Getting onReceive callback for chrome UDP socket on Windows

I am creating packaged app for chrome and using UDP socket to receive a broadcast message registering for onReceive callback for the socket created.

On Linux (Ubuntu 14.04 to be specific) I receive the callback as expected.

But on Windows (Windows 7 to be specific) I don't get the callback.

I guessed it is issue with firewall and opened the port I was using for the chrome browser as described here

Now everything works fine.

My question is , is this the only solution? Users who install my app need to manually open the port as above or is there any alternatives available?

Thanks in advance.