As the most important and basic infrastructure for network security, the firewall has been recognized by the majority of users, and is recognized as a mature technology, mature product and mature market. With the development of information technology, the firewall market has developed by leaps and bounds in recent years. Information security has been highly valued by various industries. In particular, the application of firewall products has extended to banks, insurance, securities, post and telecommunications, military, customs, Various industries such as taxation and government. Therefore, firewall products have become the focus of domestic security product competition.
[Higher requirements for firewall systems]
The continuous development of the firewall makes it a system, and it also puts forward higher requirements for the firewall as a whole, which is mainly reflected in: high performance, high stability and reliability, and high application adaptability.
1. High performance
Naturally, so many functions must inevitably require the system to have efficient processing capabilities. Generally, performance improvement is mainly concentrated in two aspects: hardware and software, which is also related to the type of firewall.
Software firewalls work hard on software design and put forward higher requirements on the system platform. The performance improvement in software is mainly reflected in the structure and implementation of operating systems and application systems. Most of the products of foreign manufacturers design their own dedicated systems, so they are often very small and highly efficient. Like a foreign firewall, although the performance of the hardware platform it uses is not high (Pentium 200, 32M memory), the performance is very good compared to the same period last year.
Hardware firewalls make efforts in both software and hardware. In this respect, the common practice of foreign firewall manufacturers is to hardwareize software operations. The performance of the operating platform designed or selected by them may not be high, but it will be the main operation. The program (table lookup operation is the main job of the firewall) is made into a chip to reduce the operation pressure on the CPU of the host machine system. The effect of this is often very good, which is also one of the advantages of foreign manufacturers. The firewalls of domestic manufacturers are mainly in the form of hardware. The hardware platform often adopts a general IPC (industrial control computer) system (which can save the cost of hardware development), so the improvement of hardware performance is often directly manifested as improving the processing power of the system CPU and increasing the memory capacity. In terms of software performance, there are not many domestic manufacturers working hard. Almost all manufacturers' software systems are based on Linux.
2. High stability and reliability
The firewall system's efforts for high efficiency often directly affect its stable reliability index. The reliability of a complex system is difficult to trust, and reliability is very important to users, even fatal. Frequently malfunctioning systems frighten network administrators, and the losses caused in important systems are also unbearable, which is particularly prominent in the application of financial securities.
The reliability of the firewall is also reflected in two aspects: hardware and software.
IPC (Industrial Computer) has done a good job in this respect. Although it also uses the IntelX86 PC structure, it does the following processing: the basic system is completely integrated on a PCB, mainly reflected in the network interface Intel82559 chip used directly On the board, this naturally improves the reliability of the product. The memory uses electronic storage instead of mechanical magnetic media storage. The reliability improvement is obvious. Whether it is earthquake resistance, adaptability to temperature and humidity, and long-term operation, the chip is much more reliable, and hard drives always have Longevity.
Of course, the improvement of software reliability is also the main difference between the advantages and disadvantages of firewalls. The continuous development of security requirements and network applications has kept the firewall in constant expansion and revision, which has brought great difficulty to its reliability and stability. Generally, a small revision requires complete testing and application inspection of the firewall.
3. High application adaptability
The application adaptability of the firewall is an inevitable problem facing the use and promotion of the product to a certain stage, which is mainly reflected in the flexibility of the product. In fact, flexibility is often not designed by designers, but used by users. To meet the user's one-time application requirements, the flexibility of use of the product may go one step further. Therefore, the maturity of a product takes time. The flexibility of product use is relative to a certain use environment, which also forms the characteristics of domestic users on the use of firewalls.
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