Park Multi-layer Network Security System Design And Arp Monitoring, Prevention And Control

As we know, the security of network is straightly related to the safety and stability of the economy, the military and even the politics of a country. But it's just about 20% of the issues come from internet, the rest 80% of them come from the local area network , such as campus networks, internal networks of enterprises and the extranet of governments etc. Added to this are the facts that the problems of local area networks are usually complex, hard to confirm and they have a lack of protective measures. And most of them can only be dealt with temporarily by difficult and not very effective ways. So an effective solution for the safety of local area network is essential.The target of this paper is to build a multi-level and multi-directional local area network security management system. It references a lot of the experiences we already have, combined what we know about the demands of local area network securities, and based on ARP agreement principle, the features of abnormal ARP packets, Network sniffer technology principle and realization, SNMP technology works and the detection of abnormal behavior of network devices, NDIS driver technology, the underlying principles and implementation of security protection, network authentication system theory and control functions, e-mail sent to specific realization of the principle and other key technology. Upon all these, the system could make the network administrator secure the running of local area network in time.This paper formed a set of active and effective feedback mechanism by building the security monitoring system, which is based on a user's computer, a two-tier network, a three-tier network, and network equipment, with network access system certification and mails systems etc. Then finally to design and implement a multi-level network security management system with five parts, common user client, management client, equipment testing server, summary of log server and summary server monitoring. The integrated control, full deployment and standing local area network security system could meet the network administrator's demands, and guarantee the safety of the users of local area network.