VMware, Inc.
DIRECT COMMUNICATION BETWEEN ENDPOINTS ACROSS REMOTE SITES

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.