Server Shield是一个轻量级的linux服务器安全加固软件。它安装简单、稳定，能够直接有效的使你的服务器抵御黑客攻击。

特性

Firewall Hardening
TCP Hardening
Data Leakage Protection
ICMP/Ping Flood Protection
Rootkit Protection
DoS Protection
Spoof Protection
Bogus TCP Protection
SYN Flood Protection
Requires
iptables ("yum install iptables")

git clone https://github.com/Brian-Holt/server-shield
cd server-shield;chmod +x sshield;mv sshield /etc/init.d
/etc/init.d/sshield start 

下载地址