When it comes to Internet safety, a lot of words get thrown around, but too often they’re not explained properly. That’s why we’ve decided to write about firewalls, to help you understand this particular security tool and its importance.
[h=3]So, exactly what is a firewall?[/h] A firewall is a system that blocks unauthorised transmissions to or from a private network. Essentially, firewalls stop intruders or hackers from forcing their way into your computer from outside, and prevent any rogue software lurking on your machine from sending information the other way.
Unless your computer is not connected to the Internet, at all, ever, it will interact with other computers. It does this via “openings” in your network called ports. The idea of a firewall is to close off any ports you are not using, and check any transmissions through the ones that you are.
Without a firewall, it’s simply too easy for hackers to raid your computer for your personal information.