使用DenyHosts防止ssh暴力破解

DenyHosts是用python2.3编写的一个程序，会剖析/var/log/secure等文件，当发现同一个ip进行屡次ssh登录失败时会将其写入/etc/hosts.dengy文件，达到屏蔽该ip的目标。
Centos7应用DenyHosts避免ssh暴力破解Centos7应用DenyHosts避免ssh暴力破解

下载DenyHosts包
[root@localhost ~]# wget http://jaist.dl.sourceforge.n…
装置DenyHosts
[root@localhost ~]# tar xf DenyHosts-2.6.tar.gz
[root@localhost ~]# cd DenyHosts-2.6
[root@localhost DenyHosts-2.6]# python setup.py install
制作配置文件
[root@localhost DenyHosts-2.6]# cp denyhosts.cfg-dist /etc/denyhosts.cfg
[root@localhost DenyHosts-2.6]# cp daemon-control-dist daemon-control
[root@localhost DenyHosts-2.6]# chown root daemon-control
[root@localhost DenyHosts-2.6]# chmod 700 daemon-control
批改配置文件
将daemon-control中的#DENYHOSTS_CFG = “/usr/share/denyhosts/denyhosts.cfg”改为 DENYHOSTS_CFG = “/etc/denyhosts.cfg”
Centos7应用DenyHosts避免ssh暴力破解Centos7应用DenyHosts避免ssh暴力破解

启动
[root@localhost DenyHosts-2.6]# ./daemon-control start（留神相对路径）
测试另外一台服务器近程连贯172.16.1.16
默认容许五次，测试发现登陆失败五次之后不容许登陆

[root@localhost ~]# ssh [email protected]
[email protected]’s password:
Permission denied, please try again.
[email protected]’s password:
Permission denied, please try again.
[email protected]’s password:
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
[root@localhost ~]#
[root@localhost ~]# ssh [email protected]
[email protected]’s password:
Permission denied, please try again.
[email protected]’s password:
Permission denied, please try again.
[email protected]’s password:
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
[root@localhost ~]# ssh [email protected]
[email protected]’s password:
Permission denied, please try again.
[email protected]’s password:
Permission denied, please try again.
[email protected]’s password:
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
[root@localhost ~]# ssh [email protected]
[email protected]’s password:
Permission denied, please try again.
[email protected]’s password:
Permission denied, please try again.
[email protected]’s password:
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
[root@localhost ~]# ssh [email protected]
ssh_exchange_identification: read: Connection reset by peer
查看hosts.deny文件
登陆间断失败之后就会把ip地址写在hosts.deny文件
Centos7应用DenyHosts避免ssh暴力破解Centos7应用DenyHosts避免ssh暴力破解
172.16.1.112的ip曾经被限度，到此性能实现。

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