diff --git a/FastTunnel.Client/appsettings.json b/FastTunnel.Client/appsettings.json
index 060f502..c77271d 100644
--- a/FastTunnel.Client/appsettings.json
+++ b/FastTunnel.Client/appsettings.json
@@ -20,7 +20,7 @@
         "LocalIp": "127.0.0.1",
 
         // 站点监听的端口号
-        "LocalPort": 80,
+        "LocalPort": 880,
 
         // 子域名, 访问本站点时的url为 http://{SubDomain}.{Domain}:{ProxyPort_HTTP}/
         "SubDomain": "test" // test.test.cc
diff --git a/FastTunnel.Core/Connecter.cs b/FastTunnel.Core/Connecter.cs
index 2e0ef99..a038541 100644
--- a/FastTunnel.Core/Connecter.cs
+++ b/FastTunnel.Core/Connecter.cs
@@ -15,13 +15,21 @@ namespace FastTunnel.Core
 
         public Socket Socket { get; set; }
 
-        public Connecter(string v1, int v2)
+        public Connecter(string v1, int v2, int? sendTimeout = null)
         {
             this._ip = v1;
             this._port = v2;
 
             Socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
-            Socket.SendTimeout = 2000;
+
+            if (sendTimeout.HasValue)
+            {
+                Socket.SendTimeout = sendTimeout.Value;
+            }
+            else
+            {
+                Socket.SendTimeout = 2000;
+            }
         }
 
         public void Connect()
@@ -32,10 +40,20 @@ namespace FastTunnel.Core
             Socket.Connect(point);
         }
 
+        public void Send(byte[] data)
+        {
+            Socket.Send(data);
+        }
+
         public void Send<T>(Message<T> msg)
             where T : TunnelMassage
         {
             Socket.Send(msg);
         }
+
+        public void Close()
+        {
+            Socket.Close();
+        }
     }
 }
diff --git a/FastTunnel.Core/Core/SuiDaoClient.cs b/FastTunnel.Core/Core/SuiDaoClient.cs
index 373493e..1a1272b 100644
--- a/FastTunnel.Core/Core/SuiDaoClient.cs
+++ b/FastTunnel.Core/Core/SuiDaoClient.cs
@@ -67,14 +67,11 @@ namespace FastTunnel.Core.Core
 
             try
             {
-                if (lastHeart == null)
-                    return;
-
                 var timer = sender as System.Timers.Timer;
                 var span = (DateTime.Now - lastHeart).TotalMilliseconds;
                 if (span > timer.Interval)
                 {
-                    _logger.LogDebug($"上次心跳时间为{span}ms前");
+                    _logger.LogDebug($"last heart recived {span / 1000}s ago");
 
                     // 重新登录
                     reConnect();
@@ -175,6 +172,8 @@ namespace FastTunnel.Core.Core
         {
             _logger.LogDebug("通信已建立");
 
+            lastHeart = DateTime.Now;
+
             // 心跳开始
             timer_heart.Start();
             timer_timeout.Start();
@@ -189,7 +188,7 @@ namespace FastTunnel.Core.Core
             byte[] buffer = new byte[1024];
 
             string lastBuffer = string.Empty;
-            int n;
+            int n = 0;
 
             while (true)
             {
@@ -202,8 +201,24 @@ namespace FastTunnel.Core.Core
                         break;
                     }
                 }
-                catch
+                /// <see cref="https://docs.microsoft.com/zh-cn/windows/win32/winsock/windows-sockets-error-codes-2"/>
+                catch (SocketException socketEx)
                 {
+                    // Connection timed out.
+                    if (socketEx.ErrorCode == 10060)
+                    {
+                        _logger.LogInformation("Connection timed out");
+                    }
+                    else
+                    {
+                        _logger.LogError(socketEx);
+                    }
+
+                    break;
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogError(ex);
                     break;
                 }
 
@@ -239,6 +254,8 @@ namespace FastTunnel.Core.Core
                     continue;
                 }
             }
+
+            _logger.LogInformation("stop receive from server");
         }
 
         private IClientHandler HandleServerRequest(string words)
diff --git a/FastTunnel.Core/Core/SuiDaoServer.cs b/FastTunnel.Core/Core/SuiDaoServer.cs
index 11ac0af..769c579 100644
--- a/FastTunnel.Core/Core/SuiDaoServer.cs
+++ b/FastTunnel.Core/Core/SuiDaoServer.cs
@@ -114,10 +114,9 @@ namespace FastTunnel.Core.Core
                     Host = collection[0].Value;
                 }
 
