diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index b6068294..0def1907 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -3290,7 +3290,7 @@ class SSH2
      */
     public function isConnected()
     {
-        return (bool) ($this->bitmap & self::MASK_CONNECTED);
+        return ($this->bitmap & self::MASK_CONNECTED) && is_resource($this->fsock) && !feof($this->fsock);
     }
 
     /**