DOS攻击防范（自动屏蔽攻击IP）

#!/bin/bash

DATE=$(date +%d/%b/%Y:%H:%M)

#nginx日志

LOG_FILE=/usr/local/nginx/logs/demo2.access.log

#分析ip的访问情况

ABNORMAL_IP=$(tail -n5000 $LOG_FILE |grep $DATE |awk '{a[$1]++}END{for(i in a)if(a[i]>10)print i}')

for IP in $ABNORMAL_IP; do

if [ $(iptables -vnL |grep -c "$IP") -eq 0 ]; then

iptables -I INPUT -s $IP -j DROP

echo "$(date +'%F_%T') $IP" >> /tmp/drop_ip.log

fi

done