more references.

Quickstart/Diagnostics/DiagnosticsController.cs

@@ -0,0 +1,29 @@
+// Copyright (c) Brock Allen & Dominick Baier. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information.
+
+
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace IdentityServerHost.Quickstart.UI
+{
+    [SecurityHeaders]
+    [Authorize]
+    public class DiagnosticsController : Controller
+    {
+        public async Task<IActionResult> Index()
+        {
+            var localAddresses = new string[] { "127.0.0.1", "::1", HttpContext.Connection.LocalIpAddress.ToString() };
+            if (!localAddresses.Contains(HttpContext.Connection.RemoteIpAddress.ToString()))
+            {
+                return NotFound();
+            }
+
+            var model = new DiagnosticsViewModel(await HttpContext.AuthenticateAsync());
+            return View(model);
+        }
+    }
+}