Firewalls are not designed to keep viruses out

1.Concept: A component or set of elements used to restrict access to a protected network and the Internet, or to other networks, which can be software or specially designed hardware devices installed on a general PC or server.

2.Why do you need a firewall?

A: The Internet firewall is mainly designed to prevent hackers from deliberately destroying three ways:

1) Invasion: The most common way to destroy the computer, you can use the computer properly after the invasion. Intruders want to be able to become legitimate users and use the computer as they please.

2) Denial of Service: The easiest way to disrupt the system is that a hacker can paralyze a computer by sending out a flood of garbage packets, making the system unable to provide services normally.

3) Information theft: Hackers steal the user's account and password, and then they can enter the computer to steal the information they need.

3.What can a firewall do?

1) The firewall is the focus of security decisions.

The firewall is a choke point, and all incoming and outgoing transmissions must pass through this narrow, unique checkpoint, and the firewall provides great leverage in network security because it concentrates security measures on this checkpoint.

2) The firewall can enforce the security policy.

The firewall enforces the site's security policy, allowing only approved services to pass through and those services are set in the policy.

3) Firewalls can efficiently record Internet activities.

4) Firewalls can reduce the risk of network exposure.

The firewall can isolate the server host inside the firewall from the external network, so as to prevent problematic packets from affecting the security of the internal host.

4.What can't a firewall do?

1) The firewall can't control the wicked inside.

If the villain is already inside the firewall, he can steal data, damage hardware and software, and cleverly modify programs without having to approach the firewall. Insider threats require internal security measures, such as data center security management measures and personnel training.

2) The firewall tube does not go through its wiring.

Firewalls can't function without going through firewalls. For example, some stations allow dial-in access directly to the internal host, or technical and system administrators set up their own backdoors to enter the network.

3) Firewalls can't protect against new threats.

Firewalls are designed to protect against known threats, and a well-designed firewall may be able to protect against new threats, such as rejecting all but a few reliable services to prevent users from setting up new, highly insecure services.

4) The firewall does not protect against viruses.

Firewalls can't prevent PC and Macintosh viruses from entering the network, and while firewalls do scans for addresses, destinations, and port numbers, they are not detailed, and using the most sophisticated packet filtering or software is not practical for firewalls.

The purpose and function of a firewall.

The development of the Internet has brought revolutionary reform and opening up to enterprises, and enterprises are trying to make use of them.

It to improve the speed of market response and work efficiency, so as to be more competitive. Enterprises through the Internet, available.

In order to retrieve important data from other places, and at the same time face the new challenges of data security brought about by the opening of the Internet.

and new hazards: secure access for customers, sellers, mobile users, off-site employees, and internal employees; In order to.

and protecting the company's confidential information from hackers and industrial espionage. Therefore, enterprises must be safe.

trenches", and these "trenches" are going to be built in **?

There are two major parts of Internet-based applications: intranet and borrowing.

The technology and equipment that help the Internet construct the enterprise 3W network on the Internet, which can be put into all the enterprise information.

Cease; The extranet is based on the needs of e-commerce and mutual cooperation, and the channel between the intranet can be used.

Access to some information from other systems. Therefore, according to the security system of an enterprise, it can be seen that the firewall trench must be there.

The following locations are located on the location:

Secure access to hosts and applications;

Guarantee the security of a wide range of clients and servers;

Protect critical sectors from attacks from within, from outside, for the purpose of using the Internet with.

Provide secure access for employees, customers, and merchants who access remotely.

At the same time, the security of the firewall also comes from its good technical performance. Generally, firewalls have the following characteristics.

Point: Extensive service support through a combination of dynamic, application-layer filtering capabilities and authentication.

Implement WWW browser, HTTP server, FTP, etc.;

Encryption support for private data ensures virtual private networks and business activities over the Internet.

motion is not damaged;

Client authentication allows only specified users to access the internal network or select services, which is the local network of the enterprise.

Additional components for secure communication with branches, business partners and mobile users;

Anti-spoofing, which is a common means of obtaining access to a network from the outside, makes it seem like a packet is coming.

From within the network. Firewall-1 can monitor such packets and throw them away; C s mode.

and cross-platform support, which enables the management module running on one platform to control the supervision running on another platform.

view module. Solstice Firewall-1 also features the elimination of data copying and body conversion operations during monitoring.

Generates only negligible network latency, resulting in extremely high Ethernet speeds; And it can be easily expanded.

to a few thousand users with minimal impact on network performance.

The firewall is used to block all kinds of malicious attacks, including virus hackers, but it cannot kill viruses or detect viruses.

Firewalls are too general, the common one is a virus firewall, and the other is a network data firewall, depending on what you need to choose.

Now domestic manufacturers have called virus firewalls, which are real-time antiviruses. There is also a network firewall, which is generally used to defend against network attacks.

After entering, the left row is the option to set each function, as shown below

Firewalls do not protect against the following types of attacks:

Insider attacks: This kind of attack generally refers to tools launched from within the network, which can consume node energy and reduce the life of the network, and can interfere with the normal operation of the network, steal secret information in the network, and even publish false malicious information. Common insider attacks are Sybil attacks, replication attacks, tunneling attacks, etc.

Transferring infected software and files: This attack mainly uses the firewall to prevent virus attacks and the inability to scan inserted USB flash drives and other removable storage devices, so that once the software or files with viruses enter the computer, the entire network environment will be attacked.

Data-driven attacks: Data-driven attacks are attacks that are carried out by sending data to a service in an activity in order to produce unintended results. Common attacks include buffer overflow attacks, formatted string attacks, input validation attacks, synchronization vulnerability attacks, and trust vulnerability attacks.

Firewalls do not protect against attacks by internal network users, transmission of infected software and files, and data-driven attacks. Firewall is mainly used by hardware and software to act on the internal and external network environment to produce a protective barrier, so as to achieve the blocking of computer insecure network factors. Users are only allowed to enter the computer with the consent of the firewall.

Extended information: All network traffic between the internal and external networks must pass through a firewall. This is a characteristic of the network location of the firewall, and it is also a premise.

Because only when the firewall is the communication channel between the internal and external networks, can the enterprise network be fully and effectively protected from infringement.

Legal basis: The Firewall: The Complete Book of Human Resources Legal Risk Warnings closely combines the latest legal provisions, starting from the basic spirit of labor legislation, labor laws, regulations and policy provisions, taking the labor relationship established between enterprises and employees as the core, taking the confusing concepts and typical problems encountered by human resources practitioners as the main line, listing the problems often encountered by human resources practitioners in management, and putting forward specific solutions for the number of answers in a targeted manner.