diff --git a/app/src/Web/Controller/Admin/AdminController.php b/app/src/Web/Controller/Admin/AdminController.php
index 39df4e0f..59fa37b4 100644
--- a/app/src/Web/Controller/Admin/AdminController.php
+++ b/app/src/Web/Controller/Admin/AdminController.php
@@ -6,6 +6,7 @@
 use Fc2blog\App;
 use Fc2blog\Model\BlogsModel;
 use Fc2blog\Model\UsersModel;
+use Fc2blog\Service\AccessBlock;
 use Fc2blog\Service\BlogService;
 use Fc2blog\Web\Controller\Controller;
 use Fc2blog\Web\Request;
@@ -13,10 +14,13 @@
 
 abstract class AdminController extends Controller
 {
-    protected function beforeFilter(Request $request)
+    protected function beforeFilter(Request $request): string
     {
         // 親のフィルター呼び出し
-        parent::beforeFilter($request);
+        $template_path = parent::beforeFilter($request);
+        if (strlen($template_path) > 0) {
+            return $template_path;
+        }
 
         // install.lockファイルがなければインストーラーへ
         if (!$this->isInstalled() && (
@@ -26,6 +30,11 @@ protected function beforeFilter(Request $request)
             $this->redirect($request, ['controller' => 'Common', 'action' => 'install']);
         }
 
+        // IPアドレスからアクセス元の国を推定してのブロック
+        if ((new AccessBlock())->isAdminBlockIp($request)) {
+            return $this->error403();
+        }
+
         if (!$this->isLogin()) {
             // 未ログイン時でもアクセス許可するパターンリスト
             $allows = array(
@@ -40,7 +49,7 @@ protected function beforeFilter(Request $request)
             if (!isset($allows[$controller_name]) || !in_array($action_name, $allows[$controller_name])) {
                 $this->redirect($request, array('controller' => 'Session', 'action' => 'login'));
             }
-            return;
+            return "";
         }
 
         if (!$this->isSelectedBlog()) {
@@ -57,7 +66,7 @@ protected function beforeFilter(Request $request)
                 $this->setWarnMessage(__('Please select a blog'));
                 $this->redirect($request, ['controller' => 'Blogs', 'action' => 'index']);
             }
-            return;
+            return "";
         }
 
         // ログイン中でかつブログ選択中の場合ブログ情報を取得し時間設定を行う
@@ -65,6 +74,8 @@ protected function beforeFilter(Request $request)
         if (is_array($blog) && isset($blog['timezone'])) {
             date_default_timezone_set($blog['timezone']);
         }
+
+        return "";
     }
 
     /**
diff --git a/app/src/Web/Controller/Controller.php b/app/src/Web/Controller/Controller.php
index d027e086..96d6bde5 100644
--- a/app/src/Web/Controller/Controller.php
+++ b/app/src/Web/Controller/Controller.php
@@ -53,7 +53,10 @@ public function execute($method): void
      */
     public function prepare(string $method): string
     {
-        $this->beforeFilter($this->request);
+        $template_path = $this->beforeFilter($this->request);
+        if (strlen($template_path) > 0) {
+            return $template_path;
+        }
 
         $this->resolvedMethod = $method;
 
@@ -130,8 +133,9 @@ protected function isInvalidAjaxRequest(Request $request): bool
         return false;
     }
 
-    protected function beforeFilter(Request $request)
+    protected function beforeFilter(Request $request): string
     {
+        return "";
     }
 
     public function set(string $key, $value)
diff --git a/app/src/Web/Controller/User/EntriesController.php b/app/src/Web/Controller/User/EntriesController.php
index fba7fb1d..699a00c9 100644
--- a/app/src/Web/Controller/User/EntriesController.php
+++ b/app/src/Web/Controller/User/EntriesController.php
@@ -27,10 +27,14 @@ class EntriesController extends UserController
     /**
      * 記事系統の前処理
      * @param Request $request
+     * @return string
      */
-    protected function beforeFilter(Request $request): void
+    protected function beforeFilter(Request $request): string
     {
-        parent::beforeFilter($request);
+        $template_path = parent::beforeFilter($request);
+        if (strlen($template_path) > 0) {
+            return $template_path;
+        }
 
         // ブログID指定があるかチェック
         $blog_id = $request->getBlogId();
@@ -76,6 +80,8 @@ protected function beforeFilter(Request $request): void
         $entries_model = new EntriesModel();
         $entries_model->updateReservation($blog_id);
         $entries_model->updateLimited($blog_id);
+
+        return "";
     }
 
     /**
diff --git a/app/src/Web/Controller/User/UserController.php b/app/src/Web/Controller/User/UserController.php
index 3c9c3968..b766ec72 100644
--- a/app/src/Web/Controller/User/UserController.php
+++ b/app/src/Web/Controller/User/UserController.php
@@ -4,6 +4,7 @@
 namespace Fc2blog\Web\Controller\User;
 
 use Fc2blog\Model\BlogsModel;
+use Fc2blog\Service\AccessBlock;
 use Fc2blog\Web\Controller\Controller;
 use Fc2blog\Web\Fc2BlogTemplate;
 use Fc2blog\Web\Request;
@@ -12,6 +13,22 @@
 
 abstract class UserController extends Controller
 {
+    protected function beforeFilter(Request $request): string
+    {
+        // 親のフィルター呼び出し
+        $template_path = parent::beforeFilter($request);
+        if (strlen($template_path) > 0) {
+            return $template_path;
+        }
+
+        // IPアドレスからアクセス元の国を推定してのブロック
+        if ((new AccessBlock())->isUserBlockIp($request)) {
+            return $this->error403();
+        }
+
+        return "";
+    }
+
     /**
      * 管理画面ログイン中のブログIDを取得する
      */