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Firewall Write For Us

Firewall – A firewall is a system that controls unauthorized outgoing and incoming traffic on a LAN network. LAN networks are those that we have at home, counting from the router to the different devices that we may have connected to it, both by cable and by WiFi. The term firewall, or firewall, refers to a computer security system that prevents unauthorized access to our LAN , that is, from the outside (WAN). In this way, the firewall does just that by placing a virtual “wall” to connections that are not authorized to send traffic to our LAN.

WAN networks (Wide Area Network) have their end in the router that we have at home, from the router inwards everything is LAN, which is what the firewall protects. All routers come with a firewall activated and preconfigured by the ISP (internet provider), although we can manipulate it to enable external connections . This is done by opening ports or using a DMZ (Demilitarized Zone), which allows the flow of traffic between the devices on the LAN and those on the DMZ and the WAN. By default, the router’s firewall blocks all unwanted traffic and acts as a good firewall.

In Windows, or in any other operating system, we can find firewalls installed as standard, immovable. It is done so that each device has additional protection, so it is highly recommended to have it activate for both public and private networks . Exceptions can be add to suit the consumer from the OS’s own firewall, but it is recommend to have prior knowledge of what is manipulating, as it can lead to contracting computer viruses

What Is a Firewall?

A firewall is net security beneficial that displays inbound and outbound network road traffic and decides whether to allow or block positive traffic based on a defined set of security rules.

Firewalls have been the first line of security in network security for over 25 years. They create a barrier between secure and controlled internal networks that can be trusted and untrusted external networks like the Internet.

Why is a firewall important?

Unprotected networks are vulnerable to any traffic trying to access their systems. Therefore, whether malicious or not, network traffic should always be examined.

Connecting personal computers to other computer systems or the Internet offers many positive possibilities. However, easy collaboration with others, pooling resources, and enhanced creativity can come at the expense of comprehensive device and network protection. Hacking, identity theft, malware, and online fraud are common threats that users may encounter when exposed by connecting their computers to a network or the Internet.

Once discovered by a malicious actor, your network and devices can be easily learned, quickly access, and exposed to repeated threats. A 24-hour internet connection increases this risk (because your network can be access at any time).

Proactive protection is essential when using any network. Users can protect themselves from the worst dangers by building an invisible wall to filter out these threats. And also, Fortunately, an invisible fence already exists: it’s known as the firewall.

How does a Firewall work?

A firewall works as a wall between the Internet or other open networks and our computer. All types of traffic that are not in the list allowed by the Firewall does not enter or leave the computer.

For this, a firewall system contains a set of predefined rules that allow:

Allow a connection (Allow)

Block a connection (Deny)

Redirect a connection request without notifying the issuer (Drop).

The set of these rules allows installing a filtering method depending on the security policy adopted by the organization.

When you have a computer that connects to the internet or any network, you must have security criteria to protect your information and the PC. Therefore, to avoid possible attacks, nothing better than using a Firewall.