diff --git a/webssh/settings.py b/webssh/settings.py
index 281a8b5..f03b4b3 100644
--- a/webssh/settings.py
+++ b/webssh/settings.py
@@ -45,7 +45,7 @@ define('origin', default='same', help='''Origin policy,
 '<domains>': custom domains policy, matches any domain in the <domains> list
 separated by comma;
 '*': wildcard policy, matches any domain, allowed in debug mode only.''')
-define('wpintvl', type=float, default=0, help='Websocket ping interval')
+define('wpintvl', type=float, default=30, help='Websocket ping interval')
 define('timeout', type=float, default=3, help='SSH connection timeout')
 define('delay', type=float, default=3, help='The delay to call recycle_worker')
 define('maxconn', type=int, default=20,
diff --git a/webssh/static/js/main.js b/webssh/static/js/main.js
index 5d40e9c..58daf92 100644
--- a/webssh/static/js/main.js
+++ b/webssh/static/js/main.js
@@ -52,6 +52,7 @@ jQuery(function($){
       debug = document.querySelector(form_id).noValidate,
       custom_font = document.fonts ? document.fonts.values().next().value : undefined,
       default_fonts,
+      current_terminal,
       DISCONNECTED = 0,
       CONNECTING = 1,
       CONNECTED = 2,
@@ -475,9 +476,40 @@ jQuery(function($){
   }
 
 
+  function clear_terminal() {
+    if (current_terminal) {
+      try {
+        current_terminal.dispose();
+      } catch (e) {
+        console.error(e);
+      }
+      current_terminal = undefined;
+    }
+    $('#terminal').removeClass('terminal-fullscreen').empty();
+  }
+
+
+  function write_disconnect_message(term, reason) {
+    var text = translate_status(reason) || '连接已断开。';
+
+    if (term) {
+      try {
+        term.write('\r\n\r\n\x1b[33m' + text + '\x1b[0m\r\n');
+        term.setOption('disableStdin', true);
+      } catch (e) {
+        console.error(e);
+      }
+    }
+
+    return text;
+  }
+
+
   function log_status(text, to_populate) {
     text = translate_status(text);
-    console.log(text);
+    if (text) {
+      console.log(text);
+    }
     status.text(text);
 
     if (to_populate && validated_form_data) {
@@ -510,7 +542,17 @@ jQuery(function($){
       ['Missing value username', '请输入 SSH 用户名。'],
       ['Missing argument hostname', '缺少主机地址。'],
       ['Missing argument username', '缺少 SSH 用户名。'],
-      ['Need a verification code for 2fa.', '需要输入动态验证码。']
+      ['Need a verification code for 2fa.', '需要输入动态验证码。'],
+      ['Login required.', '登录状态已失效，请重新登录。'],
+      ['Websocket authentication failed.', 'WebSocket 认证失败。'],
+      ['websocket closed', 'WebSocket 连接已关闭。'],
+      ['client disconnected', '客户端连接已断开。'],
+      ['chan closed', 'SSH 会话已关闭。'],
+      ['chan error on reading', '读取 SSH 会话时连接中断。'],
+      ['chan error on writing', '写入 SSH 会话时连接中断。'],
+      ['worker recycled', '连接等待超时，已被回收。'],
+      ['Worker closed', 'SSH 工作连接已关闭。'],
+      ['No worker found', '未找到活动的 SSH 连接。']
     ];
 
     var i, item;
@@ -581,7 +623,9 @@ jQuery(function($){
       }
     }
 
+    clear_terminal();
     var term = new window.Terminal(termOptions);
+    current_terminal = term;
 
     term.fitAddon = new window.FitAddon.FitAddon();
     term.loadAddon(term.fitAddon);
@@ -749,11 +793,13 @@ jQuery(function($){
     };
 
     sock.onclose = function(e) {
-      term.dispose();
-      term = undefined;
+      var reason = write_disconnect_message(term, e.reason);
+
+      $('#terminal').removeClass('terminal-fullscreen');
       sock = undefined;
       reset_wssh();
-      log_status(e.reason, true);
+      log_status(reason, true);
+      term = undefined;
       state = DISCONNECTED;
       default_title = 'WebSSH';
       title_element.text = default_title;