nginx黑名单和django限速,最简单的防恶意请求方法

django项目遭遇cc攻击,不要惊慌,这里推荐两招简单实用的技巧。

项目Nginx作为http接入层,分发到django应用,启动10个uwsgi worker。

今日突然发现,网页打开卡顿,打开server一看,cpu100%。

nginx黑名单和django限速,最简单的防恶意请求方法_第1张图片

 

打开uwsgi的log,发现某一个IP进行了大量的请求,占用了worker。

这里总结下两种解决方法:

1.设置nginx黑名单

vi blockip.conf创建文件,输入:

deny x.x.x.x; 

编辑nginx.conf, 在http{}内添加:

include blockip.conf;

验证配置:

[root@server nginx]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

重启nginx:

nginx -s reload

2.django内添加middleware

RequestBlockingMiddleware.py

import time
from django.core.exceptions import PermissionDenied

from django.utils.deprecation import MiddlewareMixin
MAX_REQUEST_PER_SECOND=2 #每秒访问次数
class RequestBlockingMiddleware(MiddlewareMixin):
    def process_request(self,request):
         now=time.time()
         request_queue = request.session.get('request_queue',[])
         if len(request_queue) < MAX_REQUEST_PER_SECOND:
             request_queue.append(now)
             request.session['request_queue']=request_queue
         else:
             time0=request_queue[0]
         if (now-time0)<1:
             raise PermissionDenied('Forbidden user agent')
         request_queue.append(time.time())
         request.session['request_queue']=request_queue[1:]

setting.py中注册:

MIDDLEWARE = [
 'django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'common.middleware.RequestBlockingMiddleware', #在sessions之后,auth之前
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

不足100行代码,log里再也没有对方的IP出现,相信对方正在某个小黑屋的电脑前气得跺脚吧

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