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@Novi_CN 要访问公网最终要到一个公网IP上面的，否则服务器无法给你回传数据，但这不代表公网IP给到了家庭光猫，现在家宽基本不可能连申请都没有就有公网IPV4。UPNP启用直接在光猫中用超级管理员用户就可以启用了，用不着单买路由器。没有公网IP不需要做什么端口映射，没有作用