Thanks a lot for your response! If I understand well, you are saying that if I open a port by creating an inbound rule on Windows Firewall it will no appear on netstat results?
Well, to be specific, I need to conect remotely to a SQL Server Analysis Services cube. Because I'm using a named instance, I need to open TCP port 2382 and UDP port 1434 for SQL Browser. Somehow, 2382 port is in listening mode, and when I run "Advanced Port Scanner" it show its opened. But I don't know how to open 1434 UDP port, as I said I've added this port to Windows Firewall, and nothing happens. I know this could be SSAS configuration, and that's another topic but my question is, what if i want to "close" 2382 port? Just for testing I've blocked 2382 port in Windows Firewall, and the port scanner shows it opened!