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OSX-ssh 由于各种原因不断失败

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OSX-ssh 由于各种原因不断失败

我使用 ssh 正常连接到我的 digitalocean droplet。最近，它们突然全部停止工作，我无法访问它们，但它们突出显示了不同的原因。

  1. Connection closed
  2. Operation Timeout

当使用运行时-v，我得到以下信息：

OpenSSH_6.9p1, LibreSSL 2.1.8
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug1: /etc/ssh/ssh_config line 102: Applying options for *
debug1: Connecting to 12.345.678.900 [12.345.678.900] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file cooing.pem type -1
debug1: key_load_public: No such file or directory
debug1: identity file cooing.pem-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.9
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.6
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.6 pat OpenSSH_6.6.1* compat 0x04000000
debug1: Authenticating to 46.101.107.176:22 as 'root'
debug1: SSH2_MSG_KEXINIT sent
Connection closed by 12.345.678.900

我无法弄清楚导致此类问题的可能原因是什么

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