[ Thanks to Falko Timme for this link. ]
“This tutorial is based on a LAN setup, but it should
also be applicable for an Internet seedbox (e.g. on a vps or
rootds), but some additional steps may need to be performed
(firewall, securing rpc-mount, generally hardening of the server).“The best lightweight software combination for a seedbox is
lighttpd with rtorrent/libtorrent and a nifty web interface. So we
use avalanche-rt, an actively developed project which looks very
promising