$ssh_user
User name to use for outbound SSH connections.
$ssh_host
Host name to use for outbound SSH connections.
$ssh_port
Port to use for outbound SSH connections.
$ssh_identity
Identity to use for outbound SSH connections.
$ssh_logfile
If set, specifies filename for the SSH client log.
$ssh_background
If true, runs the SSH process in the background.
$ssh_no_stdin
If true, disconnects stdin from the SSH process.
$ssh_no_login
If true, disables running a command on the remote host.
$ssh_force_pty
If true, forces allocation of a pseudo-terminal.
$ssh_remote_portmap[]
List of port mappings for creating SSH tunnels