The data type of a personal firewall, what is a personal firewall

Personal firewall products such as Norton from Symantec, Blackice Defender from Network Ice, Cisco from McAfee, and Free ZoneAlarm from Zone Lab can help you monitor and manage your system to prevent computer viruses, rogue software and other programs from entering your computer through the network or spreading outside without your knowledge. These software can be used independently on the entire system or for individual programs and projects, so they are very convenient and practical to use.

In the field of computer computing, a firewall is a device that helps ensure the security of information, allowing or restricting the passage of transmitted data according to specific rules. A firewall is a piece of hardware or a set of software that is built on top of common hardware.

1.A personal firewall is a technology that prevents information from being invaded by the outside on your computer by monitoring and preventing any unauthorized access to or transmission of data into the Internet and other network systems in your system.

In layman's terms, antivirus software with network protection on a personal computer, a personal firewall Ruanjian, or a firewall built with a Windows or Linux system are considered personal firewalls.

The corresponding enterprise firewall is a firewall installed on a hardware server, which protects the entire LAN through one or more servers.

Firewall, also known as Protective Wall, was invented and introduced to the Internet in 1993 by Gil Shwed, the founder of Check Point (US5606668(A)1993-12-15). A firewall is a barrier between the internal and external networks that controls the flow of data packets in and out according to predefined rules defined by the system administrator. A firewall is the first line of defense for the system, and its role is to prevent unauthorized users from entering.

The so-called firewall refers to a combination of software and hardware devices, between the internal network and the external network, between the private network and the public network to construct a protective barrier. It is a combination of computer hardware and software, so that a security gateway (security gateway) is established between the Internet and the intranet, so as to protect the intranet from the intrusion of illegal users, the firewall is mainly composed of four parts: service access rules, authentication tools, packet filtering and application gateways, and the firewall is a software or hardware located between the computer and the network it is connected to. All network traffic and packets flowing in and out of the computer pass through this firewall.

Personal hardware firewall refers to the hardware device that puts the firewall program inside the chip, and the chip program implements the network security policy and monitors all ports of the system. The personal hardware firewall can carry out packet filtering, Trojan horse filtering and script filtering by relying on the implanted chip program, so as to avoid malicious attacks on the computer and improve network security. It is about the size of a router used in the home, and is generally connected to the external network interface and the internal network through a network cable, so it can be easily used without setting up.

Personal hardware firewalls have the characteristics of simple installation, easy to use, small size, and low size.