thr threading thread(target=handlerargs=(chanremote_hostremote_port)thr setdaemon(truethr start(in paramikothere are two main communication methodstransportwhich is responsible for making and maintaining the encrypted connectionand channelwhich acts like sock for sending and receiving data over the encrypted transport session here we start to use paramiko' request_port_forward to forward tcp connections from port on the ssh server and start up new transport channel thenover the channelwe call the function handler but we're not done yet def handler(chanhostport)sock socket socket(trysock connect((hostport)except exception as everbose('forwarding request to % :% failed% (hostporte)return verbose('connectedtunnel open % -% -% (chan origin_addrchan getpeername()(hostport))while truerwx select select([sockchan][][]if sock in rdata sock recv( if len(data= break chan send(dataif chan in rdata chan recv( if len(data= break sock send(datachan close(sock close(verbose('tunnel closed from % (chan origin_addr,)and finallythe data is sent and received let' give it try