1) The document discusses how to configure port forwarding (virtual server) on various ASUS router models to allow remote access to network services and applications like BitTorrent that normally cannot be accessed from outside the local network due to NAT.
2) It provides examples of setting up port forwarding for BitTorrent on WL-5xx, WL-600g, WL-700gE, RX3041/SL200, and SL500/SL1000/SL1200 routers, with screenshots of the configuration pages and steps to configure the external and internal ports and the local server IP address.
3) In addition to BitTorrent, it lists many common network services, protocols, and applications along with their default TCP