diff --git a/Core/InputValidator.cs b/Core/InputValidator.cs
new file mode 100644
index 0000000..335291b
--- /dev/null
+++ b/Core/InputValidator.cs
@@ -0,0 +1,19 @@
+namespace IP_port_checker.Core
+{
+    class InputValidator
+    {
+        public static int StEnPort(string promt)
+        {
+            while (true)
+            {
+                Console.Write(promt);
+                string? input = Console.ReadLine();
+                if (int.TryParse(input, out int port) && port >= 1 && port <= 65535)
+                    return port;
+                Console.ForegroundColor = ConsoleColor.Red;
+                Console.WriteLine("Ошибка: введите число от 1 до 65535");
+                Console.ResetColor();
+            }
+        }
+    }
+}