What is a Firewall icon

What is a Firewall?

A Firewall is a network security device that monitors incoming and outgoing network traffic. A Firewall enforces an organization’s security policy by filtering network traffic. At its most basic a Firewall is essentially the boundary or barrier between two networks to identify threats in incoming traffic and blocks specific traffic, once flagged by a defined set of security rules, while allowing non-threatening traffic through.

Why is a Firewall important?

Firewalls have existed since the late 80’s and started as “packet filters,” which were networks set up to examine packets transferred between computers. They’ve come a long way since then, but the basic principle behind why they’re so important remains: You’re setting up your network with rules for users and protecting your network from threats.

What types of Firewalls are there?

  • Packet filtering: A small amount of data is analyzed and distributed according to the filter’s standards.
  • Proxy service: Network security system that protects while filtering messages at the application layer.
  • Stateful inspection: Dynamic packet filtering that monitors active connections to determine which network packets to allow through the Firewall.
  • Next Generation Firewall: Deep packet inspection Firewall with application-level inspection.

What do they do?

A Firewall is a necessary part of daily computing and takes the guesswork out of your hands and entrusts it to your network security device. Firewalls, and especially Next Generation Firewalls, focus on blocking malware and application-layer attacks, along with an integrated intrusion prevention system (IPS), these Next Generation Firewalls are able to react quickly and seamlessly to detect and react to outside attacks across the whole network. They can set policies to better defend your network and carry out quick assessments to detect invasive or suspicious activity, like malware, and shut it down.

Why do you need them?

Every network needs malware defense, and advanced malware defense involves many layers of safeguards, including continuous network scans. There are many types of malware that a Firewall can protect against, including:

  • Virus: A virus is a malicious,downloadable file that can lay dormant that replicates itself by changing other computer programs with its own code. Once it spreads those files are infected and can spread from one computer to another, and/or corrupt or destroy network data.
  • Worms: Can slow down computer networks by eating up bandwidth as well as the slow the efficiency of your computer to process data. A worm is a standalone malware that can propagate and work independently of other files, where a virus needs a host program to spread.
  • Trojan: A trojan is a backdoor program that creates an entryway for malicious users to access the computer system by using what looks like a real program, but quickly turns out to be harmful. A trojan virus can delete files, activate other malware hidden on your computer network, such as a virus and steal valuable data.
  • Spyware: Much like its name, spyware is a computer virus that gathers information about a person or organization without their express knowledge and may send the information gathered to a third party without the consumer’s consent.
  • Adware: Can redirect your search requests to advertising websites and collect marketing data about you in the process so that customized advertisements will be displayed based on your search and buying history.
  • Ransomware: This is a type of trojan cyberware that is designed to gain money from the person or organization’s computer on which it is installed by encrypting data so that it is unusable, blocking access to the user’s system.

Every system needs protection and there is no better way to have a broad spectrum of protection, and peace of mind, knowing that the computer system you use is completely protected from any and all types of malware and threats.


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