场景：有时候可以利用windows本身设置ip端口转发。
1.添加一个端口映射
netsh interface portproxy add v4tov4 listenaddress=大网IP listenport=端口 connectaddress=要映射的小网IP connectport=端口
例：访问本地127.0.0.1:80 跳转 183.192.162.133:10008
netsh interface portproxy add v4tov4 listenaddress=127.0.0.1 listenport=80 connectaddress=183.192.162.133 connectport=10008
2.查看存在的转发
netsh interface portproxy show v4tov4【all】
3.删除某条规则
netsh interface portproxy delete v4tov4 listenaddress=IP listenport=端口
例：
netsh interface portproxy delete v4tov4 listenaddress=127.0.0.1 listenport=80
