原文链接--https://blog.csdn.net/zhongkaigood/article/details/82910338
rhel6.6
Nessus安全扫描中发现漏洞：
SSH Weak Algorithms Supported
Nessus has detected that the remote SSH server is configured to use the Arcfour stream cipher or no cipher at all. RFC 4253 advises against using Arcfour due to an issue with weak keys.
root用户中输入
vi /etc/ssh/sshd_config
文件的最下方添加下面两行内容保存：
Ciphers aes128-ctr,aes192-ctr,aes256-ctr
MACs hmac-sha1,hmac-ripemd160
重启sshd 服务
service sshd restart
完成