diff --git a/src/app/Http/Controllers/API/V4/Admin/UsersController.php b/src/app/Http/Controllers/API/V4/Admin/UsersController.php
--- a/src/app/Http/Controllers/API/V4/Admin/UsersController.php
+++ b/src/app/Http/Controllers/API/V4/Admin/UsersController.php
@@ -421,4 +421,18 @@
                 'message' => self::trans('app.user-update-success'),
         ]);
     }
+
+    /**
+     * Get the ip that kolab4 sees from the request.
+     *
+     * Useful for testing proxy settings and making sure the X-Forwarded-For Header is picked up.
+     *
+     * @return \Illuminate\Http\JsonResponse The response
+     */
+    public function whatsmyip(Request $request)
+    {
+        return response()->json([
+            'ip' => $request->ip()
+        ]);
+    }
 }
diff --git a/src/routes/api.php b/src/routes/api.php
--- a/src/routes/api.php
+++ b/src/routes/api.php
@@ -261,6 +261,7 @@
             Route::get('wallets/{id}/transactions', [API\V4\Admin\WalletsController::class, 'transactions']);
 
             Route::get('stats/chart/{chart}', [API\V4\Admin\StatsController::class, 'chart']);
+            Route::get('whatsmyip', [API\V4\Admin\UsersController::class, 'whatsmyip']);
         }
     );
 }