Even if a visitor to NHS Choices is not logged into Facebook, the social networking site will still receive the person's IP address and operating system version, but not their user ID.
如果访问NHS精选网站的用户并没有同时登录Facebook，那么，Facebook这一社交网站也能够获得用户的IP地址和操作系统信息，但是，这其中并不包含用户的ID号信息。
This feature can be used when you want to allow only a few IP addresses to be logged into the database at a particular time.
如果想在一个特定的时候只允许部分IP地址登录进数据库，那么可以使用该特性。
It keeps anomaly scores for each request, IP addresses, application sessions, and user accounts. Requests with high anomaly scores are either logged or rejected altogether.
它统计每个请求的有关IP地址、应该连接、和用户帐户的异常分数，当出现较高的异常分数时，会记录日志并完全的阻止访问。
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