Analysis on computer network security

With the rapid popularization of information technology, people gradually become dependent on networks. However, due to the vulnerability and complexity of network systems, network security threats will affect people's lives. Therefore, it is imperative to prevent and solve network security problems. Computer network security refers to the use of network management control and corresponding technical measures to provide data confidentiality integrity and usability protection in the network environment, but it involves many factors, which will be discussed below.
1. Major Factors Affecting computer network security 1) information network security technology lags behind the development of information network technology. Today, the rapid development of network technology, its products are quickly integrated into our lives, but the security of these new generation products continues with the security technology of the previous generation. This makes the computer network vulnerable to attacks when we use these products.
2) security of computer operating systems for some existing operating systems, such as UNIX, MSNT, and wIND0ws, all have network security vulnerabilities that are easily exploited by hackers, and then attack the system.
3) security of computer network physical hardware the problem of computer physical hardware mainly refers to the problem in the work of computer hardware, hard disks, optical cables, and local area networks are physically damaged due to various causes, resulting in computer network faults.
4) the security of Intranet users is combined with the actual situation. The security threats posed by internal users are far greater than those of external users. The main reason is that intranet users can ignore the firewall of the network system, once an operation fails, the firewall is powerless, which brings security risks.
5) Management Security Network security is a combination of technology and management, while network security is dynamic. In this regard, professional network management personnel are lacking, there is a lack of comprehensive and complete management systems.
Ii. Countermeasures for strengthening computer network security is closely related to the network system. To solve computer network security problems, we must seize the main aspects of network security to ensure its security.
1) Management Security Countermeasure management is the core issue of computers. People, as the subject of network system security, must first develop a sound network management system to ensure that the network security solution can be implemented. In addition, security knowledge and awareness training for personnel should be strengthened, network operations and system maintenance regulations should be formulated, emergency measures should be established, and automatic management should be strengthened.
2) Computer System Security countermeasures system vulnerabilities give viruses a chance. Today's rapid development of the network and the spread of viruses are also diversified, while ensuring the safe operation of computers, in addition to enhancing the awareness of virus protection, we must actually strengthen the protection of viruses. In general, the system prevention work includes: Users should never trust any email with fraudulent or tempting language; install some virus prevention and removal tools that are easy to infect; and obtain virus knowledge in a timely manner, strengthen the observation of computer exceptions to prevent virus transmission. For this type of virus that may cause large losses, it is best for users to back up the system.
3) physical protection measures of computer entities for computer network security systems, computer hardware, communication lines, and other physical devices are also the main protection objects. In general, technicians can use electromagnetic shielding technology to prevent electromagnetic leakage, and then add lightning protection facilities to prevent the interference of lightning and industrial electricity on the network system, also pay attention to fire prevention, dust prevention, shockproof, anti-static and other measures to ensure the normal operation of computer system equipment.
4) Network Control Countermeasure network control strategy is the main protection means for network security prevention and protection.
Set access permissions for the network. Network access permissions are mainly used to address the common application security threats caused by illegal network operations of computer knowledge in statistics. Its main task is to prevent unauthorized use and access to network resources. The general practice is to strengthen inbound control, such as user name identification and verification, password identification and account restriction check during user logon. In addition, user and user group permissions are defined, such as specifying which resources, directories, and files can be accessed.
Strengthen Network Firewall control. Firewall technology can basically solve network layer security issues. The main mechanism of firewall technology is to isolate the Intranet and the network, establish a communication monitoring system on the network border, and then define an access scale between the two networks, to determine the security of some network access. Currently, firewall technologies mainly include the following:
Filter Firewall: filters out external network intrusions through routers. proxy firewall: A proxy firewall consists of a proxy server and a filter router, in combination with the software proxy technology, a certain amount of information filtering data is established to allow data that meets the filtering rules to pass. Otherwise, the data is not allowed to pass, and then the router and network connection are filtered, send the filtered data to the proxy server. firewall technology can provide network security, but it cannot absolutely ensure network security. It may also be attacked by viruses, you cannot rely solely on firewalls to solve network security problems. You should try your best to combine the design and implementation of the Windows Mobile platform network firewall with the firewall technology to achieve network security in other aspects.
The above mainly describes that the network security solution is to comprehensively manage and protect the software and hardware of computer networks in real time, and control network permissions and firewalls on key network layer issues, then the data encryption technology is applied to achieve network security.
However, there is no absolutely secure network system. With the development of science and technology, network security problems will become increasingly serious,