my %login_param = (
    user     => 'USER',
    port     => '6789',
    timeout  => 60,
    more     => [
      -i => $rsa_file,
      -o => 'StrictHostKeyChecking no',
      -o => 'ProxyCommand='/usr/bin/connect -5 -w -S \
             XXX.XXX.XXX.XXX:8080 %h %', 
    ],
  );