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This article mainly introduces the types of firewalls in the computer, which have a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to understand it.

Firewalls cannot prevent attacks that take advantage of vulnerabilities in server systems and network protocols. The main function of firewall technology is to find and deal with the security risks and data transmission problems that may exist when the computer network is running.

Firewalls cannot prevent attacks that take advantage of vulnerabilities in server systems and network protocols.

Firewall introduction:

Firewall technology is a technology that helps computer networks build a relatively isolated protection barrier between their internal and external networks by organically combining all kinds of software and hardware equipment used for security management and screening, in order to protect the security of user data and information.

The main function of firewall technology is to find and deal with the security risks and data transmission problems that may exist in the operation of computer network in time, including isolation and protection. At the same time, various operations in computer network security can be recorded and detected to ensure the security of computer network operation and the integrity of user data and information. Provide users with a better and more secure computer network experience.

Type of firewall:

(1) filtering firewall

In the network layer and transport layer, the filtering firewall can be analyzed based on the address of the data source and the type of protocol to determine whether it can be passed or not. In line with the firewall standards, meet the security performance and type of information transmission, and some unsafe factors will be filtered and blocked by the firewall.

(2) apply proxy type firewall

The main working scope of the application proxy firewall is at the highest layer of OSI, above the application layer. Its main feature is that the network traffic can be completely isolated, and the supervision and control of the application layer can be realized through specific agents. These two kinds of firewalls are widely used, and the application effects of other firewalls are also more obvious. in practical application, it is necessary to choose the type of firewall according to the specific needs and conditions. only in this way can we effectively avoid the external intrusion of the firewall and other problems.

(3) compound type

At present, the widely used firewall technology is compound firewall technology, which combines the advantages of packet filtering firewall technology and proxy firewall technology. for example, the security policy sent is packet filtering policy. then access control can be carried out for the header part of the message If the security policy is a proxy policy, access control can be carried out for the content data of the message, so the composite firewall technology combines the advantages of its components and abandons the original shortcomings of the two kinds of firewalls. it greatly improves the flexibility and security of firewall technology in application practice.

Thank you for reading this article carefully. I hope the article "what are the types of firewalls in computers" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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