DDoS deflate是一款免费的用来防御和减轻DDoS攻击的脚本。它通过netstat监测跟踪创建大量网络连接的IP地址，在检测到某个结点超过预设的限 制时，该程序会通过APF或IPTABLES禁止或阻挡这些IP.

官网：http://deflate.medialayer.com/

1、安装DDoS deflate

shell>wget http://www.inetbase.com/scripts/ddos/install.sh 

shell>chmod 0700 install.sh

shell>./install.sh

2、配置DDoS deflate

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

3、卸载DDoS deflate

shell>wget http://www.inetbase.com/scripts/ddos/uninstall.ddos

shell>chmod 0700 uninstall.ddos

shell>./uninstall.ddos

4、白名单设置

有时候默认的白名单经常有失误，为了避免这个情况，我们可以手工设置白名单的ip，然后强制不允许修改

vi /usr/local/ddos/ignore.ip.list //手工设置白名单IP

chattr +i /usr/local/ddos/ignore.ip.list  //强制不允许修改

chattr -i /usr/local/ddos/ignore.ip.list  //解除不允许修改

转载于:https://www.cnblogs.com/nicholas_f/archive/2012/01/18/2325677.html

    有服务器需求请加QQ1911624872咨询