The biggest change is the network identity of the disaster recovery server.

最大的变化是灾难恢复服务器的网络标识。

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The PIM server then notifies subscribing service users, such as conference participants, of the identity of the service provider that is registered on the network.

PIM服务器随后向诸如会议参与者的预约服务用户通知在网络上登记的服务提供者的标识。

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Otherwise, your server can be used by any client to access arbitrary hosts while hiding his or her true identity. This is dangerous both for your network and for the Internet at large.

则你的服务器可以让使用任何客户端的用户访问任意主机，而他或她的真实身份将被隐藏(客户端都被认为是代理服务器在访问任意主机)。

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