我们进入以下文件
vim /usr/local/bin/denyhosts.sh
写入下面的内容:
#!/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
添加到定时任务:
crontab -e
添加定时任务:
*/2 * * * * /usr/local/bin/denyhosts.sh
执行启动:
/sbin/service crond start