What is a Firewall ?

 

A computer firewall protects your computer by putting up a barrier to keep anyone from accessing your files when you are connected to the Internet.  The common term for this is " hacking " your system - but it is important to understand that in most cases, computers are hacked by malicious software, and not a specific person as has been made popular in the movies.  

Typically, an attack on your computer or attempted hack is carried out by an automated software application that is designed to search for holes in your security.  This is like a back door to your computer, and once penetrated, the software has complete access to your entire system including sensitive information such as bank records, passwords and even your family pictures and email.  Depending on the application, the software will either ferret out your information, or will report back to its owner that your system is vulnerable and their is a back door access available.  

Once a hacker get access to your files malicious codes spread through your computer retrieving your personal information that the hacker can use to steal your identity or charge items with your credit card numbers.  In extreme cases, blackmail and large scale fraud has taken place.   

So how does a firewall work?
A firewall not only stops intruders, be it a person or a malicious software application from accessing your computer, as well as contain it so it can't spread to your other files. That's why it's called a firewall because its job is similar to a firewall that keeps a fire from spreading from one area to the next.

If a hacker tries to invade your computer files to get your passwords and credit card numbers, your firewall will prevent access.  Firewall software is designed to interpret threats to your system, allowing safe programs to run, while preventing malicious software from taking root in your system and works in conjunction with your virus protection suite.   It's common to think that the anti-virus software that came with your computer protects you from hackers. While it's important to keep anti-virus software updated for viruses,  it does not protect you from direct attacks against your computer and subsequently is as important to your online security as your anti-virus software is. 

Regardless of your internet connection, every minute that your computer is connected to the internet, you are risk. Hackers with their malicious software are looking to do you harm and even steal your identity. Identity theft is one of the fastest growing crimes today.  One of the most effective ways to guard your personal information and keep these criminals away from your sensitive passwords and credit card numbers is the use of computer firewall protection.


Recommended Firewall Software

There are several effective firewall software applications available for use, but one of the best we have come across is called Firewall Gold and we install it on all of our client's computers.   We prefer their software because of its ease of use and low maintenance problems as well as for their online support desk.  


Document Resources
You can go to the Firewall Gold site by clicking here.


Other Links You May Be Interested In
What is a Registry ?
How to Back Up Your Computer
AskNerd what ever you want - he'll give you a non-technical answer to your technical questions.