No, most things are blocked out of the box. Check your ports via Shieldsup! (Google it).
Only thing I had to change to get it to pass on ShieldsUp! was to block ICMP echo (ping).
Excellent, just did that check and yes, it's saying that i will respond to a Ping request. From reading up it looks like the internet equivalent of trying to say good morning to everyone you meet on the tube, so I think I'll turn it off
