linux屏蔽频繁访问ip
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