I ran into an issue with trying to use remote port forwarding. I'm using mina sshd as the client and connecting to an OpenSSH server. When I debugged the code it seems that the server was not sending any bytes in the response to the "tcpip-forward" request. I searched and found rfc4254 (which I have no clue if that is current) and it said
If a client passes 0 as port number to bind and has 'want reply' as TRUE, then the server allocates the next available unprivileged port number and replies with the following message; otherwise, there is no response-specific data. Based on that description it seems that mina sshd client is not following the spec. If you put a remote port != 0 then the server won't send any reply contents. I changed DefaultTcpipForwarder.startRemotePortForwarding() from "int port = result.getInt()" to int port = remote.getPort() == 0 ? result.getInt() : remote.getPort(); And now things are working fine. I'm starting a new project and want to heavily rely on this feature. Should I expect this feature to be stable? In fact, is Mina SSHD as a whole considered stable? In general its seems like sshd is a bit light on documentation. That hasn't proven to be any problem though because I've found the code base very easy to read and understand, which is great. Darren