+                _logger.LogDebug(Host);
                 var domain = Host.Split(":")[1].Trim();
 
-                _logger.LogDebug($"Host: {domain}");
-
                 WebInfo web;
                 if (!WebList.TryGetValue(domain, out web))
                 {
@@ -148,7 +147,7 @@ namespace FastTunnel.Core.Core
             }
             catch (Exception ex)
             {
-                _logger.LogError(ex);
+                _logger.LogError("处理Http失败：" + ex);
                 client.Close();
             }
         }
@@ -158,13 +157,12 @@ namespace FastTunnel.Core.Core
             _logger.LogDebug($"TunnelNotFound:'{domain}'");
             string statusLine = "HTTP/1.1 200 OK\r\n";
             string responseHeader = "Content-Type: text/html\r\n";
-            byte[] responseBody;
 
-            var file = Path.Combine(AppContext.BaseDirectory, "Htmls", "TunnelNotFound.html");
-            if (File.Exists(file))
-                responseBody = FileHelper.GetBytesFromFile(file);
-            else
-                responseBody = Encoding.UTF8.GetBytes(TunnelResource.NoTunnelPage);
+            //var file = Path.Combine(AppContext.BaseDirectory, "Htmls", "TunnelNotFound.html");
+            //if (File.Exists(file))
+            //    responseBody = FileHelper.GetBytesFromFile(file);
+
+            byte[] responseBody = Encoding.UTF8.GetBytes(TunnelResource.NoTunnelPage);
 
             clientsocket.Send(Encoding.UTF8.GetBytes(statusLine));
             clientsocket.Send(Encoding.UTF8.GetBytes(responseHeader));
@@ -223,7 +221,7 @@ namespace FastTunnel.Core.Core
             catch (Exception ex)
             {
                 _logger.LogError(ex);
-                _logger.LogError($"错误的消息内容：{words}");
+                _logger.LogError($"handle fail msg：{words}");
 
                 // throw;
                 client.Send(new Message<LogMassage>() { MessageType = MessageType.Log, Content = new LogMassage(LogMsgType.Error, ex.Message) });
@@ -260,6 +258,7 @@ namespace FastTunnel.Core.Core
                     handler = _loginHandler;
                     break;
                 case MessageType.Heart:   // 心跳
+                    Console.WriteLine("收到心跳");
                     handler = _heartHandler;
                     break;
                 case MessageType.C_SwapMsg: // 交换数据
diff --git a/FastTunnel.Core/Handlers/Client/NewCustomerHandler.cs b/FastTunnel.Core/Handlers/Client/NewCustomerHandler.cs
index 93e4667..cec8d18 100644
--- a/FastTunnel.Core/Handlers/Client/NewCustomerHandler.cs
+++ b/FastTunnel.Core/Handlers/Client/NewCustomerHandler.cs
@@ -4,7 +4,11 @@ using FastTunnel.Core.Models;
 using Newtonsoft.Json.Linq;
 using System;
 using System.Collections.Generic;
+using System.IO;
+using System.Net.Sockets;
 using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace FastTunnel.Core.Handlers.Client
 {
@@ -18,7 +22,41 @@ namespace FastTunnel.Core.Handlers.Client
             connecter.Send(new Message<SwapMassage> { MessageType = MessageType.C_SwapMsg, Content = new SwapMassage(request.MsgId) });
 
             var localConnecter = new Connecter(request.WebConfig.LocalIp, request.WebConfig.LocalPort);
-            localConnecter.Connect();
+
+            try
+            {
+                localConnecter.Connect();
+            }
+            catch (SocketException sex)
+            {
+                localConnecter.Close();
+                if (sex.ErrorCode == 10061)
+                {
+                    // 内网的站点不存在或无法访问
+                    string statusLine = "HTTP/1.1 200 OK\r\n";
+                    string responseHeader = "Content-Type: text/html\r\n";
+                    byte[] responseBody;
+                    responseBody = Encoding.UTF8.GetBytes(TunnelResource.NoSite);
+
+                    connecter.Send(Encoding.UTF8.GetBytes(statusLine));
+                    connecter.Send(Encoding.UTF8.GetBytes(responseHeader));
+                    connecter.Send(Encoding.UTF8.GetBytes("\r\n"));
+                    connecter.Send(responseBody);
+
+                    connecter.Socket.Disconnect(false);
+                    connecter.Socket.Close();
+                    return;
+                }
+                else
+                {
+                    throw;
+                }
+            }
+            catch (Exception ex)
+            {
+                localConnecter.Close();
+                throw;
+            }
 
