#!/bin/bash
#Denyhosts SHELL SCRIPT
#2013-6-24
cat /var/log/secure|awk '/Failed/{print $(NF-3)}'|sort|uniq -c|awk '{print $2"=" $1;}' >/usr/local/bin/Denyhosts.txt
DEFINE="10"
for i in `cat /usr/local/bin/Denyhosts.txt`
do
IP=`echo $i|awk -F= '{print $1}'`
NUM=`echo $i|awk -F= '{print $2}'`
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

添加到定時任務(wù)
crontab -e
添加定時任務(wù)
*/2 * * * * /usr/local/bin/denyhosts.sh

執(zhí)行啟動
/sbin/service crond start