You have a proxy server that performs important authorization to limit who can access what applications at a coarse grained level.
有一个代理服务器，它执行重要的授权，以很粗的粒度限制谁可以访问什么应用程序。
Proxy authentication and authorization: the middle-tier server performs authentication.
代理身份验证和授权：中间层服务器执行身份验证。
The request requires user authorization. The client must first authenticate itself with the proxy.
该请求需要用户验证。客户端首先必须通过代理进行自我验证。
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