怎么样登录OPENSSH

juliaugong

我用TELNET localhost 22命令登录的时候显示
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
SSH-1.99-OpenSSH_3.5p1

然后我按回车,就提示
Protocol mismatch.
Connection closed by foreign host.
这是怎么回事
谢谢!