防爆力ssh脚本

 #!/bin/bash

cat /var/log/secure|awk '/Failed/{print $(NF-3)}'|sort|uniq -c|awk '{print $2"="$1;}' > /root/satools/black.txt

DEFINE="4"

for i in `cat /root/satools/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