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/?
如何确认是否受到DDOS攻击??
执行:?
netstat?-ntu? ?awk?'{print?$5}'? ?cut?-d:?-f1? ?sort? ?uniq?-c? ?sort?-n?
执行后,将会显示服务器上所有的每个IP多少个连接数。?
以下是我自己用VPS测试的结果:?
li88-99:~#?netstat?-ntu? ?awk?'{print?$5}'? ?cut?-d:?-f1? ?sort? ?uniq?-c? ?sort?-n?
1?114.226.9.132?
1?174.129.237.157?
1?58.60.118.142?
1?Address?
1?servers)?
2?118.26.131.78?
3?123.125.1.202?
3?220.248.43.119?
4?117.36.231.253?
4?119.162.46.124?
6?219.140.232.128?
8?220.181.61.31?
2311?67.215.242.196?
每个IP几个、十几个或几十个连接数都还算比较正常,如果像上面成百上千肯定就不正常了。?
1、安装DDoS?deflate?
wget?http://www.inetbase.com/scripts/ddos/install.sh?//下载DDoS?deflate?
chmod?0700?install.sh?//添加权限?
./install.sh?//执行?
2、配置DDoS?deflate?
下面是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?
#####?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?
用户可根据给默认配置文件加上的注释提示内容,修改配置文件。?
喜欢折腾的可以用Web压力测试软件测试一下效果,相信DDoS?deflate还是能给你的VPS或服务器抵御一部分DDOS攻击,给你的网站更多的?;ぁ?/p>
转载于:https://www.cnblogs.com/buffer/archive/2011/03/23/1993195.html
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