12345678910111213141516171819 1 1 * * * sh /root/bin/Denyhosts.sh #!/bin/bash #Denyhosts SHELL SCRIPT #2013-6-24 cat /var/log/secure|awk '/Failed/{print $(NF-3)}'|sort|uniq
-c|awk '{print $2"=" $1;}' >/root/bin/Denyhosts.txt DEFINE="10"for i in `cat
/root/bin/Denyhosts.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
fidone
