#!/bin/bash #auto drop ssh failed IP address #by colink on 2015-05-07 IPTAB_DIR=‘/etc/sysconfig/iptables‘ LOG_DIR=‘/var/log/secure‘ IPADDRS=`tail -n 200 ${LOG_DIR} |grep "Failed password" |grep -Eo ‘([0-9]{1,3}\.){3}[0-9]{1,3}‘ |sort -nr |uniq -c |awk ‘$1>=5 {print $2}‘` echo -e "\033[32m====================================\033[0m" echo -e "\033[32mWill update the Iptables\033[0m" echo -e "\033[32m------------------------------------\033[0m" #判断iptables文件里面是否已经添加了该IP的规则 function add_iptables(){ for i in ${IPADDRS} do IGREP=`grep "${i}" /etc/sysconfig/iptables` if [ -z "${IGREP}" ];then sed -i "/lo/a-A INPUT -s ${i} -m state --state NEW -m tcp -p tcp --dport 22 -j DROP" ${IPTAB_DIR} if [ $? -eq 0 ];then echo -e "\033[32m已成功将IP:${i}添加到防火墙...\033[0m" else echo -e "\033[31m添加IP:${i}的防火墙规则失败!\033[0m" fi else echo -e "\033[32m防火墙规则里已存在IP:${i}\033[0m" # exit 0 fi done } #当有恶意IP的时候,添加到防火墙 if [ ! -z "${IPADDRS}" ];then add_iptables else echo -e "\033[31m没有恶意登陆的IP...\033[0m" exit 0 fi #重启iptables服务 /etc/init.d/iptables restart echo -e "\033[32m====================================\033[0m"
时间: 2024-10-06 01:04:09