1：安装服务
yum install -y net-tools httpd -y
2：搭建基本环境
systemctl stop firewalld
systemctl start httpd
echo "hello world" >> /var/www/html/index.html
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c
| sort -n
3：模拟攻击
ab -n 1000 -c http://192.168.128.100/index.html
查看数据
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
4：安装DDoS deflate
wget http://www.inetbase.com/scripts/ddos/install.sh #下载安装脚本
chmod a+x install.sh #添加执行权限
./install.sh #执行脚本
出现下面的界面就安装完成了，按q退出
5：配置文件介绍
vim /usr/local/ddos/ddos.conf
内容详细介绍
##### Paths of the script and other files
PROGDIR="/usr/local/ddos"
PROG="/usr/local/ddos/ddos.sh" #脚本
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 #自动检查时间间隔，单位分钟
##### How many connections define a bad IP? Indicate that below.
NO_OF_CONNECTIONS=150 #最大连接数，超过自动屏蔽IP
##### 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
##### KILL=0 (Bad IPs are'nt banned, good for interactive execution of script)
##### KILL=1 (Recommended setting)
KILL=1
##### An email is sent to the following address when an IP is banned.
##### Blank would suppress sending of mails
EMAIL_TO="root" #有ip被屏蔽时，自动发告警邮件
##### Number of seconds the banned ip should remain in blacklist.
BAN_PERIOD=600 #禁用ip时间，默认600秒
安装后，不需要手动启动，它创建了crontab计划，每1分钟自动启动
6：查看被禁止的ip名单
iptables -L -n
7：服务操作
手动禁止 ip
iptables -A INPUT -s 192.168.100.202 -j DROP
查看禁止 ip
iptables -nvL
解除禁止 ip
iptables -D INPUT -s 192.168.100.202 -j DROP
7:卸载DDoS deflate服务
wget http://www.inetbase.com/scripts/ddos/uninstall.ddos
chmod a+x uninstall.ddos
./uninstall.ddos