将频繁发起访问的ip添加到拒绝访问文件


#!/bin/bash

cat /var/log/secure | awk '/Failed/{print $(NF-3)}' | sort|uniq -c | awk '{print $2"="$1;}' > /data/secure.ssh/sshd.txt

DEFINE="3"

for i in `cat /data/secure.ssh/sshd.txt`

do

IP=`echo $i | awk -F= '{print $1}'`
NUM=`echo $i | awk -F= '{print $2}'`


#if [ "$NUM" -gt "$DEFINE" ];then

if [[ $NUM -gt $DEFINE ]];then

grep $IP /etc/hosts.deny > /dev/null
if [ $? -gt 0 ];then
echo "sshd:$IP" >> /etc/hosts.deny
fi

fi

done


每30分钟执行一次

*/30 * * * * sh /data/secure.ssh/ssh.sh