Souke/frontend/controllers/EtablissementController.php

<?php

namespace frontend\controllers;

use Yii;
use yii\filters\AccessControl;
use frontend\controllers\FrontendController;

class EtablissementController extends FrontendController {

    public function behaviors() {
        return [
            'access' => [
                'class' => AccessControl::className(),
                'rules' => [
                    [
                        'allow' => true,
                        'roles' => ['@'],
                    ]
                ],
            ],
        ];
    }
    
    public function actionIndex() {
        
        return $this->render('index') ;
    }
    
}