diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index 8a7364da..2a0b28fa 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -3428,7 +3428,7 @@ class SSH2
      */
     function isConnected()
     {
-        return (bool) ($this->bitmap & self::MASK_CONNECTED);
+        return ($this->bitmap & self::MASK_CONNECTED) && is_resource($this->fsock) && !feof($this->fsock);
     }
 
     /**