WRT160N redirection port uninvited?

I have a WRT160N v3 where I haven't activated port forwarding rules. When running utorrent on one of my computers on the network, I was surprised that he was able to accept incoming connections from the internet. How is that possible? In fact, after I put another pc to be the dmz server in the network, utorrent was still able to get incoming connections from the internet when running on the first pc. Am I missing something here?

UPnP is enabled? It can allow internal applications such as automatic port forwarding torrent clients...

Tags: Linksys Routers

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