Thanks, got buste - hacked - yesterday and having a heckofa time cheking items.
In that case, you might want to check the "Foreign Address" IP addresses. Especially if you see "Established" in the 'State' column. But in a normal environment, connections are constantly being made and broken and it's not unusual to see hundreds of entries when doing a 'netstat -a'
Wireshark should help you see whats going in or out of your network. A good firewall will also do this. (My personal preference is Comodo)