#!/bin/bash
#Denyhosts SHELL SCRIPT
#Mon Jun 23 11:37:25 CST 2014
self=$(cd “$(dirname “$0″)”; pwd)
cat /var/log/secure|awk ‘/Failed/{print $(NF-3)}’|sort|uniq -c|awk ‘{print $2″=”$1;}’ > ${self}/black.txt
DEFINE=”10″
for i in `cat ${self}/black.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

注释:self=$(cd “$(dirname “$0″)”; pwd) 获取脚本所在目录,为使得创建的black.txt文件与脚本文件在同一目录