经典的世界第一个蠕虫程序，Morris的源代码。用C来编写，linux下编译。可用于学习研究。-classic in the world a worm program, Morris source. C to prepare, compile under Linux. Can be used to study.

防火墙源码或其他好源码或编程学习资料，有些不完整在linux下运行-simple firewall

modsecurity是linux环境下非常优秀的开源防御web攻击软件，它可以防御针对apache的攻击，使用规则匹配，它的解码流程和匹配流程是很值得学习和借鉴-modsecurity is an excellent open-source Linux environment defense web attack software, it can defense the apache attack using rules match, the decoding process and the

iptables指南，对于学习linux下防火墙设置有很大帮助。-iptables guidelines set for the next learning linux firewall helps a lot.