拒绝ssh密码暴力破解shell
#!/bin/bash
cat /var/log/auth.log|awk ‘/Failed/{print $(NF-3)}’|sort|uniq -c|awk ‘{print $2"="$1;}’ > /root/black.txt
TRYCOUNT="3"
for i in `cat /root/black.txt`
do
IP=`echo $i |awk -F= ‘{print $1}’`
NUM=`echo $i|awk -F= ‘{print $2}’`
if [ $NUM -gt $TRYCOUNT ];
then
grep $IP /etc/hosts.deny > /dev/null
if [ $? -gt 0 ];
then
echo "sshd:$IP" >> /etc/hosts.deny
fi
fi
done