Connection timed out, or invalid response from the timestamp server.
连接超时，或者时间戳服务器的响应无效。
Other results, such as No route to host or Connection timed out, can mean the same thing.
其他结果，比如Noroutetohost或Connection timed out如出一辙。
Connection timed out the remote host or network may be down. Please try the request again.
您要连结的网络服务器或网络可能发生故障。请稍后再试。
If you provided a wrong sequence of knocks (or no knocks at all), you would receive a "Connection timed out" message, and the SSH port would remain completely closed with no sign of its existence.
如果提供了错误的敲门序列(或根本没有敲门)，会收到“Connection timed out”消息，SSH端口仍然完全关闭，看不出它是存在的。
No backend server available for connection: timed out after 20 seconds.
的意思不提供后勤服务方面：经过了20秒的时间。
No backend server available for connection: timed out after 20 seconds.
的意思不提供后勤服务方面：经过了20秒的时间。
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