Technology overview of the most popular enterprise

Technology overview of enterprise network security system

in today's networked world, computer information and resources are vulnerable to various attacks. On the one hand, it comes from the Internet. While the Internet brings mature application technology to enterprises, it also brings inherent security problems to enterprises; On the other hand, it comes from within the enterprise, because it is the internal network of the enterprise, which is mainly aimed at the internal personnel and internal information resources of the enterprise. Therefore, the enterprise also faces its own unique security problems. The openness and sharing of the network not only facilitate people's use, but also make the network vulnerable to attacks, and the consequences of attacks are serious, such as data being stolen, the server can not provide services, and so on. With the rapid development of information technology, more and more attention has been paid to network security technology, which has promoted the rapid development of firewall, intrusion detection, virtual private, access control and other network security technologies and nano reinforced plastics

enterprise network security is the security of the system structure itself, so we must use structured views and methods to treat enterprise security systems. The enterprise security assurance system is divided into four levels, from high to low, which are enterprise security strategy level, enterprise user level, enterprise network and information resource level, and security service level. Establish a multi-level security technology prevention system according to these levels. Common enterprise security technologies are as follows

first, VLAN (virtual local area) technology

selecting VLAN technology can better implement network security from the link layer. VLAN refers to the establishment of a logical network on the basis of the physical topology of the network through the switching device. It depends on the logical setting of the user to divide a local area that is physically interconnected into multiple virtual sub areas. The division can be based on the port to which the device is connected, the MAC address of the user node, etc. This technology can effectively control network traffic and prevent broadcast storms. It can also use the packet filtering technology of MAC layer to implement MAC frame filtering for VLAN ports with high security requirements. Moreover, even if hackers break through a virtual sub, they cannot get the information of the whole network

second, network segmentation

most enterprises use Ethernet based on broadcasting. The communication packets between any two nodes can be intercepted by the card of any node on the same Ethernet. Therefore, as long as hackers connect to any node on the Ethernet to listen, they can capture all data packets that occur on the Ethernet, unpack and analyze them, and steal key information. Network segmentation is to isolate illegal users from network resources, so as to limit users' illegal access

Third, hardware firewall technology

a major part of any enterprise security strategy is to implement and maintain the firewall, so the firewall plays an important role in the implementation of network security. Firewalls are usually located at the edge of the enterprise network, which makes the internal network isolated from the Internet or other external networks, and restricts network mutual access to protect the internal network of the enterprise. The purpose of setting up firewalls is that the production capacity is more than 7 times the demand. In order to set up a unique channel between the internal and external, and simplify the security management of the network

IV. intrusion detection technology

there are many intrusion detection methods, such as intrusion detection methods based on expert system, intrusion detection methods based on neural network, etc. At present, some intrusion detection systems have been implemented in application layer intrusion detection

v. virus detection technology

you can install virus filtering software on firewalls, proxy servers or network servers, or install network anti-virus software on enterprise local areas to check and remove viruses

VI. encryption technology

the encryption technology of network data can be divided into three categories, namely symmetric encryption, asymmetric encryption and irreversible encryption. Among them, irreversible encryption algorithm does not have the problem of key storage and distribution, and is suitable for distributed network systems, but its encryption algorithm is quite considerable, so it is usually used in the case of limited data. The password in the computer system of the new material industry system with Shandong characteristics is encrypted by irreversible encryption algorithm. In recent years, with the continuous improvement of computer system performance, the application of irreversible encryption algorithm is gradually increasing

VII. VPN (virtual private) technology

the core of VPN technology is to use tunnel technology to encrypt and package the data in the internal network, and then transmit it through the virtual single device range to the proposed public tunnel of kiloton/year, so as to prevent the theft of sensitive data. VPN can be established on the Internet, service provider's IP, frame relay or ATM. Network users can establish VPN through the Internet and other public services, just as through their own private establishment, enjoying high security, priority, reliability and manageability, while its construction cycle, investment and maintenance costs are greatly reduced. At the same time, it also provides safe contacts for remote users and mobile users

VIII. System backup and recovery technology

preventive measures cannot be designed in every aspect, and unexpected events will bring unpredictable disasters to the computer system. Therefore, the backup and recovery of the system must be established to ensure the normal operation of the computer system after the disaster. There are many types of backup schemes, and the ultimate goal is to ensure the continuous operation of the system. Among them, network communication, host system and business data are indispensable links to ensure the continuous operation of the system. When selecting the backup scheme, we should focus on the backup of data. The daily backup system is the specific implementation rules of the system backup plan. After formulation, daily backup should be carried out in strict accordance with the system, otherwise the goal of the backup plan will not be achieved. System backup not only backs up the data in the system, but also backs up the application program, database system, user settings, system parameters and other information installed in the system. (end)