首先安装IPV6（xp下IPV6必须安装，否则端口转发不可用！）
netsh interface ipv6 install添加一个IPV4到IPV4的端口映射
netsh interface portproxy add v4tov4 listenaddress=192.168.193.1 listenport=22 connectaddress=xxx.xxx.xxx.xxx connectport=22指定监听ip和端口可以删除
netsh interface portproxy delete v4tov4 listenaddress=192.168.193.1 listenport=22可以查看存在的转发
netsh interface portproxy show all