checkNotNull( port, "Port must be defined" );
Session session = jsch.getSession( username, host, port);
checkStringHostKeyCheck(checkHostKey, session);
session.setPassword( password);
session.connect( this.connectTimeout );
setupPortForwarding(portForwardings, session);
Integer id = connectIds.incrementAndGet();
String name = id + "-" + username + "-" + host + "-" + port;