of NAT IP addresses, and update the minimum number of ports per VM to 128.

Configure the NAT gateway in manual allocation mode, allocate 4 NAT IP addresses, and update the minimum number of ports per VM to 128.