The Study Of The Defence For The Security Of The Network In PanGang Automation Company

People all over the world pay much attention to the research on the security of the network. It is up to 600 manufactories on network security in USA. And the security of the network has become an important part of the Internet/Intranet/Extranet network industry. In China, the security of network is also regarded, and the researchers get good effect on anti-virus, but they can seldom break through on vicious attack. There are less than 70 manufactories and instruments on security of network and the network industry have not come into great scale and system in China recently.In this paper, the author analyzed the network in automation department of PanZhiHua iron & steel company (PanGang Automation company). The network in PanGang Automation company is LAN, also is typical enterprise network. The vicious attack and misuse network occurred frequently because of the weakness of the security of network. So establish a set of security measure become urgent. Besides, the author researched on the privacy and security of the manage information, the right of users of network, the need to prevent from the virus and the menace to the network security in PanGang Automation company. This paper expatiated the structure of the network system based on OSI/RM. OSI/RM classify the structure of the network into application layer, presentation layer, session layer, transport layer, network layer, data link layer and physical layer. There are correspond protocols in every layer, and the network protocols come into being according to OSI/RM. We can classify the network on other different standard. For example, we can classify the network into peer-to-peer network, network based on server and enterprise network according to the different protocol, transmission media and network server. And we also can classify the network into LAN and WAN according to the different region. According to the basic theory about the network security, combined with OSI/RM, this paper lays emphasis on the resea}rch which contains the leak of network, the technique and means of the attack from network, and finding some security leaks existing in the basic technique and application behind the network. So, a lot of security problems inevitably come up. For example, the attack from the network is the main threat of security, while the network attack uses all kinds of technique and means with the purpose of using the leak of the system. Based on this, this paper provides a security strategy related on network, and gives the security measures for the network in PanGang Automation company, they are management measure, organization VLAN, data backup, limiting authority of access, the self-protection of legal user, prevention and cure of virus, and the emergency process plan. In these fields, we obtain much practical effect. Because of complexity of security on network, the research about the protective measures is a permanent and complex task, we have a lot of research to do, this task will continue to be discussing in the future.