CodeIgniter Vagrant Redirection Loop - codeigniter

Question

I try to use CodeIgniter with vagrant (machine created with puphpet).
The ip address is 192.168.56.101 and when I try to access the main page I get a loop redirection to /index.php/login
This code is working when trying to access it from inside the VM, but within the host browser I get a loop...
Here is an header from the response :
Refresh:0;url=http://192.168.56.101/index.php/login
And some configuration settings :
// application/config/config.php
$config['base_url'] = 'http://192.168.56.101/';
$config['index_page'] = 'index.php';
Any idea ? I can post more code if it's needed.
Thanks
Edit : as requested, here's more infos :
//index.php
define('ENVIRONMENT', 'development');
if (defined('ENVIRONMENT'))
{
switch (ENVIRONMENT)
{
case 'development':
error_reporting(E_ALL);
break;
case 'testing':
case 'production':
error_reporting(0);
break;
default:
exit('The application environment is not set correctly.');
}
}
$system_path = 'system';
$application_folder = 'application';
if (defined('STDIN'))
{
chdir(dirname(__FILE__));
}
if (realpath($system_path) !== FALSE)
{
$system_path = realpath($system_path).'/';
}
$system_path = rtrim($system_path, '/').'/';
if ( ! is_dir($system_path)){
exit("Your system folder path does not appear to be set correctly. Please open the following file and correct this: ".pathinfo(__FILE__, PATHINFO_BASENAME));
}
define('SELF', pathinfo(__FILE__, PATHINFO_BASENAME));
define('EXT', '.php');
define('BASEPATH', str_replace("\\", "/", $system_path));
define('FCPATH', str_replace(SELF, '', __FILE__));
define('SYSDIR', trim(strrchr(trim(BASEPATH, '/'), '/'), '/'));
if (is_dir($application_folder))
{
define('APPPATH', $application_folder.'/');
}
else
{
if ( ! is_dir(BASEPATH.$application_folder.'/'))
if (is_dir($application_folder))
{
define('APPPATH', $application_folder.'/');
}
else
{
if ( ! is_dir(BASEPATH.$application_folder.'/'))
{
exit("Your application folder path does not appear to be set correctly. Please open the following file and correct this: ".SELF);
}
define('APPPATH', BASEPATH.$application_folder.'/');
}
require_once BASEPATH.'core/CodeIgniter.php';
The main controller :
// application/core/MY_Controller.php
class MY_Controller extends CI_Controller
{
public function __construct()
{
parent::__construct();
if ($this->session->userdata('username') === false)
{
redirect('login', 'refresh');
}
}
}
The login controller :
// application/controller/login.php
class Login extends CI_Controller
{
public function index()
{
$username = $this->session->userdata('username');
if ($username === false) {
$view_data = array();
$view_data['alert'] = $this->session->flashdata('alert');
$this->load->view('login',$view_data);
}
else {
redirect('home', 'refresh');
}
}
public function connect() {
$this->load->model('user_model');
$username = $this->session->userdata('username');
if ($username === false) {
$post_username = $this->input->post('username');
$post_password = $this->input->post('password');
$data_bdd = $this->user_model->get_user($post_username);
$this->session->set_flashdata('alert', 'user unknown');
foreach ($data_bdd as $user) {
$this->session->flashdata('alert');
if ($this->encrypt->decode($user->USER_PASSWORD) == $post_password) {
$this->session->set_userdata('username',$post_username);
}
else{
$this->session->set_flashdata('alert', 'incorrect password');
}
}
}
redirect('login', 'refresh');
}
public function disconnect() {
$this->session->unset_userdata('username');
redirect('login', 'refresh');
}
}

Answer 1

I found a solution by removing the following lines :
// application/core/MY_Controller.php
class MY_Controller extends CI_Controller
{
public function __construct()
{
parent::__construct();
//if ($this->session->userdata('username') === false)
//{
// redirect('login', 'refresh');
//}
}
}
But I have no longer access to any of the website functionalities (because I am not logged in). I still cannot have access to the login page...