vpn.sh

#!/usr/bin/env osascript -l JavaScript

function run(argv) {
  var method;
  if (['connect', 'disconnect'].indexOf(argv[0]) > -1) {
    method = argv[0]
  } else {
    return console.log('Error: invalid method');
  }

  try {
    var systemEvents = Application('System Events');

    systemEvents[method](systemEvents.networkPreferences.services.whose({ name: 'My VPN' });
  }
  catch (error) {
    if (error.errorNumber !== -1708) console.log(error);
  }
}