We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What are Firewalls?

L. S. Wynn
By L. S. Wynn
Updated May 16, 2024
Our promise to you
EasyTechJunkie is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At EasyTechJunkie, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

In construction, a firewall is a non-flammable wall that prevents fires from spreading throughout a building. Homes, for example, may have a firewall between the garage and the rest of the house to prevent garage fires from threatening other rooms.

With the rapid popularization of the internet, the term firewall is more commonly used in computer networking. Like the firewalls used in homes and buildings, computer firewalls act as a barrier between computers on a network. For companies with a computer network or for individuals with a permanent connection to the internet (such as through DSL or cable), a firewall is critical. Without a firewall, intruders on the network would likely be able to destroy, tamper with or gain access to the files on your computer.

Firewalls can come in the form of hardware or software. Without getting into the complex details of how firewalls work, suffice it to say that function with a set of filters that are constantly monitoring traffic on the network. Whenever a packet of information triggers one of the filters, the firewall prevents it from passing through in the attempt to prevent damage. Of course, firewalls sometimes block wanted traffic, and through a continual process of refinement, the filters can be customized to improve their efficacy.

Many computer users who access the internet via a broadband router, may already be benefitting from a firewall. The router itself may be configured to serve as a firewall; any nefarious attacks from the network, are halted at the router thereby sparing any ill effects to the computer. Such a hardware firewall can be further bolstered with a secondary line of defense in the form of a software firewall; you can never be too safe when using the internet!

If you would like more detailed information regarding firewalls, how they work or how to configure them, etc. please visit the link provided in the source section below.

EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
By anon195572 — On Jul 12, 2011

How can you put a firewall up for a wireless router? People in my complex are able to use my wireless internet and I want to change that.

By drtroubles — On May 30, 2011

If you would like extra security on your computer how do you know which firewalls you already have installed?

I would like to add some if I need to, but am not sure which of my browsers already have them. I currently use Firefox, Safari and occasional Internet Explorer.

Also, even if your browsers do already have firewalls, is it possible to add extra ones if you suspect a website is trying to get access to your files?

There are a few sites that I visit for downloads, and I am always worried that I may be exposing my computer to unwanted attention. I have a lot of files on my computer that I really would like to keep safe.

By lonelygod — On May 29, 2011

@gygglez - Firewalls wouldn't stop people from using your WiFi. These are more to stop websites from putting malware onto your computer.

If you have a wireless router, and everyone has access to your WiFi signal, you actually need to put a password in place. This can usually be done with the software that came to install your router.

I used to have this problem as well, but setting up the password was very easy. If guidelines aren't in the book that came with the router, you can search for how to setup a password on my wireless router. Adding your model number to the search helps a lot.

By gygglez — On Apr 06, 2011

How can you put a firewall up for a wireless router? People in my complex are able to use my wireless internet and I want to change that.

By helene55 — On Jan 05, 2011

Many computer operating systems have their own firewalls, as do many internet systems. For example, I have two free firewalls on my computer, one from Windows and one from Firefox. For the most part, these can fulfill more basic internet needs, although it's important to make sure you are configuring them correctly if you want more than basic firewall security.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.