On 01/21/2015 09:38 AM, Les Mikesell wrote: > If you can change the client, and you want to keep essentially > re-using the same socket after a reboot Not the same socket, but the same client port number. > , can't you simply send a RST > on it when starting up I don't think so. That would also be a packet injection attack, and I'm mostly certain the application would need to use a sequence number that matched up with the open socket.