Advanced proxy usage
Sometime application don't support proxy.... and it is a big problem, because you can not access internet directly or really need to hide you ip.
In this case Linux(Debian) users can use dante-client
sudo apt-get install dante-client
append next lines
route { from: 0.0.0.0/0 to: 0.0.0.0/0 via: proxy.example.com port = 3128 proxyprotocol: http_v1.0 }
to /etc/dante.conf
and simple run you program with socksify, for example
socksify kopete