Yes, perhaps if you write a small piece of middleware, then paste it at the top of the stack. Try using this: -
if (Meteor.is_server) {
Meteor.startup(function () {
var require = __meteor_bootstrap__.require;
var connect = require('connect');
__meteor_bootstrap__.app.stack.splice(0, 0, {
route: '',
handle: connect.basicAuth(function(user, pass){
return 'guest' == user & 'password' == pass;
})
});
});
}