轻松实现内网端口映射，建立自己的ftp服务器-Easily within the network port mapping, to build their own server

利用windows自带的FTP客户端功能，从指定服务器上传下载文件，特别适合在局域网内网传输文件。-Using windows own FTP client function, uploading and downloading files from the specified server, especially for file transfer in the LAN network.