How Firewall Works

Title: How Firewalls Work


In the digital era, where cyber threats are ever changing, protection of our networks and devices is a priority. Among the fundamental tools in network security is the firewall. It is a divide between your internal network and the rest of the internet which can be a vast field of insecurity. This article will look into different aspects on how firewalls work, their types and methodologies of implementing them.

What is a Firewall?

A firewall is an independent or integrated computer program that protects sensitive data by filtering traffic to and from computers based on specified rules. It creates a barrier between trusted internal networks and untrusted external ones like Internet.

How Does a Firewall Work?

Firewalls check what goes in and out of a network by checking packets against predetermined rules for accepting or rejecting them. These can be used to screen traffic based on IP addresses, port numbers, protocols among other things.

Types of Firewalls

There are various classifications of firewalls each characterized with its own features and capabilities as shown below:

Protection of our networks and devices from online threats is the crucial role of firewalls. To keep your network secure, it is important that you have an understanding of how firewalls work and follow best practices. By adhering to what has been specified in this article, it is possible to heighten the security of your network to protect against a variety of cyber risks.