---
title: "What is a Firewall?"  
description: "What is a Firewall?"  
author: "Sandra Emily"  
published: 2022-04-25  
canonical: https://answers.mindstick.com/qa/96987/what-is-a-firewall  
category: "troubleshooting"  
tags: ["troubleshooting", "internet", "network layer", "networking"]  
reading_time: 1 minute  

---

# What is a Firewall?

What is a [Firewall](https://www.mindstick.com/blog/306201/firewall-solutions-for-tech-inspired-businesses-key-facts-to-know)?

## Answers

### Answer by Hitesh Vohra

- A **firewall** is a network security device that analyses incoming and outgoing network traffic and determines whether specific traffic should be allowed or blocked based on a set of security rules.
- For more than 25 years, firewalls have served as the first line of defence in network security. They create a barrier between secure, controlled internal [**networks**](https://answers.mindstick.com/qa/94985/how-do-i-change-a-networking-group-in-windows-10) that can be trusted and untrustworthy external networks like the Internet.
- A firewall can be hardware, software, or a combination of the two.
- A firewall is a network security device that monitors and regulates incoming and outgoing network traffic according to specified security rules in computing. A firewall is a device that separates a trusted network from an untrusted network, such as the Internet.

\

## Read More: [What is NIC?](https://answers.mindstick.com/qa/96989/what-is-nic)


---

Original Source: https://answers.mindstick.com/qa/96987/what-is-a-firewall

Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.