do not allow just any socket to connect

src/sockets.js

@@ -265,9 +265,11 @@ module.exports = (
     const isNotificationsSocket = !!socket.handshake.query
       .IS_NOTIFICATIONS_SOCKET
 
-    if (!isLNDSocket) {
-      /** printing out the client who joined */
     logger.info('New socket client connected (id=' + socket.id + ').')
+
+    if (!isLNDSocket) {
+      // let's not allow this
+      return
     }
 
     if (isLNDSocket) {