郵箱服務器是放在內網映射的公司IP，開放端口後，一直被不停的暴力破解，鬱悶死了。其中有個IP 有6W多次啊；從而利用腳本屏蔽IP訪問。
1、腳本如下：
#! /bin/bash # author: kuangl # mial: [email protected] # date: 2013-05-04 source /etc/profile awk -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.txt awk -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.txt awk -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.txt awk -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.txt sort /root/bad_ip_tmp.txt|uniq >/root/bad_ip.txt DEFINE="2" for i in $(cat /root/bad_ip.txt) do NUM=`echo $i |awk -F"=" '{print $1}'` IP=`echo $i|awk -F"=" '{print $2}'` if [ $NUM -ge $DEFINE ]; then iptables -L -n|grep $IP > /dev/null if [ $? -gt 0 ]; then iptables -I RH-Firewall-1-INPUT 4 -s $IP -j DROP fi fi done
2、假如任務計劃5分鐘運行一次
*/5 * * * * /home/kuangl/deny_bad_ip_for_smtp.sh 0 1 * * * /etc/init.d/iptables restart
3、查看防火牆
DROP all -- 192.241.206.14 0.0.0.0/0 DROP all -- 198.50.251.242 0.0.0.0/0 DROP all -- 198.23.245.154 0.0.0.0/0 DROP all -- 217.139.66.140 0.0.0.0/0 DROP all -- 134.0.27.102 0.0.0.0/0 DROP all -- 218.22.226.6 0.0.0.0/0 DROP all -- 218.22.226.5 0.0.0.0/0 DROP all -- 202.158.163.158 0.0.0.0/0 DROP all -- 109.169.86.193 0.0.0.0/0