Generic local tunnel to web url

utils.rake

  desc "Start Reverse SSH Tunnel"
  task :start do

    ssh_username = "rails"
        ssh_host = "managedmachine.com"
        ssh_port = 22

       tunnel_listener_port = 9999
         local_listner_port = 8000

    exec "ssh -p #{ssh_port} -nNT -g -R *:#{tunnel_listener_port}:0.0.0.0:#{local_listner_port} #{ssh_username}@#{ssh_host}"
  end