Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1986-2001 Microsoft Corp. C:\WINDOWS>netsh interface portproxy set v4tov4 ?
Usage: set v4tov4 [listenport=]|[connectaddress=]|[[connectport=]|][[listenaddress=]|][[protocol=]tcp]
listenport - IPv4 port on which to listen.
connectaddress - IPv4 address to which to connect.
connectport - IPv4 port to which to connect.
listenaddress - IPv4 address on which to listen.
protocol - Protocol to use. Currently only TCP is supported.
Remarks: Updates an entry to listen on for IPv4 and proxy connect to via IPv4.