@jkarneges The header is being passed now thanks! Now, however, once I've established the websocket-over- http connection and subscribed the connection to a channel, I'm only able to send a further message from the client (wscat). I can publish a response to it and it's received by wscat, but attempts to send any further messages over the connection fail without even hitting pushpin. I've tried with other clients and get the same outcome. Is this behaviour expected?