服务器防止SSH暴力破解

add-ip-to-black-list.sh

#! /bin/bash
cat /var/log/secure|awk '/Failed/{print $(NF-3)}'|sort|uniq -c|awk '{print $2"="$1;}' > /usr/local/bin/black.txt
for i in `cat  /usr/local/bin/black.txt`
do
  IP=`echo $i |awk -F= '{print $1}'`
  NUM=`echo $i|awk -F= '{print $2}'`
   if [ $NUM -gt 5 ];then
      grep $IP /etc/hosts.deny > /dev/null
    if [ $? -gt 0 ];then
      echo "sshd:$IP:deny" >> /etc/hosts.deny
    fi
  fi
done

corntab -e

*/1 * * * * sh  /opt/secure_ssh.sh

参考链接

• 服务器防止SSH暴力破解_ssh:notty-CSDN博客
• Linux服务器总是被猜测密码怎么办？这个脚本帮你简单加固 - 知乎