             new SocketSwap(connecter.Socket, localConnecter.Socket).StartSwap();
         }
diff --git a/FastTunnel.Core/Htmls/NoSite.html b/FastTunnel.Core/Htmls/NoSite.html
new file mode 100644
index 0000000..0858acd
--- /dev/null
+++ b/FastTunnel.Core/Htmls/NoSite.html
@@ -0,0 +1,110 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>FastTunnel</title>
+  <link href="https://cdn.bootcss.com/twitter-bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet">
+  <style>
+    .err-info {
+      margin-top: 120px;
+    }
+
+    /* Provide sufficient contrast against white background */
+    a {
+      color: #0366d6;
+    }
+
+    .btn-primary {
+      color: #fff;
+      background-color: #1b6ec2;
+      border-color: #1861ac;
+    }
+
+    .nav-pills .nav-link.active,
+    .nav-pills .show>.nav-link {
+      color: #fff;
+      background-color: #1b6ec2;
+      border-color: #1861ac;
+    }
+
+    /* Sticky footer styles
+-------------------------------------------------- */
+    html {
+      font-size: 14px;
+    }
+
+    @media (min-width: 768px) {
+      html {
+        font-size: 16px;
+      }
+    }
+
+    .border-top {
+      border-top: 1px solid #e5e5e5;
+    }
+
+    .border-bottom {
+      border-bottom: 1px solid #e5e5e5;
+    }
+
+    .box-shadow {
+      box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .05);
+    }
+
+    button.accept-policy {
+      font-size: 1rem;
+      line-height: inherit;
+    }
+
+    /* Sticky footer styles
+-------------------------------------------------- */
+    html {
+      position: relative;
+      min-height: 100%;
+    }
+
+    body {
+      /* Margin bottom by footer height */
+      margin-bottom: 60px;
+    }
+
+    .footer {
+      position: absolute;
+      bottom: 0;
+      width: 100%;
+      white-space: nowrap;
+      line-height: 60px;
+      /* Vertically center the text there */
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container err-info">
+    <main role="main" class="pb-3">
+      <div class="text-center">
+        <h1 class="display-4">连接内网的服务失败</h1>
+        <p>了解有关 <a target="_blank" href="https://github.com/SpringHgui/FastTunnel">FastTunel</a>的信息.</p>
+      </div>
+
+      <blockquote style="padding-top: 4em;">
+        <p class="lead">您看到本页面表示连接您的内网服务失败，请检查：</p>
+      </blockquote>
+      <ol>
+        <li class="lead">本地是否部署了您的服务</li>
+        <li class="lead">配置的本地ip以及端口号是否与您搭建的服务对应</li>
+        <li class="lead">如果内网服务不在客户端运行的计算机，请检查您的计算是否与目标计算机位于内网的同一网段</li>
+      </ol>
+    </main>
+  </div>
+
+  <footer class="border-top footer text-muted">
+    <div class="container">
+      <a href="https://github.com/SpringHgui/FastTunnel" target="_blank">© Power By FastTunnel</a>
+    </div>
+  </footer>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/FastTunnel.Core/Htmls/TunnelNotFound.html b/FastTunnel.Core/Htmls/TunnelNotFound.html
index c493cec..fd2ebdc 100644
--- a/FastTunnel.Core/Htmls/TunnelNotFound.html
+++ b/FastTunnel.Core/Htmls/TunnelNotFound.html
@@ -7,13 +7,8 @@
   <title>FastTunnel</title>
   <link href="https://cdn.bootcss.com/twitter-bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet">
   <style>
-    /* Please see documentation at https://docs.microsoft.com/aspnet/core/client-side/bundling-and-minification
-for details on configuring this project to bundle and minify static web assets. */
-
-    a.navbar-brand {
-      white-space: normal;
-      text-align: center;
-      word-break: break-all;
+    .err-info {
+      margin-top: 120px;
     }
 
     /* Provide sufficient contrast against white background */
@@ -87,26 +82,15 @@ for details on configuring this project to bundle and minify static web assets.
 </head>
 
