firewall

利用Socket的传输层服务SPI通信的木马，对于穿防火墙有一定的研究价值(Use Socket transport layer services SPI communication Trojan, firewall, for wearing a certain research value)

pysl-iPhone电话短信防火墙，精选ios编程学习源码，很好的参考资料。(Pysl-iPhone phone SMS firewall, selection of learning IOS programming source code, a good reference.)

Syn_ScanPort0 高速SYN端口扫描器的VC源代码(SYN port Syn_ScanPort0 high-speed scanner VC source code)

pysl-iPhone电话短信防火墙，精选ios编程学习源码，很好的参考资料。(Pysl-iPhone phone SMS firewall, selection of learning IOS programming source code, a good reference.)

说明：  费尔防火墙源代码.费尔个人防火墙 2.1 源程序包括 XFILTER.EXE, XFILTER.DLL, XPACKET.VXD ( 限于95/98/ME版 ) , XAPCKET.SYS ( 限于 2000/XP 版 )的源程序。此代码包中没有包含编译后的程序，要获得这些程序可以通过下载安装包得到。安装包是免费的，使用 ZIP 兼容的压缩方式，用 ZIP 工具解压。(请尊重代码作者的劳动，只供学习，勿用于商业用途。站长留)(Fil firewall source code. Fil Personal Firewall 2.1 include XFILTER.EXE source, XFILTER.DLL, XPACKET.VXD (95/98/ME limited edition), XAPCKET.SYS (only 2000/XP version) of the source. This code does not contain the compiled procedures to obtain these procedures can be downloaded installation package. Installation kits are free, the use of ZIP-compatible compression, decompression using ZIP tools.)

一个驱动级的防火墙源程序，基于ndis hook，可以设定外部设定过滤规则，(A drive source firewall level, based on ndis hook, set the filter can be set to external rules,)

LINUX内核源码，用于配的LIDS安装linux入侵防御系统(LINUX kernel source, for distribution the LIDS to install linux Intrusion Prevention System)

这是一个防火墙源代码程序，供参考，里面的内容还不错(This is a firewall source code of procedures for reference, the content of which is not bad)

说明：  【转载】防火墙源码，实现基本的入侵检测功能实例(Reprinted】 【firewall source code, to achieve the basic function of an instance of intrusion detection)

什么是防火墙？防火墙就是一种过滤塞（目前你这么理解不算错），你可以让你喜欢的东西通过这个塞子，别的玩意都统统过滤掉。在网络的世界里，要由防火墙过滤的就是承载通信数据的通信包。(failed to translate)