一个ICMP数据包通过一个小的通信工具的实现，这是…

费尔个人防火墙 2.1 源程序 供大家学习 和参考-Fairbanks Personal Firewall 2.1 source code for the U.S. to study and reference

这个是华为开发的IVPN平台文档，主要应用于联通，移动等电信行业的虚拟网。-This is IVPN platform developed by Huawei documents, mainly used in China Unicom, mobile virtual network such as the telecommunications industry.

该程序是实现一个小型的防火墙的设计。是基于包过滤技术的实现。-the program is a small firewall design. Is based on packet filtering technology.

一个IP数据包过滤工具库源码，含有一个IPMonitor程序，可以查看所有IP包头信息。对编写包过滤防火墙很有用- A IP data packet filters the tool room source code, includes a IPMonitor procedure, may examine all IP Baotou information. To compiles the package to filter the firewall to be very useful

ipchains 防火墙分析-ipchains firewall analysis

简易防火墙程序. 简易防火墙程序.-Simple firewall program. Simple firewall program.

在Linux系统环境下进行包过滤的工具。可以根据不同的需要设置包过滤的规则。-in Linux environment for packet filtering tools. According to the need for different packet filtering rules.

监听与隐藏一书各章节的源代码。我将上传于此，对研究防火墙与网络通讯的朋友，或许有用。-eavesdropping with a hidden in the various sections of the source code. I will upload Here, the study of firewalls and network communications are friends, perhaps useful.

libdnet provides a simplified interface to several low-level networking routines, including network address manipulation, kernel arp(4) and route(4) table manipulation, firewalling, interface configuration, and raw Ethernet and IP datagram transmission.-libdnet provides a simplified interface to several low-level networking routines, including network address manipulation, kernel arp (4) and route (4) table manipulation, firewalling, interface configuration, and raw Ethernet and IP datagram transmission.

jxta提供了你需要的技术来编写网络化的，互操作的P2P应用程序，可以容易地跨防火墙来动态发现网络上其它的对等成员，容易地跨网络和任何人共享文件，在你喜爱的站点发现每分钟更新的内容，创建一个对等成员组，成员可以容易地发现对方（在任何跨防火墙的设备上），远程监视成员的活动，在网络上和其它成员安全地通信。-jxta you need to provide the technology to prepare the network, peer-to-peer interoperability of applications, can easily cross-firewall to dynamically discover other network members such as the right, easily inter-network and any shared document, in your favorite site updates every minute found the content, the creation of a reciprocal membership, Members can easily find each other (in any cross-firewall equipment), the members of the long-range surveillance activities, on the Internet and other communications to the security of the members.