我刚刚在我的服务器上安装了安装的debian 9。 在这个过程中，我使用SSH连接时遇到了一个相当奇怪的行为。 有时候，连接到我的服务器可以很好地工作，其他时间不是这样。
我安装的唯一东西是openssh-server，apt-get install openssh-server，它运行时使用默认设置。
我注意到我的SSH客户端的日志，Bitvise 6.24服务器在连接时响应不同的版本。 有时会说SSH-2.0-OpenSSH_5.8 ，然后我无法连接。 当它说SSH-2.0-OpenSSH_7.4p1 Debian-10它工作得很好。 我对Debian来说很新，也不知道为什么它的行为如此。 在我的机器上运行openssh-server可能有多个版本吗？ 我试图排除故障，但没有得到多less。 这是你们以前看过的东西，还是知道如何解决？
21:11:41.304 Started a new SSH2 session. 21:11:41.314 Connecting to SSH2 server XXX.XXX.XXX.XXX:22. 21:11:41.507 Connection established. 21:11:41.798 Server version: SSH-2.0-OpenSSH_5.8 <----- 21:11:41.798 First key exchange started. 21:11:42.438 Received a new host key from the server. Algorithm: ............ 21:11:44.331 First key exchange completed using ecdh-sha2/nistp521. ............ 21:11:44.412 Attempting password authentication. 21:11:45.798 Authentication failed. Remaining authentication methods: 'password'. 21:11:57.650 Authentication aborted on user's request. 21:11:57.720 The SSH2 session has been terminated. 21:12:13.332 Started a new SSH2 session. 21:12:13.342 Connecting to SSH2 server XXX.XXX.XXX.XXX:22. 21:12:13.407 Connection established. 21:12:13.472 Server version: SSH-2.0-OpenSSH_7.4p1 Debian-10 <----- 21:12:13.472 First key exchange started. 21:12:13.632 Received a new host key from the server. Algorithm: ............ 21:12:15.380 First key exchange completed using ecdh-sha2/nistp521. ............ 21:12:15.441 Attempting password authentication. 21:12:15.551 Authentication completed. 21:12:15.691 Terminal channel opened.