Firewall

Introduction

The computer like a living organism has defense mechanisms to optimize its ability to fight of attacks and maintain system integrity.  The human body has different mechanisms to protect itself from harm and so does the computer.  Three powerful computer mechanisms are Firewalls, Automatic Updates and Anti-viruses.  Today I will chat about Firewalls.

Firewalls

A Literal firewall prevents fire from penetrating the building and similarly, a computer firewall prevents unauthorized programs like viruses and persons from penetrating the computer over the internet while at the same time allowing free communication with authorized people. One major implication of this is that your computer may block legitimate programs that you need to run in order to maximize your internet experience.  Thus it is in your best interest to familiarize yourself with the firewall settings so that you can unblock or block programs as you see fit.

Accessing the Firewall

Whether Windows 7, Vista or Xp, one can access Windows Firewall through Control Panel.  In Windows Xp one gets to Control Panel simply by clicking "Start", "Control Panel".  There are two major firewall options: "on" or "off". The default setting is "on".  When it is on, you can decide on the programs not to block which will be placed in the exceptions.  Turning off firewall is generally not a good idea unless you know what you are doing. Of course, turning off firewall makes your system more vulnerable to foreign attack when you are connected to the internet.