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将ssh登录错误次数过多的ip加入黑名单
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#! /bin/bash | |
cat /var/log/secure|awk '/Failed/{print $(NF-3)}'|sort|uniq -c|awk '{print $2"="$1;}' > /usr/local/bin/black.list | |
for i in `cat /usr/local/bin/black.list` | |
do | |
IP=`echo $i |awk -F= '{print $1}'` | |
NUM=`echo $i|awk -F= '{print $2}'` | |
if [ ${#NUM} -gt 1 ]; then | |
grep $IP /etc/hosts.deny > /dev/null | |
if [ $? -gt 0 ];then | |
echo "sshd:$IP:deny" >> /etc/hosts.deny | |
fi | |
fi | |
done |
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允许的错误连接次数是10次, 在crontab里面添加
*/10 * * * * sh /usr/local/bin/autodeny.sh
可以每10分钟运行一次