Transmission tracker and/or torrent traffic through proxy
The proxy support in transmission was removed some months ago. The best option at the moment seems to use a wrapper library like torsocks. You can install it using apt-get (or any other method). Now there is a file torsocks.conf in /etc. Here you enter your server address:
server = 192.168.2.7
server_type = 5
server_port = 8080
Now you can start transmission with torsocks transmission and your traffic will redirected to the SOCKS server.