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HTTP 511 Network Authentication Required响应状态码指示客户端需要进行身份验证才能获得网络访问权限。

这种状态不是由原始服务器生成的，而是通过拦截代理来控制对网络的访问。

网络运营商在授予访问权限之前（例如在网吧或机场）有时需要一些认证，接受条款或其他用户互动。他们通常使用媒体访问控制（MAC）地址识别尚未这样做的客户。

状态

511 Network Authentication Required

规范

规范	标题
RFC 6585，第6节：511网络认证要求	其他 HTTP 状态码

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