环境：

ssh secure shell client3.2.9 + PC win10 + 远程主机Linux Ubuntu4.4.0

如题：新建连接之后弹出server responded “Algorithm negotiation failes”错误

解决：

在Linux主机上编辑sshd_config，执行命令

sudo vi /etc/ssh/sshd_config

在配置文件末尾添加

Ciphers aes128-cbc,aes192-cbc,aes256-cbc,aes128-ctr,aes192-ctr,aes256-ctr,3des-cbc,arcfour128,arcfour256,arcfour,blowfish-cbc,cast128-cbc

MACs hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-sha1-96,hmac-md5-96

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,curve25519-sha256@libssh.org

重启sshd服务

sudo  etc/init.d/ssh restart

连接正常

报错原因：ssh升级后，为了安全，默认不再采用原来一些加密算法，需要手工添加进去