def main():
    options,server,remote = parse_options()
    password = None
    if options.readpass:
        password = getpass.getpass('Enter SSH password:')
    client = paramiko.SSHClient()
    client.load_system_host_keys()
    client.set_missing_host_key_policy(paramiko.WarningPolicy())
    verbose('Connection to ssh host %s:%d...' % (server[0],server[1]))


    try:
        client.connect(server[0],server[1],username=options.user,key_filename=options,keyfile,look_for_keys=options.look_for_keys,password=password)
    except Exception as e:
        print('*** Failed to connect to %s:%d:%r' % (server[0],server[1],sys.exit(1)))

    verbose('Now forwarding remote port %d to %s:%d...' % (options.port,remote[0],remote[1]))

    try:
        reverse_forward_tunnel(options.port,remote[0],remote[1],client.get_transport)
    except KeyboardInterrupt:
        print('C-c: Port forwarding stopped.')
        sys.exit(0)