The outsider must know the port number and the password to use SSH, as well as the knock sequence required to open that port and enable the password.
外面的用户必须知道使用SSH所需的端口号和密码，还必须知道打开端口并启用密码所需的敲门序列。
The outsider must know the port number and the password to use SSH, as well as the knock sequence required to open that port and enable the password.
外面的用户必须知道使用SSH所需的端口号和密码，还必须知道打开端口并启用密码所需的敲门序列。
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