我正在尝试从PC与远程服务器建立ssh连接，但是出现以下错误：
ssh_exchange_identification: Connection closed by remote host
我检查了host.deny文件，我的IP地址不存在。我可以从其他本地ubuntu计算机登录到此远程服务器。我还可以从另一台远程计算机登录到所需的远程服务器。
我也可以从PC登录到其他远程服务器，但是该特定服务器有问题。
当我尝试检查问题时，我得到了：
ssh -vvv root@host -p 22
OpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5
debug3: Failed to open file:C:/Users/nenko/.ssh/config error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2
debug2: resolving "23088.s.hostens.cloud" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 23088.s.hostens.cloud [109.235.70.56] port 22.
debug1: Connection established.
debug3: Failed to open file:C:/Users/nenko/.ssh/id_rsa error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_rsa.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_rsa type -1
debug3: Failed to open file:C:/Users/nenko/.ssh/id_rsa-cert error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_rsa-cert.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_rsa-cert type -1
debug3: Failed to open file:C:/Users/nenko/.ssh/id_dsa error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_dsa.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_dsa type -1
debug3: Failed to open file:C:/Users/nenko/.ssh/id_dsa-cert error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_dsa-cert.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_dsa-cert type -1
debug3: Failed to open file:C:/Users/nenko/.ssh/id_ecdsa error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_ecdsa.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_ecdsa type -1
debug3: Failed to open file:C:/Users/nenko/.ssh/id_ecdsa-cert error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_ecdsa-cert.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_ecdsa-cert type -1
debug3: Failed to open file:C:/Users/nenko/.ssh/id_ed25519 error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_ed25519.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_ed25519 type -1
debug3: Failed to open file:C:/Users/nenko/.ssh/id_ed25519-cert error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_ed25519-cert.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_ed25519-cert type -1
debug3: Failed to open file:C:/Users/nenko/.ssh/id_xmss error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_xmss.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_xmss type -1
debug3: Failed to open file:C:/Users/nenko/.ssh/id_xmss-cert error:2
debug3: Failed to open file:C:/Users/nenko/.ssh/id_xmss-cert.pub error:2
debug1: key_load_public: No such file or directory
debug1: identity file C:\\Users\\nenko/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_7.7
ssh_exchange_identification: Connection closed by remote host
如果您知道问题出在哪里，请给出详尽的解释！ 谢谢