Key exchange was not finished, connection is closed.解决办法

错误

利用

java

连接

Linux

服务器中碰到错误：

Key exchange was not finished, connection is closed.

，导致服务器的连接失败，报错如下

原因

是

ssh

中的

key

交换算法不兼容导致

解决办法

修改配置文件

vi /etc/ssh/sshd_config

添加如下内容

KexAlgorithms diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group1-sha1,[email protected]

重启服务

systemctl restart sshd

启动报错

如果重新启动

ssh

出现错误

Start operation timed out. Terminating.Failed to start openbsd secure shell server

，可以尝试如下解决办法

关闭由systemctl控制的ssh启动

systemctl stop ssh.service 

删除ssh的服务配置文件

rm /lib/systemd/system/ssh.service

重载

systemctl

和

ssh

服务

systemctl daemon-reload
systemctl start ssh.service

祝大家好运