diff --git a/app/Http/Controllers/AuthController.php b/app/Http/Controllers/AuthController.php
index a2466b7a..b0bf09ee 100644
--- a/app/Http/Controllers/AuthController.php
+++ b/app/Http/Controllers/AuthController.php
@@ -117,17 +117,16 @@ class AuthController extends Controller
 
         // If amount of registered accounts of IP is more than allowed amounts,
         // then reject the register.
-        if (User::where('ip', $request->ip())->count() < option('regs_per_ip'))
+        if (User::where('ip', Utils::getClientIp())->count() < option('regs_per_ip'))
         {
             // Register a new user.
             // If the email is already registered,
             // it will return a false value.
             $user = User::register(
                 $request->input('email'),
-                $request->input('password'),
-            function($user) use ($request)
+                $request->input('password'), function($user) use ($request)
             {
-                $user->ip           = $request->ip();
+                $user->ip           = Utils::getClientIp();
                 $user->score        = option('user_initial_score');
                 $user->register_at  = Utils::getTimeFormatted();
                 $user->last_sign_at = Utils::getTimeFormatted(time() - 86400);
diff --git a/app/Http/Controllers/SetupController.php b/app/Http/Controllers/SetupController.php
index db400304..50ca9405 100644
--- a/app/Http/Controllers/SetupController.php
+++ b/app/Http/Controllers/SetupController.php
@@ -111,10 +111,9 @@ class SetupController extends Controller
         // register super admin
         $user = User::register(
             $request->input('email'),
-            $request->input('password'),
-            function ($user) use ($request)
+            $request->input('password'), function ($user)
         {
-            $user->ip           = $request->ip();
+            $user->ip           = Utils::getClientIp();
             $user->score        = option('user_initial_score');
             $user->register_at  = Utils::getTimeFormatted();
             $user->last_sign_at = Utils::getTimeFormatted(time() - 86400);
diff --git a/app/Services/Utils.php b/app/Services/Utils.php
index 7034c0fe..b567dfe7 100644
--- a/app/Services/Utils.php
+++ b/app/Services/Utils.php
@@ -8,6 +8,24 @@ use App\Exceptions\PrettyPageException;
 
 class Utils
 {
+    /**
+     * Returns the client IP address.
+     *
+     * @return string
+     */
+    public static function getClientIp()
+    {
+        if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
+            $ip = $_SERVER['HTTP_CLIENT_IP'];
+        } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
+            $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
+        } else {
+            $ip = $_SERVER['REMOTE_ADDR'];
+        }
+
+        return $ip;
+    }
+
     /**
      * Rename uploaded file
      *