After some time of downloading torrents via Transmission the internet connection stops working, causing both torrents and sites to not load. This only happens on my machine (meaning other computers/tablets/smartphones in the house can browse just fine) and internet comes back exactly after I log out.

What is a little strange , as well, is that network manager shows that i am connected - i can also access the router's page at the time I am "offline"

Using utorrent to download torrents from windows 7 doesn't cause the same problem - neither using transmission on another ubuntu system running in the same network

I am connected using wi-fi, if that matters at all