Linux(Centos)防DDOS攻击软件-DDoS-Deflate(转)

转自：

(D)DoS-Deflate是一款免费的用来防御和减轻DDoS攻击。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安装及配置

1、安装

wget 
chmod 0700 install.sh
./install.sh

2、配置

配置文件是 /usr/local/ddos/ddos.conf ，默认有如下配置

FREQ=1
NO_OF_CONNECTIONS=150
APF_BAN=1
KILL=1
EMAIL_TO=”root”
BAN_PERIOD=600

IP地址白名单：/usr/local/ddos/ignore.ip.list
卸载

wget 
chmod 0700 uninstall.ddos
./uninstall.ddos

MediaLayer was in need of a script to automatically mitigate (D)DoS attacks. The necessity started when MediaLayer was the target of a rather large, consistent attack originating from multiple IP addresses. Each IP would have a large amount of connections to the server, as shown as by:

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