I have a client application on a windows machine, which tunnels through stunnel v4.14 to launch and inetd through stunnel v4.09 on a Linux box.

The Linux side INETD successfully sends a packet of 25B to the client.

The client (windows) receives this packet and returns a 12B packet. The packet IS received by the INETD but then stunnel immediately closes the socket.

Why is it doing this?

I'm including all configs and longs.