The private subnet for the System interface must have internet access. Internet access ensures that Everpure Cloud Dedicated (PSC Dedicated) can phone home to Pure1 providing logs, alerts, and additional cloud management services. The simplest configuration is to route traffic from the System private subnet to a NAT Gateway, which resides in the public subnet.
NAT Gateway
A NAT Gateway is the simplest way to provide outbound internet traffic for a private subnet. To configure this with PSC Dedicated system interface, you just need to create NAT Gateway on a public subnet and configure a route table associated to the system subnet to it. Below you can see the network and the simplified route tables.
Transit Gateway
By following hub-spoke network design, you can leverage Transit Gateway centralization feature to route outbound internet traffic from a VPC without an internet gateway to a VPC that contains a NAT gateway and an internet gateway. Read more about it here.