wget -c
yum install fail2ban


# tar -xjvf fail2ban-0.8.4.tar.bz2
# cd fail2ban-0.8.4
# python install
# cp files/redhat-initd /etc/init.d/fail2ban
# chkconfig –add fail2ban
# chkconfig fail2ban on
# service fail2ban start

[root@mail fail2ban]# pwd
[root@mail fail2ban]# ll
total 20
drwxr-xr-x 2 root root 4096 Mar 29 15:08 action.d  动作
-rw-r--r-- 1 root root  844 Sep 16  2009 fail2ban.conf 日志级别,日志输入,日志soeket三个配置项
drwxr-xr-x 2 root root 4096 Mar 29 15:08 filter.d  要过滤的日志文件配置
-rw-r--r-- 1 root root 6545 Mar 29 15:53 jail.conf 主配置文件,IP白名单,尝试次数,屏蔽时长,过滤选项等
[root@mail fail2ban]# 

[root@mail fail2ban]# cd filter.d/
[root@mail filter.d]# ls
apache-auth.conf     apache-noscript.conf   courierlogin.conf  exim.conf              named-refused.conf  postfix.conf    qmail.conf  sshd.conf       webmin-auth.conf
apache-badbots.conf  apache-overflows.conf  couriersmtp.conf   gssftpd.conf           pam-generic.conf    proftpd.conf    sasl.conf   sshd-ddos.conf  wuftpd.conf
apache-nohome.conf   common.conf            cyrus-imap.conf    lighttpd-fastcgi.conf  php-url-fopen.conf  pure-ftpd.conf  sieve.conf  vsftpd.conf     xinetd-fail.conf

[root@mail filter.d]# fail2ban-client status
|- Number of jail:      1
`- Jail list:           ssh-iptables

[root@mail filter.d]#   iptables -L -vnx
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
    pkts      bytes target     prot opt in     out     source               destination         
     441    32124 fail2ban-SSH  tcp  --  *      *             tcp dpt:22 

[root@mail filter.d]#  cat /var/log/faillog 

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