A network system includes a datacenter including a gateway router configured to route data transmissions of public network traffic to and from a plurality of VPCs hosted by the datacenter. A first VPC is configured to communicate with the gateway router. The first VPC is accessible and identifiable via a first public IP address. A second VPC is configured to communicate with the gateway router, and the second VPC is accessible and identifiable via a second public IP address. A direct connection transmits a particular data transmission based on the first public IP address and the second public IP address, directly between the first VPC and the second VPC so as to bypass the gateway router. The first public IP address and the second public IP address are assigned from among a group of public IP addresses allocated for assignment to VPCs hosted by the datacenter.