Server responded" Algorithm negotiation failed"

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ubuntu 15.10 安装 openssh-server后，使用ssh客户端连接时可能报此错误，情况如上图所示

server responded "algorithm negotiation failed”

解决方法

修改ssh的配置文件 /etc/ssh/sshd_config

在配置文件中添加：

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服务后（sudo service ssh restart），即可正常连接

Server responded" Algorithm negotiation failed"

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原文地址：http://www.cnblogs.com/l-xxx-10000/p/5417834.html