如果在你的电脑上只有一个“本地连接”，而内外网又不能同时连接（如：企业的财务部门），内网地址又必须是固定IP的，本软件只能操作内外网的切换。-If your computer has only one " local connection" inside and outside the network connection (such as: the financial sector), within the network address must be a fixed IP