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

网络安全方面较为详细的资料，包括数据加密，数据认证，网络安全工程等。-Network security is more detailed information, including data encryption, data authentication, network security engineering.