Based TCP/IP And Dynamic Reasearch For Computer Network Security

With the increase of using TCP/IP network in general, how to protect network security and share resources is becoming an important research topic in computer science.The article to address main computer (server) security issues, in detail the current network security requirements, threats, protection technology, operating system security, application security basis,and study popular PPDR safety model in the world, mainly from the network server in the network security protocol,offer main security defense system dynamics perspective, provides for a variety of defense technology advantages, mutual bridge gaps and work together to maintain main computer security. At the same time research and development of main dynamic security defense system Internet layer and Transport layer of TCP/IP agreement on the network monitor system, To easily the agreement correlation field and the field combination which is used by the network attack has carried on the real-time monitoring and the current capacity track, this network monitor system characteristic is obtains the most primitive network data packet from network interface layer (the agreement stack most underlying layer), is the use normal agreement value training check match database, flows circulates after Internet layer and Transport layer byte flows has carried on the comparison with the check match database to judge whether had the unusual situation, regarding unusual situation processing is use forge data packet technology and so on implementation cut-off, reverse attack. The last achieve the control system functional modules.This article in Windows Server 2000 environments using JDK1.5,SQL Server2000,NDIS,WinPcap,Jpcap the main part of the network monitoring system of code modules for experiments.