Ports and BitTorrent

[JUSTICE]

I use Bittorrent 6.1.1. Everything works perfectly and yet I have any open port. Yes but when I type the command netstat-an, my computer tells me that the required port is open. However, in the download window icon tells me that Miss port for incoming connections is closed? Who can explain this? Moreover what firewall to use and how to set? Thank you for your reply.

[Zachary]

hello
bitorrent configures itself alone (which is good)
the port must be opened in your firewall but not in your router

[JUSTICE]

It is unnecessary that I open a port in my live box?