Enterprise network security solution paper 1 overall network security solution for small and medium-sized enterprises
Abstract: With the increasing scale of enterprise internal network and more and more contacts with external network, a safe and credible enterprise network security system is very important. LAN enterprise information security system is a management system established to prevent the leakage of enterprise computer data information, aiming at providing a practical and reliable management scheme for LAN information security.
Keywords: network security anti-virus firewall intrusion detection
First, the meaning of network security
Network security is essentially information security on the network. It involves a wide range of fields. This is because there are various security vulnerabilities and threats in the current public communication network. Broadly speaking, all technologies and theories related to the confidentiality, integrity, availability, authenticity and controllability of information on the network are the areas to be studied in network security. Network security is usually defined as that the hardware and software of the network system and the data in the system are protected from being destroyed, changed or leaked by accidents or malicious reasons, the system runs continuously and reliably, and the network service is uninterrupted.
Second, the basic design principles of SME network security solutions
(1) The principle of comprehensiveness and integrity. This paper analyzes the network security and concrete measures by using the viewpoint and method of system engineering. Safeguard measures mainly include: administrative and legal means, various management systems (personnel audit, workflow, maintenance and guarantee systems, etc. ) and professional measures (identification technology, access control, password, low radiation, fault tolerance, anti-virus, using high-security products, etc. Good safety measures are usually the result of applying various methods. Computer network, including individuals, devices, software, data, etc. The status and influence of these links in the network can only be viewed and analyzed from the perspective of system integration, and effective and feasible measures can be obtained. That is, computer network security should follow the principle of overall security, and formulate a reasonable network security architecture according to the prescribed security strategy.
(2) The principle of balancing demand, risk and cost. For any network, absolute security is difficult to achieve and not necessarily necessary. Study the actual quantity of a network (including task, performance, structure, reliability and maintainability, etc. ), and make qualitative and quantitative analysis of the threats and possible risks faced by the network, and then formulate norms and measures to determine the security strategy of the system.
(3) The principle of step-by-step implementation. With the extensive expansion of network system and its application, with the expansion of network scale and the increase of application, network vulnerability will continue to increase. It is unrealistic to solve the network security problem once and for all. At the same time, the implementation of information security measures requires considerable expenditure. Therefore, if it is implemented step by step, it can meet the basic needs of network system and information security and save money.
Thirdly, the specific design of network security scheme for small and medium-sized enterprises.
Network security is a dynamic and integrated system engineering. Technically speaking, network security consists of several security components, such as secure operating system, application system, antivirus, firewall, intrusion detection, network monitoring, information audit, communication encryption, disaster recovery, security scanning and so on. A single component cannot ensure the security of the information network.
The scheme mainly includes the following aspects:
(1) Anti-virus: Apply anti-virus technology to establish a comprehensive network anti-virus system. With the continuous development of the Internet, information technology has become a great driving force to promote economic development and social progress: highly computerized information resources have become extremely valuable to anyone at any time and any place in today's society. No matter the information stored in workstations, servers or circulating on the Internet, it has become a key strategic point related to the success or failure of a business, which makes it particularly important to ensure the security of information.
(two) the application of firewall technology, control access rights, to achieve centralized management of network security. Firewall technology is an important network security technology developed this year. Its main function is to check the network communication at the entrance of the network, and ensure the internal and external network communication according to the security rules set by customers on the premise of protecting the internal network security. After installing a firewall at the network exit, the internal network is effectively isolated from the external network, and all access requests of the external network have to be checked by the firewall, so the security of the internal network has been greatly improved.
The firewall can accomplish the following specific tasks: filtering the source address, rejecting external illegal IP addresses, and effectively avoiding unauthorized access of hosts unrelated to business on the external network; Firewalls can only keep useful services and close other unnecessary services, which can minimize the possibility of system being attacked and leave hackers with no opportunity.
With the wide application and popularization of the network, network intrusion, virus destruction, spam treatment and ubiquitous security topics have become the focus of increasing attention. As the first line of defense of the network boundary, the firewall has flooded the whole network world from the initial router device configuration access policy for security protection to the formation of professional and independent products. In the field of network security, with the constant "fudge" of hacker application technology, the status of intrusion detection system IDS has gradually improved. In the network, only by effectively implementing IDS can we be keenly aware of the attacker's attack behavior and nip in the bud.
References:
Chen Jiaqi. Computer network security. University of Shanghai for Science and Technology, Electronic Textbooks, 2005.
[2] Hu Jianbin. Introduction to network and information security. Peking University Network and Information Security Laboratory, Electronic Textbook, 2005.
Enterprise Network Security Solutions Paper 2 Network Security Technology and Enterprise Network Security Solutions
The network security problem caused by its system vulnerabilities is a big problem for enterprises, and how to eliminate the security risks of running enterprise networks has become a big problem for enterprise management. The emergence of various network security technologies has brought an important guarantee for the network information security of enterprises and laid a solid foundation for the development of enterprises.
1 network security technology
1. 1 firewall technology
The main function of firewall technology is to realize effective access control between networks, isolate unidentified objects from the internal network of enterprises, and thus protect enterprise information.
