The default log level should be WARN which will write a message to the log file only if a request has been blocked.

默认的日志记录级别应该是WARN，它只在已经阻止了请求的情况下在日志文件中写消息。

youdao

A blocked attempt by a user from the host dev01, via the rules applied in the hosts.allow file, could be.

由于应用了hosts . allow文件中的规则，来自主机dev01的用户的连接尝试被拒绝，其消息如下。

youdao

And last but not least, someone downloading mail at work may find that some file types are blocked by default, thus they may never even receive the file.

最后但并非不重要的是，有些人工作的时候下载邮件会发现有些文件类型被禁用了，因此可能再也不会接受到这些文件。

youdao