问题描述:
Ubuntu 16.04安装openssh-server后,使用ssh客户端连接时可能报此错误,情况如下图所示:
== server responded "algorithm negotiation failed”
解决方案,步骤如下所示:
1、下载另一个连接服务器的工具 - putty
2、使用putty连接服务器,参考这里
3、修改服务器端ssh的配置文件,目录为:/etc/ssh/sshd_config,输入如下命令进行编辑
== sudo vim /etc/ssh/sshd_config
4、在配置文件中增加以下内容(vim编辑时,右键可快速粘贴):
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,[email protected],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,[email protected]
# 修改ssh的配置文件
vim /etc/ssh/sshd_config
# 允许root用户登录,将“PermitRootLogin without-password”更改为
PermitRootLogin yes
# 在配置文件中添加如下内容(除了第三条的最后一个是灰色加紫色,其他的是蓝色,如果是灰色说明不对!)
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,[email protected],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,[email protected]
5、重启sshd服务,输入如下命令:
== sudo /etc/init.d/ssh restart
打开SSH Secure再次尝试连接,如下图所示:successful!!
参考文献:
1、【Linux教程】http://www.linuxdiyf.com/linux/24314.html