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This article will explain in detail what are the key technologies related to high-defense server firewalls. The content of the article is of high quality. Therefore, Xiaobian shares it with you as a reference. I hope that after reading this article, you will have a certain understanding of relevant knowledge.

Firewall is a kind of technology that helps computer network to construct a relatively isolated protective barrier between internal and external networks by organically combining various software and hardware devices used for security management and screening, so as to protect user data and information security.

In the high-defense server rental, the function of the firewall is mainly to discover and deal with the possible security risks and data transmission problems in the operation of the computer network in time, including isolation and protection, and at the same time, it can record and detect various operations in the computer network security, so as to ensure the security of the computer network operation, guarantee the integrity of user data and information, and provide better and safer Internet services for users. Xiaobian introduces you to the following key technologies of firewall:

1. Packet filtering technology

The packet filtering technology of firewall is generally only applied to the data of OSI7 layer model network layer, which can complete the state inspection of firewall, so that the logic policy can be determined in advance. Logic policy is mainly aimed at address, port and source address. All data passing through firewall needs to be analyzed. If the information in the data packet does not match the policy requirements, the data packet can pass smoothly. If it is completely consistent, the data packet will be intercepted quickly. In the process of computer data packet transmission, it will generally be decomposed into a lot of small data packets composed of destination and geology. When they pass through the firewall, although they can be transmitted through many transmission paths, they will eventually converge at the same place. At this destination point, all data packets need to be detected by the firewall. Only after passing the inspection can they be allowed to pass through. If in the process of transmission, In case of packet loss and address change, etc., it will be discarded.

2. Encryption technology

In the process of computer information transmission, the firewall can also effectively realize the encryption of information. Through this encryption technology, relevant personnel can effectively encrypt the transmitted information. The information password is mastered by both parties of information exchange. The personnel who receive the information need to decrypt the encrypted information before obtaining the transmitted information data. In the application of firewall encryption technology, attention should be paid to the security of information encryption processing. In the application of firewall technology, in order to realize the safe transmission of information, it is also necessary to verify the identity of the user. After encryption, the transmission of information needs to authorize the user, and then the identity of the information receiver and the sender needs to be verified, so as to establish a channel for safe transmission of information and ensure that the network information of the computer has good security in the transmission. Illegal elements do not have correct identity verification conditions. Therefore, It cannot invade the network information of the computer.

3. Anti-virus technology

Firewall has the function of anti-virus. In the application of anti-virus technology, it mainly includes virus prevention, elimination and detection. For the anti-virus prevention function of the firewall, in the process of network construction, the information data between the computer and the Internet is strictly controlled by installing the corresponding firewall, thus forming a safe barrier to protect the computer external network and the intranet data. Computer network to connect, generally through the Internet and router connection to achieve, then the network protection needs to start from the backbone network part, in the backbone network central resources to prevent illegal access to the server, in order to prevent illegal intrusion of information theft, in the computer connection port access data, but also strict inspection of Ethernet and IP address, stolen IP address will be discarded, At the same time, it will also comprehensively record important information resources to ensure that its computer information network has good security.

4. Proxy Server

Proxy server is a widely used function of firewall technology. According to the network operation method of computer, proxy server can be set up through firewall technology, so as to carry out information exchange by proxy server. When the information data is sent from the intranet to the extranet, the information data will carry the correct IP, and the illegal attacker can branch the information data IP as the tracking object to let the virus enter the intranet. If the proxy server is used, the virtualization of the information data IP can be realized, and the illegal attacker cannot obtain the real analysis information in the tracking of the virtual IP, so that the proxy server realizes the security protection of the computer network. In addition, the proxy server can also transfer information data, control the interaction of computer intranet and extranet information, and protect computer network security.

Firewall is actually a kind of isolation technology, which separates intranet from public access network. Only when the firewall agrees, the user can enter the computer. If he does not agree, he will be blocked from the outside. It prevents the access of network hackers to the greatest extent and also prevents the direct contact between viruses and computer systems. It is the "city wall" of the local area network and computers. In the high defense server lease, the role of the firewall can not be ignored.

What are the key technologies for high-defense server firewalls to share here, I hope the above content can be of some help to everyone, you can learn more knowledge. If you think the article is good, you can share it so that more people can see it.

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