diff --git a/lib/config_default.py b/lib/config_default.py
index 2afde96..935748f 100755
--- a/lib/config_default.py
+++ b/lib/config_default.py
@@ -44,10 +44,18 @@ THREAD_POOL_SIZE = 300
 
 # Do you want to expose "example" service in server?
 # Useful for learning the server,you probably want to disable
+# Disable the example service
 ENABLE_EXAMPLE_SERVICE = False
+
+# Port used for Socket transport. Use 'None' for disabling the transport.
+LISTEN_SOCKET_TRANSPORT = 3333
+# Port used for HTTP Poll transport. Use 'None' for disabling the transport
 LISTEN_HTTP_TRANSPORT = None
+# Port used for HTTPS Poll transport
 LISTEN_HTTPS_TRANSPORT = None
+# Port used for WebSocket transport, 'None' for disabling WS
 LISTEN_WS_TRANSPORT = None
+# Port used for secure WebSocket, 'None' for disabling WSS
 LISTEN_WSS_TRANSPORT = None
 # ******************** SSL SETTINGS ******************