diff --git a/hwe/func.php b/hwe/func.php
index e7ea5903..c5a2f6e0 100644
--- a/hwe/func.php
+++ b/hwe/func.php
@@ -1047,7 +1047,7 @@ function increaseRefresh($type = "", $cnt = 1)
 
     $logDB = FileDB::db($logPath, $serverPath . '/../f_install/sql/api_log.sql');
 
-    $ip = $_SERVER['REMOTE_ADDR'] ?? 'local';
+    $ip = $_SERVER['HTTP_X_FORWARDED_FOR'] ?? $_SERVER['REMOTE_ADDR'] ?? 'local';
     $date = date('Y-m-d H:i:s');
 
     $logDB->insert('api_log', [
diff --git a/src/sammo/APIHelper.php b/src/sammo/APIHelper.php
index 7268d744..1bb51a0d 100644
--- a/src/sammo/APIHelper.php
+++ b/src/sammo/APIHelper.php
@@ -73,7 +73,7 @@ class APIHelper
             $logPath = "{$rootPath}/d_log/{$realYearMonth}_api_log.db";
         }
         $logDB = FileDB::db($logPath, __DIR__ . '/../../f_install/sql/api_log.sql');
-        $ip = $_SERVER['REMOTE_ADDR'] ?? 'local';
+        $ip = $_SERVER['HTTP_X_FORWARDED_FOR'] ?? $_SERVER['REMOTE_ADDR'] ?? 'local';
         $date = date('Y-m-d H:i:s');
 
         //NOTE: array_merge([], {})의 상황이 가능함.
diff --git a/src/sammo/Util.php b/src/sammo/Util.php
index dd9227f6..f3e1745e 100644
--- a/src/sammo/Util.php
+++ b/src/sammo/Util.php
@@ -947,31 +947,13 @@ class Util
         return $flattened;
     }
 
-    /**
-     * Returns the IP address of the client.
-     *
-     * @param   boolean $trust_proxy_headers Whether or not to trust the
-     *                                       proxy headers HTTP_CLIENT_IP
-     *                                       and HTTP_X_FORWARDED_FOR. ONLY
-     *                                       use if your server is behind a
-     *                                       proxy that sets these values
-     * @return  string
-     */
     public static function get_client_ip($trust_proxy_headers = false)
     {
         if (!$trust_proxy_headers) {
             return $_SERVER['REMOTE_ADDR'];
         }
 
-        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;
+        return $_SERVER['HTTP_X_FORWARDED_FOR'] ?? $_SERVER['REMOTE_ADDR'] ?? 'local';
     }
 
     /**