If the company is compared to a person, the company's anti-theft system is like human skin, which is the first barrier to block foreign objects. All other anti-theft systems are based on firewalls. At present, the most commonly used and effective anti-theft system is firewall, which can be subdivided into proxy service firewall and packet filtering technology firewall. The role of proxy service firewall is generally to act as a middleman and perform supervisory duties when both parties conduct e-commerce transactions. Packet filtering technology firewall is like a sieve, which will selectively let data pass or isolate.
1.2 encryption technology
Encryption technology is a convenient technology commonly used by enterprises to protect data information. It mainly uses some encryption programs to protect some important data of enterprises and avoid being stolen and used by criminals. Commonly used encryption methods mainly include data encryption method and encryption algorithm based on public key. Data encryption mainly transforms important data through certain rules, changing its original characteristics, so that outsiders can't directly observe its essential meaning. This encryption technology is simple and effective, but there are some risks. Once the encryption rules are known to others, it is easy to delete them. Public key-based encryption algorithm refers to an encryption method consisting of a pair of unique keys (public key and private key). This encryption method has strong concealment. If outsiders want to get data information, they only need to get the relevant and unique private key, so it has strong confidentiality.
1.3 authentication technology
Identity authentication technology is to identify individuals according to specific characteristics, and judge whether the identified objects meet specific conditions according to the identification results, and then the system judges whether to open permissions to visitors. This method is very effective for impostors, such as fingerprints or posterior iris. Under normal circumstances, only I have the right to perform some exclusive operations, which is difficult to be simulated, so the security performance is relatively reliable. This technology is generally applied to the confidential process of highly confidential information in enterprises, and has strong practicability.
2 enterprise network security system solutions
2. 1 Control network access
Network access control is an important means to ensure enterprise network security. By setting various permissions, enterprises can avoid information outflow and ensure their competitiveness in the fierce market competition. Enterprise's network settings are set in an object-oriented way, and the access rights of a single object are set according to the network protocol, and the network is subdivided, and the rights of the staff in the enterprise are managed according to different functions. Enable the functions that enterprise office workers need to use, and cancel other work-related contents. In addition, write protection or read protection is set for some important information, which fundamentally ensures the security of confidential information of enterprises. In addition, access control to the network can be carried out in different periods, for example, a file can only be opened within a certain period of time on the corresponding date.
Network security should be considered in enterprise network design. Therefore, in the actual design process, it is necessary to manage the security of various network devices and network systems, such as scientifically managing the interfaces of various devices and the information transmission modes between devices, eliminating other functions on the basis of ensuring their basic functions, and eliminating the vulnerability of network security by using the current high-security network system.
In the process of enterprise operation, business needs often need to be connected to the enterprise internal network through remote connection equipment, and the fragile network system in the process of remote connection is very vulnerable to attacks by others. Therefore, remote access equipment with high security performance should be added to the enterprise network system to improve the security of remote network access. At the same time, reset the network system and encrypt the login identity information to ensure that the internal personnel information of the enterprise is not stolen by outsiders during the operation. In the process of data transmission, the transmitted data is audited by corresponding network technology to avoid information leakage through other channels and improve the security of information transmission.
2.2 secure transmission of the network
The supply chain in e-commerce era is based on network technology. All kinds of information in the supply chain are transmitted on the internal network of the enterprise and the network with suppliers. In the process of transmission, information is easily stolen by criminals, causing huge economic losses to enterprises. In order to prevent information from being stolen, enterprises can build a perfect network system, and isolate the unrecognizable identity from the enterprise network through firewall technology to ensure the transmission of enterprise information in a safe network environment. In addition, the transmitted information can be encrypted by corresponding encryption technology. Some hackers remove the firewall of the enterprise, and the stolen information is also incomprehensible encrypted data. Encrypted information usually exists in the form of garbled code. Theoretically, encrypted information may still be released, but the existing data encryption methods are all processed with complex keys. Even the most advanced password release technology takes a long time. By the time the data is released, the information has lost its timeliness and become useless information, which has no impact on the enterprise.
2.3 Network attack detection
Some hackers usually use some malicious programs to attack the enterprise network, looking for loopholes to enter the enterprise intranet to steal or change enterprise information. In order to avoid malicious network attacks, enterprises can introduce intrusion detection system and combine it with network access control to realize the double protection of enterprise information. According to the network structure of an enterprise, the intrusion detection system permeates all links within the enterprise network, especially the confidential information of important departments needs to be monitored. The firewall technology is used to realize the first protective barrier of enterprise network, and then with the detection technology and related encryption technology, the user's identity information is recorded in fire prevention, and the data is transmitted to the administrator when the unrecognized identity information is encountered. Subsequent intrusion detection technology will completely block the hacker's attack and analyze the hacker's identity information. Even if hackers get encrypted data through these barriers, it is difficult to get effective information from them. Through the cooperation of these network security technologies, the attacks from network hackers are completely eliminated to ensure the network security of enterprises.
3 Conclusion
With the advent of e-commerce era, network technology will play an irreplaceable role in future enterprise operation, and enterprise network security will also accompany enterprise management for a long time. Therefore, it is necessary to implement dynamic management of enterprise network to ensure the advanced nature of network security and establish a safe network environment for the development of enterprises.
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