 <body>
-  <header>
-    <nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
-      <div class="container">
-        <a class="navbar-brand" src="https://suidao.io">FastTunnel</a>
-        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target=".navbar-collapse"
-          aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
-          <span class="navbar-toggler-icon"></span>
-        </button>
-      </div>
-    </nav>
-  </header>
-  <div class="container">
+  <div class="container err-info">
     <main role="main" class="pb-3">
       <div class="text-center">
-        <h1 class="display-4">找不到隧道</h1>
+        <h1 class="display-4">隧道未找到</h1>
         <p>了解有关 <a target="_blank" href="https://github.com/SpringHgui/FastTunnel">FastTunel</a>的信息.</p>
       </div>
 
       <blockquote style="padding-top: 4em;">
-        <p class="lead">看到本页面表示当前隧道未登录，如果您是当前隧道地址的拥有者，请检查以下原因：</p>
+        <p class="lead">您看到本页面表示当前隧道尚未登录，如果您是当前隧道地址的拥有者，请检查以下原因：</p>
       </blockquote>
       <ol>
         <li class="lead">是否创建了当前子域名的隧道</li>
diff --git a/FastTunnel.Core/Listener.cs b/FastTunnel.Core/Listener.cs
index e18ff2c..e6f1fcd 100644
--- a/FastTunnel.Core/Listener.cs
+++ b/FastTunnel.Core/Listener.cs
@@ -86,6 +86,9 @@ namespace FastTunnel.Core
             {
                 ls.Shutdown(SocketShutdown.Both);
             }
+            catch (Exception)
+            {
+            }
             finally
             {
                 ls.Close();
diff --git a/FastTunnel.Core/SocketSwap.cs b/FastTunnel.Core/SocketSwap.cs
index 048eb83..9225cea 100644
--- a/FastTunnel.Core/SocketSwap.cs
+++ b/FastTunnel.Core/SocketSwap.cs
@@ -56,16 +56,17 @@ namespace FastTunnel.Core
 
                     if (num == 0)
                     {
-                        if (chanel.Receive.Connected)
+                        chanel.Receive.Close();
+
+                        try
                         {
-                            try
-                            {
-                                chanel.Receive.Shutdown(SocketShutdown.Both);
-                            }
-                            finally
-                            {
-                                chanel.Receive.Close();
-                            }
+                            // Release the socket.//
+                            chanel.Send.Shutdown(SocketShutdown.Both);
+                        }
+                        catch { }
+                        finally
+                        {
+                            chanel.Send.Close();
                         }
                         break;
                     }
@@ -73,38 +74,39 @@ namespace FastTunnel.Core
                     if (!chanel.Send.Connected)
                         break;
 
-                    var str = Encoding.UTF8.GetString(result, 0, num);
+                    // var str = Encoding.UTF8.GetString(result, 0, num);
 
