简介

如果我们的网站遭遇 CC 和 DDoS 攻击时,我们可以用这个方法来简单的防御。可以根据系统的负载状态通过CloudflareAPI实现自动开启5秒盾。如果我们的网站遭遇 CC 和 DDoS 攻击时,我们可以用这个方法来简单的防御。可以根据系统的负载状态通过CloudflareAPI实现自动开启5秒盾。

配置

脚本设置
项目地址:https://github.com/Machou/Cloudflare-Block

当服务器受到攻击时,系统负载就会爆增,利用脚本自动检测系统负载,当压力超过一定的值时就可以切换为” I’m Under Attack! “模式了。操作步骤如下:

#下载
cd /root && git clone https://github.com/Machou/Cloudflare-Block.git DDoS
#打开Cloudflare.sh,修改配置
API_KEY      You're Global API Key (https://dash.cloudflare.com/profile)
MAIL_ACCOUNT    Email of your Cloudflare account
DOMAIN      Zone ID (https://dash.cloudflare.com/_zone-id_/domain.com)
#设置定时任务
crontab -e
*/1 * * * * /root/DDoS/Cloudflare.sh 0 # check every 1 minute if protection is not enabled
*/20 * * * * /root/DDoS/Cloudflare.sh 1 # check every 20 minutes if prot
Shell

完整源代码,脚本默认的是检测系统负载为 10,启动” I’m Under Attack! “模式,你以根据需要来调整。脚本如下:

#!/bin/bash
 
 
    # $1 = 1min, $2 = 5min, $3 = 15min
    loadavg=$(cat /proc/loadavg|awk '{printf "%f", $1}')
 
 
    # load is 10, you can modify this if you want load more than 10
    maxload=10
 
 
    # Configuration API Cloudflare
    # You're Global API Key (https://dash.cloudflare.com/profile)
    api_key=
    # Email of your account Cloudflare
    email=
    # Zone ID (https://dash.cloudflare.com/_zone-id_/domain.com)
    zone_id=     
 
 
    # create file attacking if doesn't exist
    if [ ! -e $attacking ]; then
        echo 0 > $attacking
    fi
 
    attacking=./attacking
 
 
    hasattack=$(cat $attacking)
 
 
    if [ $(echo "$loadavg > $maxload"|bc) -eq 1 ]; then
 
        if [[ $hasattack = 0 && $1 = 0 ]]; then
 
            # Active protection
            echo 1 > $attacking
            curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/$zone_id/settings/security_level" \
                            -H "X-Auth-Email: $email" \
                            -H "X-Auth-Key: $api_key" \
                            -H "Content-Type: application/json" \
                            --data '{"value":"under_attack"}'
        fi
 
        else
            if [[ $hasattack = 1 && $1 = 1 ]]; then
 
            # Disable Protection
            echo 0 > $attacking
            curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/$zone_id/settings/security_level" \
                            -H "X-Auth-Email: $email" \
                            -H "X-Auth-Key: $api_key" \
                            -H "Content-Type: application/json" \
                            --data '{"value":"high"}'
        fi
    fi
 
    exit 0
Shell

宝塔面板计划任务
我们如果想省点事就直接复制上面第一条中的脚本代码,放在计划任务的 shell 脚本之中,也可以是同样的效果。

问题解决

1.bc: command not found

解决:

yum -y install bc

1./attacking 文件不存在
把脚本代码中 26 行的 attacking=./attacking 剪切到 20 行

Last modification:May 25th, 2020 at 12:45 am
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