tfo-proxy

This application listens on a TCP port supporting TCP fast open and proxies streams to another application listening on another TCP port to allow for non-TCP-fast-open-aware server applications to support TCP fast open.

This proxy should be run on the same machine as the server that you would like to make TCP fast open enabled so that the RTT between the proxy and the server is near zero.

The following image shows how the connections are handled:

The left hand line is the client, the middle line is the proxy and the right hand line is the server.