Port Scanning

[Belix]

Still not sure why the portscan does not find the open Blizzard ports.

If my understanding of network architecture is correct, a port scan can only detect that a port is open if said port responds. In this case, most likely no program is running on your computer that is listening those ports to issue such any response.

Many programs, including Blizzard's games, probably issue no response whatsoever if they receive unexpected data on their port, and simply discard the packet.

Usually a port scan will only illicit responses from common utility ports often bound to internet related features of an operating system, such as Windows FTP (file transfer protocol) services. Sometimes that reply is merely to say, "This port is closed."

Ideally, no port responds to any type of scan. This helps hide the presence of a computer from people looking for random targets.