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DDoSdeflate-Linux下防御/减轻DDOS攻击

作者:互联网

前言

互联网如同现实社会一样充满钩心斗角,网站被DDOS也成为站长最头疼的事。在没有硬防的情况下,寻找软件代替是最直接的方法,比如用iptables,但是iptables不能在自动屏蔽,只能手动屏蔽。今天要说的就是一款能够自动屏蔽DDOS攻击者IP的软件:DDoS deflate。

DDoS deflate介绍

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.

DDoS deflate官方网站:http://deflate.medialayer.com/

DDoS deflate其实非常简单,下面是详细的安装和配置步骤:

1.安装 DDoS deflate

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

chmod 0700 install.sh

./install.sh

//弹出版权信息后,在SSH下键入 q , 即可退出版权信息。

2.配置 DDoS deflate .

安装成功后会提示Config file is at /usr/local/ddos/ddos.conf,所以你可以在ddos.conf里进行简要配置.

vim /usr/local/ddos/ddos.conf

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” //白名单

CRON=”/etc/cron.d/ddos.cron”

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

//ddos.sh执行的频率,单位是分钟,搭配crontab来执行.

如果你更改了该设置,请执行 /usr/local/ddos/ddos.sh –cron

—————————————————————————-

How many connections define a bad IP? Indicate that below.

NO_OF_CONNECTIONS=150

//当哪个IP的连接数达到150就加入黑名单;查看连接数你可以执行

#netstat -ntu | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort -n

—————————————————————————-

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=0

//一般情况下你是使用iptables来做防火墙,所以这里你需要将 APF_BAN的值改为0.

—————————————————————————-

KILL=0 (Bad IPs are’nt banned, good for interactive execution of script)
KILL=1 (Recommended setting)

KILL=1

//将非法的的IP加入iptables的INPUT链中,DROP之.

—————————————————————————-

An email is sent to the following address when an IP is banned.
Blank would suppress sending of mails

EMAIL_TO=”root”

//给root发一封邮件

—————————————————————————-

Number of seconds the banned ip should remain in blacklist.

BAN_PERIOD=600

//关押黑名单中的IP的时长

3.卸载 DDoS deflate ,如果你不想用.

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

chmod 0700 uninstall.ddos

./uninstall.ddos

另外如果总是会收到以下类似的邮件提示的话

Banned the following ip addresses on Tue Aug 5 01:32:01 BST 2008

1120 with 1120 connections

请查看/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

本文转自 ID: 互联网老辛 更多内容关注公众号《极客运维之家》,扫码添加:

标签:IP,DDOS,deflate,DDoS,DDoSdeflate,usr,Linux,APF,ddos
来源: https://blog.csdn.net/qq_42499737/article/details/118811843