                     chanel.Send.Send(result, num, SocketFlags.None);
                 }
+                catch (SocketException sex)
+                {
+                    //  Interrupted function call. 10004
+                    // An existing connection was forcibly closed by the remote host. 10054
+                    try
+                    {
+                        chanel.Send.Shutdown(SocketShutdown.Both);
+                    }
+                    catch { }
+                    finally
+                    {
+                        chanel.Send.Close();
+                    }
+
+                    try
+                    {
+                        chanel.Receive.Shutdown(SocketShutdown.Both);
+                    }
+                    catch { }
+                    finally
+                    {
+                        chanel.Receive.Close();
+                    }
+                    break;
+                }
                 catch (Exception ex)
                 {
-                    if (chanel.Receive.Connected)
-                    {
-                        try
-                        {
-                            chanel.Receive.Shutdown(SocketShutdown.Both);
-                        }
-                        finally
-                        {
-                            chanel.Receive.Close();
-                        }
-
-                    }
-
-                    if (chanel.Send.Connected)
-                    {
-                        try
-                        {
-                            chanel.Send.Shutdown(SocketShutdown.Both);
-                        }
-                        finally
-                        {
-                            chanel.Send.Close();
-                        }
-                    }
-
-                    break;
+                    Console.Write(ex.ToString());
+                    throw;
                 }
             }
         }
diff --git a/FastTunnel.Core/TunnelResource.Designer.cs b/FastTunnel.Core/TunnelResource.Designer.cs
index d9a01c9..99b2723 100644
--- a/FastTunnel.Core/TunnelResource.Designer.cs
+++ b/FastTunnel.Core/TunnelResource.Designer.cs
@@ -70,10 +70,47 @@ namespace FastTunnel.Core {
         ///  &lt;title&gt;FastTunnel&lt;/title&gt;
         ///  &lt;link href=&quot;https://cdn.bootcss.com/twitter-bootstrap/4.4.1/css/bootstrap.min.css&quot; rel=&quot;stylesheet&quot;&gt;
         ///  &lt;style&gt;
-        ///    /* Please see documentation at https://docs.microsoft.com/aspnet/core/client-side/bundling-and-minification
-        ///for details on configuring this project to bundle and minify static web assets. */
+        ///    .err-info {
+        ///      margin-top: 120px;
+        ///    }
         ///
-        ///    a.navbar-brand { [字符串的其余部分被截断]&quot;; 的本地化字符串。
+        ///    /* Provide sufficient contrast against white background */
+        ///    a {
+        ///      color: #0366d6;
+        ///    }
+        ///
+        ///    .btn-primary {
+        ///      color: #fff;
+        ///      background-color [字符串的其余部分被截断]&quot;; 的本地化字符串。
+        /// </summary>
+        internal static string NoSite {
+            get {
+                return ResourceManager.GetString("NoSite", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   查找类似 &lt;!DOCTYPE html&gt;
+        ///&lt;html lang=&quot;en&quot;&gt;
+        ///
+        ///&lt;head&gt;
+        ///  &lt;meta charset=&quot;utf-8&quot; /&gt;
+        ///  &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1.0&quot; /&gt;
+        ///  &lt;title&gt;FastTunnel&lt;/title&gt;
+        ///  &lt;link href=&quot;https://cdn.bootcss.com/twitter-bootstrap/4.4.1/css/bootstrap.min.css&quot; rel=&quot;stylesheet&quot;&gt;
+        ///  &lt;style&gt;
+        ///    .err-info {
+        ///      margin-top: 120px;
+        ///    }
+        ///
+        ///    /* Provide sufficient contrast against white background */
+        ///    a {
+        ///      color: #0366d6;
+        ///    }
+        ///
+        ///    .btn-primary {
+        ///      color: #fff;
+        ///      background-color [字符串的其余部分被截断]&quot;; 的本地化字符串。
         /// </summary>
         internal static string NoTunnelPage {
             get {
diff --git a/FastTunnel.Core/TunnelResource.resx b/FastTunnel.Core/TunnelResource.resx
index fb0622b..0fcd6f8 100644
--- a/FastTunnel.Core/TunnelResource.resx
+++ b/FastTunnel.Core/TunnelResource.resx
@@ -117,7 +117,7 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
-  <data name="NoTunnelPage" xml:space="preserve">
+  <data name="NoSite" xml:space="preserve">
     <value>&lt;!DOCTYPE html&gt;
 &lt;html lang="en"&gt;
 
@@ -127,13 +127,8 @@
   &lt;title&gt;FastTunnel&lt;/title&gt;
   &lt;link href="https://cdn.bootcss.com/twitter-bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet"&gt;
   &lt;style&gt;
-    /* Please see documentation at https://docs.microsoft.com/aspnet/core/client-side/bundling-and-minification
-for details on configuring this project to bundle and minify static web assets. */
-
-    a.navbar-brand {
-      white-space: normal;
-      text-align: center;
-      word-break: break-all;
+    .err-info {
+      margin-top: 120px;
     }
 
     /* Provide sufficient contrast against white background */
@@ -207,26 +202,127 @@ for details on configuring this project to bundle and minify static web assets.
 &lt;/head&gt;
 
 &lt;body&gt;
-  &lt;header&gt;
-    &lt;nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3"&gt;
-      &lt;div class="container"&gt;
-        &lt;a class="navbar-brand" src="https://suidao.io"&gt;FastTunnel&lt;/a&gt;
-        &lt;button class="navbar-toggler" type="button" data-toggle="collapse" data-target=".navbar-collapse"
-          aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"&gt;
-          &lt;span class="navbar-toggler-icon"&gt;&lt;/span&gt;
-        &lt;/button&gt;
-      &lt;/div&gt;
-    &lt;/nav&gt;
-  &lt;/header&gt;
-  &lt;div class="container"&gt;
+  &lt;div class="container err-info"&gt;
     &lt;main role="main" class="pb-3"&gt;
       &lt;div class="text-center"&gt;
-        &lt;h1 class="display-4"&gt;找不到隧道&lt;/h1&gt;
+        &lt;h1 class="display-4"&gt;连接内网的服务失败&lt;/h1&gt;
         &lt;p&gt;了解有关 &lt;a target="_blank" href="https://github.com/SpringHgui/FastTunnel"&gt;FastTunel&lt;/a&gt;的信息.&lt;/p&gt;
       &lt;/div&gt;
 
