Not showing connection! bug/vulnerability?

Using on Win XP SP2. Public IP.
Firewall on Custom policy mode.
Starting apache service and everyone from internet able to connect! The strange thing is that in View Active Connections at that time I only see that apache is listening on port 80 (0 bytes in/out)!!
Even if this is some setting that allows apache(but really there is no rule for apache to allow such connection) I should see connection and traffic! Is this something known?

Looking forward for some advise.