用shell防止邮件暴力破解

邮箱服务器是放在内网映射的公司IP，开放端口后，一直被不停的暴力破解，郁闷死了。其中有个IP 有6W多次啊；从而利用脚本屏蔽IP访问。

1、脚本如下：

#! /bin/bash# author: kuangl# mial: kuangl@orient-media.com# date: 2013-05-04source  /etc/profileawk -F"[" '/disconnect from unknown/ {print $NF}' /var/log/maillog |grep -v "189.154.4.22" |sed "s/]//g"|sort -nr|uniq -c|sort|awk '{print $1"="$2}' >/root/bad_ip_tmp.txtawk -F":" '/verification failed/ {print $5}' /var/log/maillog |grep -v "189.154.4.22" |grep -v "SASL"|sort -nr|uniq -c|awk '{print $1"="$2}' >>/root/bad_ip_tmp.txtawk -F"-" '/\/phpmyadmin\/scripts\/setup\.php/  {print $1}' /var/log/httpd/access_log |grep -v "189.154.4.22" |sort -nr|uniq -c |sort  -n |awk '{print $1"="$2}' >>/root/bad_ip_tmp.txtawk -F"-" '/ZmEu/ {print $1}' /var/log/httpd/access_log |grep -v "189.154.4.22" |sort -nr|uniq -c |sort  -n |awk '{print $1"="$2}' >>/root/bad_ip_tmp.txtsort /root/bad_ip_tmp.txt|uniq >/root/bad_ip.txtDEFINE="2"for i in $(cat  /root/bad_ip.txt)doNUM=`echo $i |awk -F"=" '{print $1}'`IP=`echo $i|awk  -F"=" '{print $2}'`if [ $NUM -ge $DEFINE ];theniptables -L -n|grep $IP > /dev/nullif [ $? -gt 0 ];theniptables -I RH-Firewall-1-INPUT 4 -s $IP -j DROPfifidone

2、假如任务计划5分钟运行一次

*/5 * * * *  /home/kuangl/deny_bad_ip_for_smtp.sh0 1 * * *   /etc/init.d/iptables restart

3、查看防火墙

DROP       all  --  192.241.206.14       0.0.0.0/0DROP       all  --  198.50.251.242       0.0.0.0/0DROP       all  --  198.23.245.154       0.0.0.0/0DROP       all  --  217.139.66.140       0.0.0.0/0DROP       all  --  134.0.27.102         0.0.0.0/0DROP       all  --  218.22.226.6         0.0.0.0/0DROP       all  --  218.22.226.5         0.0.0.0/0DROP       all  --  202.158.163.158      0.0.0.0/0DROP       all  --  109.169.86.193       0.0.0.0/0