一.查看攻击者ip
#netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
二.安装ddos deflate
#wget http://www.inetbase.com/scripts/ddos/install.sh //下载DDoS deflate #chmod 0700 install.sh //添加权限 #./install.sh //执行
三.配置DDoS deflate
下面是DDoS deflate的默认配置位于/usr/local/ddos/ddos.conf ，内容如下：
##### Paths of the script and other files PROGDIR="/usr/local/ddos" PROG="/usr/local/ddos/ddos.sh" IGNORE_IP_LIST="/usr/local/ddos/ignore.ip.list" //IP地址白名单 CRON="/etc/cron.d/ddos.cron" //定时执行程序 APF="/etc/apf/apf" IPT="/sbin/iptables" ##### frequency in minutes for running the script ##### Caution: Every time this setting is changed, run the script with --cron ##### option so that the new frequency takes effect FREQ=1 //检查时间间隔，默认1分钟 ##### How many connections define a bad IP? Indicate that below. NO_OF_CONNECTIONS=150 //最大连接数，超过这个数IP就会被屏蔽，一般默认即可 ##### APF_BAN=1 (Make sure your APF version is atleast 0.96) ##### APF_BAN=0 (Uses iptables for banning ips instead of APF) APF_BAN=1 //使用APF还是iptables。推荐使用iptables,将APF_BAN的值改为0即可。 ##### KILL=0 (Bad IPs are'nt banned, good for interactive execution of script) ##### KILL=1 (Recommended setting) KILL=1 //是否屏蔽IP，默认即可 ##### An email is sent to the following address when an IP is banned. ##### Blank would suppress sending of mails EMAIL_TO="root" //当IP被屏蔽时给指定邮箱发送邮件，推荐使用，换成自己的邮箱即可 ##### Number of seconds the banned ip should remain in blacklist. BAN_PERIOD=600 //禁用IP时间，默认600秒，可根据情况调整
用户可根据给默认配置文件加上的注释提示内容，修改配置文件。
查看/usr/local/ddos/ddos.sh文件的第117行
netstat -ntu | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort -nr > $BAD_IP_LIST
修改为以下代码即可
netstat -ntu | awk ‘{print $5}’ | cut -d: -f1 | sed -n ‘/[0-9]/p’ | sort | uniq -c | sort -nr > $BAD_IP_LIST