Routers define the target IP address and port of the destination server, based on information that is available before the Zorp proxy is started. The simplest router (DirectedRouter) selects a preset destination as the server address, while the most commonly used TransparentRouter connects to the IP address requested by the client. Other routers may make more complex decisions. The destination address selected by the router may be overridden by the proxy and the DNAT classes used in the service.