无法通过 ssh.Centos 进行身份验证

Question

昨天我试图通过 ssh“ssh demo”进行身份验证并返回以下错误。

ssh：连接到主机IP端口7221：连接被拒绝

如果您需要更多信息，我会提供给您。亲切的问候

ssh -vvv 演示

    255 ↵  ‹ruby-2.2.0›
OpenSSH_6.9p1, LibreSSL 2.1.8
debug1: Reading configuration data /Users/Administrator/.ssh/config
debug1: /Users/Administrator/.ssh/config line 24: Applying options for demo
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 95.87.193.156 [95.87.193.156] port 7221.
debug1: connect to address 95.87.193.156 port 7221: Connection refused
ssh: connect to host 95.87.193.156 port 7221: Connection refused