Snippet that requires most Meteor views to render a login form if !currentUser.

router.js

Router.configure({
  layoutTemplate: "layout",
  notFoundTemplate: "notFound",
  loadingTemplate: "loading"
});

if(Meteor.isClient) {
  var publicRoutes = ["userRequest", "userPassForgot", "userPassReset"];
}

Router.onBeforeAction(function () {
  if (!Meteor.userId()) {
    this.render('userLogin');
  } 
},{except: publicRoutes});


Router.route('/',  { name: 'home', controller: 'HomeController'});

Router.route('/user-request',  { name: 'userRequest', controller: 'UserRequestController'});
Router.route('/password-forgot',  { name: 'userPassForgot', controller: 'UserPassForgotController'});
Router.route('/password-reset',   { name: 'userPassReset',  controller: 'UserPassResetController'});