Restangular send 403 forbidden error or XMLHttpRequest error from dirrenet host

Question

I wrote this light comet implementation

    var app = angular.module('App', ['restangular', 'Comet']);

app.config(function(RestangularProvider) {
    //RestangularProvider.setBaseUrl('http://localhost/my-rest-api/api/v1/');
    RestangularProvider.setBaseUrl('http://[private-ip]/my-rest-api/api/v1/');
    RestangularProvider.setDefaultHttpFields({timeout: 60*60*24});
});

var comet = angular.module('Comet', []);

comet.factory('CometService', ['Restangular', function(Restangular){
    var cometUrl = Restangular.all('comet');

    var asteroid = function(cometUrl, callback){
        cometUrl.post({user:"Username"}).then(function(data){
            callback(data.plain());
            asteroid(cometUrl,callback);
        })
    };

    return {
        getComet: function(callback){
            asteroid(cometUrl,callback);
        }
    }

}]);

app.controller('Ctrl', ['$scope', 'CometService', function($scope, CometService){
    function callback(data){
        console.log(data);
    }
    CometService.getComet(callback);
}]);

It works very well in localhost, but not if the API is called from another host. The same code works fine if I don't use restangular. The API is written in PHP using the Phalcon platform, so all CORS headers are installed. All directories have permission 777. Error 403 was added if I use http: // [private-ip] / my-rest-api / api / v1 / comet url directly in Restangular.all (url) and XMLHttpRequest (OPTION Angular. js 9827) was added with this code.