Abstract: The disclosure provides an approach for gateway optimization. Embodiments include receiving, at a first gateway associated with a first tenant within a data center, a packet directed to a first public network address of an endpoint associated with a second tenant within the data center. Embodiments include performing, by the first gateway, network address translation (NAT) to translate the first public network address to a private network address of the endpoint. Embodiments include forwarding, by the first gateway, the packet to an edge gateway of the data center. Embodiments include forwarding, by the edge gateway, the packet to a second gateway associated with the second tenant within the data center without sending the packet to a public interface of the edge gateway. Embodiments include forwarding, by the second gateway, the packet to the endpoint.

Abstract: A method for direct communication between a source endpoint executing in a first datacenter and a destination endpoint executing in a second datacenter. The method receives, at a gateway of the second datacenter, a packet sent by the source endpoint, the packet having a header that includes a source IP address corresponding to a public IP address of the first datacenter, a destination IP address corresponding to a public IP address of the second datacenter, and source and destination port numbers. The method performs a DNAT process on the packet to replace at least the destination IP address in the header with a private IP address of the destination endpoint. The DNAT process identifies the private IP address by mapping the source and destination port numbers to the private IP address of the destination endpoint. The method then transmits the packet to the destination endpoint in the second datacenter.

Abstract: A method for direct communication between a source endpoint executing in a first datacenter and a destination endpoint executing in a second datacenter. The method receives, at a gateway of the second datacenter, a packet sent by the source endpoint, the packet having a header that includes a source IP address corresponding to a public IP address of the first datacenter, a destination IP address corresponding to a public IP address of the second datacenter, and source and destination port numbers. The method performs a DNAT process on the packet to replace at least the destination IP address in the header with a private IP address of the destination endpoint. The DNAT process identifies the private IP address by mapping the source and destination port numbers to the private IP address of the destination endpoint. The method then transmits the packet to the destination endpoint in the second datacenter.