       &lt;blockquote style="padding-top: 4em;"&gt;
-        &lt;p class="lead"&gt;看到本页面表示当前隧道未登录，如果您是当前隧道地址的拥有者，请检查以下原因：&lt;/p&gt;
+        &lt;p class="lead"&gt;您看到本页面表示连接您的内网服务失败，请检查：&lt;/p&gt;
+      &lt;/blockquote&gt;
+      &lt;ol&gt;
+        &lt;li class="lead"&gt;本地是否部署了您的服务&lt;/li&gt;
+        &lt;li class="lead"&gt;配置的本地ip以及端口号是否与您搭建的服务对应&lt;/li&gt;
+        &lt;li class="lead"&gt;如果内网服务不在客户端运行的计算机，请检查您的计算是否与目标计算机位于内网的同一网段&lt;/li&gt;
+      &lt;/ol&gt;
+    &lt;/main&gt;
+  &lt;/div&gt;
+
+  &lt;footer class="border-top footer text-muted"&gt;
+    &lt;div class="container"&gt;
+      &lt;a href="https://github.com/SpringHgui/FastTunnel" target="_blank"&gt;© Power By FastTunnel&lt;/a&gt;
+    &lt;/div&gt;
+  &lt;/footer&gt;
+&lt;/body&gt;
+
+&lt;/html&gt;</value>
+  </data>
+  <data name="NoTunnelPage" xml:space="preserve">
+    <value>&lt;!DOCTYPE html&gt;
+&lt;html lang="en"&gt;
+
+&lt;head&gt;
+  &lt;meta charset="utf-8" /&gt;
+  &lt;meta name="viewport" content="width=device-width, initial-scale=1.0" /&gt;
+  &lt;title&gt;FastTunnel&lt;/title&gt;
+  &lt;link href="https://cdn.bootcss.com/twitter-bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet"&gt;
+  &lt;style&gt;
+    .err-info {
+      margin-top: 120px;
+    }
+
+    /* Provide sufficient contrast against white background */
+    a {
+      color: #0366d6;
+    }
+
+    .btn-primary {
+      color: #fff;
+      background-color: #1b6ec2;
+      border-color: #1861ac;
+    }
+
+    .nav-pills .nav-link.active,
+    .nav-pills .show&gt;.nav-link {
+      color: #fff;
+      background-color: #1b6ec2;
+      border-color: #1861ac;
+    }
+
+    /* Sticky footer styles
+-------------------------------------------------- */
+    html {
+      font-size: 14px;
+    }
+
+    @media (min-width: 768px) {
+      html {
+        font-size: 16px;
+      }
+    }
+
+    .border-top {
+      border-top: 1px solid #e5e5e5;
+    }
+
+    .border-bottom {
+      border-bottom: 1px solid #e5e5e5;
+    }
+
+    .box-shadow {
+      box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .05);
+    }
+
+    button.accept-policy {
+      font-size: 1rem;
+      line-height: inherit;
+    }
+
+    /* Sticky footer styles
+-------------------------------------------------- */
+    html {
+      position: relative;
+      min-height: 100%;
+    }
+
+    body {
+      /* Margin bottom by footer height */
+      margin-bottom: 60px;
+    }
+
+    .footer {
+      position: absolute;
+      bottom: 0;
+      width: 100%;
+      white-space: nowrap;
+      line-height: 60px;
+      /* Vertically center the text there */
+    }
+  &lt;/style&gt;
+&lt;/head&gt;
+
+&lt;body&gt;
+  &lt;div class="container err-info"&gt;
+    &lt;main role="main" class="pb-3"&gt;
+      &lt;div class="text-center"&gt;
+        &lt;h1 class="display-4"&gt;隧道未找到&lt;/h1&gt;
+        &lt;p&gt;了解有关 &lt;a target="_blank" href="https://github.com/SpringHgui/FastTunnel"&gt;FastTunel&lt;/a&gt;的信息.&lt;/p&gt;
+      &lt;/div&gt;
+
+      &lt;blockquote style="padding-top: 4em;"&gt;
+        &lt;p class="lead"&gt;您看到本页面表示当前隧道尚未登录，如果您是当前隧道地址的拥有者，请检查以下原因：&lt;/p&gt;
       &lt;/blockquote&gt;
       &lt;ol&gt;
         &lt;li class="lead"&gt;是否创建了当前子域名的隧道&lt;/li&gt;