Home | 簡體中文 | 繁體中文 | 雜文 | 打賞(Donations) | ITEYE 博客 | OSChina 博客 | Facebook | Linkedin | 知乎專欄 | Search | Email

33.3. 防禦腳本

#!/bin/bash
if [ ! -f /var/tmp/denyip ]; then
    touch /var/tmp/denyip
fi

for deny in $(cat /var/log/rinetd.log | awk '{print $2}' | awk -F'.' '{print $1"."$2"."$3"."$4}' | sort | uniq -c | sort -r -n | head -n 200 | awk '{print $2}')
do
    grep -q $deny /var/tmp/denyip
    if [ $? -eq 1 ] ; then
        echo $deny >> /var/tmp/denyip
        iptables -I INPUT -p tcp --dport 443 -s $deny -j DROP
    fi
done
		

第二版腳本

#!/bin/bash

DPORT=443
TOP=30
ACCCESS_LOG=/var/log/rinetd.log
#TIMEPOINT='24/May/2012'
TIMEPOINT=$(date '+%d/%b/%Y:%H')
BLACKLIST=/var/tmp/black
WHITELIST=/var/tmp/white

if [ ! -f ${BLACKLIST} ]; then
    touch ${BLACKLIST}
fi

if [ ! -f ${WHITELIST} ]; then
    touch ${WHITELIST}
fi

for deny in $(grep ${TIMEPOINT} ${ACCCESS_LOG} | awk '{print $2}' | awk -F'.' '{print $1"."$2"."$3"."$4}' | sort | uniq -c | sort -r -n | head -n $TOP | awk '{print $2}')
do

    if [ $(grep -c $deny ${WHITELIST}) -ne 0 ]; then
        echo 'Allow IP:' $deny
		iptables -D INPUT -p tcp --dport $DPORT -s $deny -j DROP
		continue
    fi

    if [ $(grep -c $deny ${BLACKLIST}) -eq 0 ] ; then
		echo 'Deny IP:' $deny
        echo $deny >> ${BLACKLIST}
        iptables -I INPUT -p tcp --dport $DPORT -s $deny -j DROP
    fi
done