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“Connectiontimed out”消息，SSH端口仍然完全关闭，看不出它是存在的。
Software usually jumps to the erroneous conclusion that out-of-sequence input means wrong input, so it issues an evil error message box.
软件则会草率地下结论，认为违反顺序就是错误的输入，并且发起讨厌的错误消息框。
Software usually jumps to the erroneous conclusion that out-of-sequence input means wrong input, so it issues an evil error message box.
软件则会草率地下结论，认为违反顺序就是错误的输入，并且发起讨厌的错误消息框。
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